California Fruit and Vegetable

Tag: Vegetables West Magazine

  • National Watermelon Promotion Board Partners with Disney and Pixar’s Luca

    It will be a summer of adventure for National Watermelon Promotion Board (NWPB), thanks to a month-long collaboration with Disney and Pixar’s original feature film Luca, which streams exclusively on Disney+ starting June 18.

    “Luca” is a fun and heartwarming story about friendship, stepping out of your comfort zone and an extraordinary pair of sea monsters who experience a life-changing summer. Watermelon makes a special cameo in the film as sea monsters Luca and Alberto, who look human when they’re dry, venture beyond the surface to the Italian seaside town of Portorosso to see—and taste—all this new world has to offer.

    The Joy of Watermelon Meets the Thrill of Pixar

    As part of its collaboration, NWPB has developed the “Unforgettable Summer” campaign, connecting watermelon and Luca’s inherent themes of summertime joy and happiness.

    Throughout the month of June, NWPB will encourage people nationwide to visit a special landing page (Watermelon.org/PixarLuca) to either share an unforgettable summer adventure they’ve had or would like to have in 2021.

    Individuals who share their stories and dreams are entered for the chance to win weekly prizes, such as Lucamerchandise or one grand prize of an “Unforgettable Movie Night” prize pack which includes an Outdoor Movie Projector, Projector Screen, Popcorn Maker, Watermelon Slicer and a BlendJet.

     

    “Watermelon and summertime adventures go hand-in-hand, which makes our collaboration with Disney and Pixar’s Luca a perfect pairing,” said Stephanie Barlow, Senior Director of Communications, NWPB. “While watermelon is incredibly versatile, there’s no denying most everyone associates enjoying watermelon with our best summer memories – whether it’s family picnics, weekend getaways or unforgettable vacations. That connects directly with the themes of Luca, which arrives just as we find ourselves in peak watermelon season.

    “Our members are incredibly excited about the “Unforgettable Summer” campaign, as well, and look forward to sharing with their stakeholders in the months ahead,” Barlow added.

    On the Watermelon.org landing page, visitors also will find:

    • The world of Luca brought to life.
    • The film’s trailer.
    • Watermelon recipes inspired by Italian cuisine – such as “Watermelon Pizza alla Italia” and “Watermelon Caprese alla Feta.”
    • A chance to enter the “Unforgettable Summer” Sweepstakes*.

    Promotions Online and In Social

    To draw people to the landing page, NWPB will promote the collaboration on its social channels as well as via pre-roll digital ads – all targeting watermelon lovers while drawing new fans and followers of Pixar and Luca.

    About National Watermelon Promotion Board

    The National Watermelon Promotion Board (NWPB), based in Winter Springs, Florida, was established in 1989 as an agricultural promotion group to promote watermelon in the United States and in various markets abroad. Funded through a self-mandated industry assessment paid by more than 800 watermelon producers, handlers and importers, NWPB mission is to increase consumer demand for watermelon through promotion, research and education programs.

    Watermelon packs a nutritious punch, with each serving providing an excellent source of Vitamin C (25% DV), a source of Vitamin B6 (8% DV), and a delicious way to stay hydrated (92% water), with only 80 calories per 2-cup serving. Watermelon consumption per capita in the United States was an estimated 16 pounds in 2020. Watermelon consumption in the United States was approximately 5.3 billion pounds in 2020. The United States exported an additional 359 million pounds of watermelon.

    About Disney and Pixar’s LUCA

    Set in a beautiful seaside town on the Italian Riviera, Disney and Pixar’s original feature film “Luca” is a coming-of-age story about one young boy experiencing an unforgettable summer filled with gelato, pasta and endless scooter rides. Luca (voice of Jacob Tremblay) shares these adventures with his newfound best friend, Alberto (voice of Jack Dylan Grazer), but all the fun is threatened by a deeply-held secret: they are sea monsters from another world just below the water’s surface. Directed by Academy Award® nominee Enrico Casarosa (“La Luna”) and produced by Andrea Warren (“Lava,” “Cars 3”), “Luca” debuts exclusively on Disney+ on June 18, 2021.

    *Open to legal residents of the 50 United States and D.C., age 18 or older. Void where prohibited. Sweepstakes starts June 1, 2021 and ends at 11:59 p.m. EST on July 2, 2021. For full official rules and to enter, visit www.Watermelon.org/PixarLuca. Sponsored by National Watermelon Promotion Board, 1321 Sundial Point, Winter Springs, FL 32708.

  • What the Farm Workforce Modernization Act Means for Farmers

    While it has seemed impossible to get anything done at the national level regarding ag labor reform, Sara Neagu-Reed from the federal policy Division of the California Farm Bureau Federation shares in an interview with California Ag Network that hope is on the horizon with the progress of the Farm Workforce Modernization Act. Watch this brief video with Sara as she explains why, and what ag employers should know and do about it.
    Please thank this video’s sponsor Trece for their industry support.

  • USDA’s Risk Management Agency Amends Potato Crop Insurance Options

    The U.S. Department of Agriculture (USDA) announced on May 4th that its Risk Management Agency (RMA) is modifying four Northern Potato Crop Insurance Policy optional endorsements. The options are available to producers who choose to purchase additional coverage on top of their multi-peril crop insurance policy. The changes specify that the premium only applies to planted acreage and is no longer charged on acreage prevented from planting. The changes will be effective for the 2022 and succeeding crop years.

    RMA Acting Administrator Richard Flournoy

    “Producers will benefit from this change since the premium will only be due for years when the crop is planted, which will make the additional coverage more affordable in years when the crop is prevented from planting,” said RMA Acting Administrator Richard Flournoy.

    The modifications are applicable to the Quality Endorsement, Processing Quality Endorsement, Certified Seed Endorsement and the Storage Coverage Endorsement. Currently, insured operations are charged a premium if they elect the optional endorsements by the sales closing date, regardless if the acreage was prevented from planting or not.

    For example, the Storage Coverage Endorsement extends crop insurance coverage for potatoes that have been harvested and are in storage. Acreage prevented from planting would not need coverage that is specifically designed for a final harvested crop. Previously the acreage was still charged a premium.

    The changes are a result of RMA’s outreach to potato commodity groups and the crop insurance industry. With these changes, producers will see their premium reduced during years when there are prevented planting losses and an offsetting increase in years without those losses, which enhances the overall financial stability provided by insurance.

    Crop insurance is sold and delivered solely through private crop insurance agents. A list of crop insurance agents is available online using the RMA Agent Locator. Learn more about crop insurance and the modern farm safety net at rma.usda.gov.

    USDA touches the lives of all Americans each day in so many positive ways. In the Biden-Harris Administration, USDA is transforming America’s food system with a greater focus on more resilient local and regional food production, fairer markets for all producers, ensuring access to healthy and nutritious food in all communities, building new markets and streams of income for farmers and producers using climate smart food and forestry practices, making historic investments in infrastructure and clean energy capabilities in rural America, and committing to equity across the Department by removing systemic barriers and building a workforce more representative of America. To learn more, visit www.usda.gov.

  • FDA Issues Report Highlighting Salmonella Outbreak in Red Onions

    The U.S. Food and Drug Administration (FDA) has released a report on its investigation of the Salmonella Newport outbreak that caused more than 1,600 reported illnesses in the U.S. and Canada between June and October 2020. The FDA worked with the U.S. Centers for Disease Control and Prevention (CDC), state partners, and Canadian officials (Public Health Agency of Canada and Canadian Food Inspection Agency) to investigate the outbreak, which was linked through epidemiology and traceback to whole red onions supplied by Thomson International Inc., headquartered in Bakersfield (Southern San Joaquin Valley) with additional operations in Holtville (Imperial Valley), California. The outbreak is the largest Salmonella foodborne illness outbreak in over a decade. The report released today includes an overview of the traceback investigation, subsequent on-site interviews, visual observations of the growing fields, and environmental sampling, and various factors that potentially contributed to the contamination of red onions with Salmonella.

    Although a conclusive root cause could not be identified, several potential contributing factors to the 2020 Salmonella outbreak linked to red onions were identified. These include:

    • potentially contaminated sources of irrigation water;
    • sheep grazing on adjacent land;
    • signs of animal intrusion, including scat (fecal droppings), and large flocks of birds that may spread contamination; and
    • food contact surfaces that had not been inspected, maintained, or cleaned as frequently as necessary to protect against the contamination of produce.

    In sampling conducted in Holtville, CA, the FDA found Salmonella Newport in 10 water (irrigation, seepage, and drainage) and one sediment subsamples. However, the whole genome sequencing of these samples did not match the outbreak strain.

    Although a conclusive root cause could not be identified, several potential contributing factors to the 2020 red onion outbreak were identified, including a leading hypothesis that contaminated irrigation water used in a growing field in Holtville, CA may have led to contamination of the onions.

    In light of this report, the FDA encourages all farms to:

    • assess growing operations to ensure implementation of appropriate science and risk-based preventive measures, including applicable provisions of the FDA Food Safety Modernization Act (FSMA) Produce Safety Rule and good agricultural practices;
    • implement industry-led root-cause analyses to determine how the contamination likely occurred when pathogens are identified through pre-harvest or post-harvest testing of produce, or microbiological surveys;
    • be aware of and consider the risks that may be posed by adjacent and nearby land uses, especially as it relates to the presence of livestock and the interface between farmland, rangeland, irrigation water, and other agricultural areas;
    • consider additional tools such as pre-harvest and/or post-harvest sampling and testing of products to help inform the risk assessment and clarify the need for specific prevention measures; and
    • improve traceability by increasing digitization, interoperability and standardization of traceability records; and
    • follow good agricultural practices to maintain and protect the quality of water sources.

    Thomson International Inc. cooperated with the FDA throughout the investigation and is continuing to engage with the FDA on the agency’s findings and recommendations.

    Food safety is a shared responsibility that involves food producers, distributors, manufacturers, retailers, and regulators. Recognizing the interconnection between people, animals, plants, and their shared environment when it comes to public health outcomes, we encourage collaboration among various groups in the broader agricultural community (i.e. livestock owners and produce growers, state government and academia) to address this issue. The FDA is committed to working with these stakeholders to advance critical work.

    For More Information:

  • Effective Non-chemical Soil Fumigants for Organic Production

    The Organic Center — Soil fumigants that fight soil-borne diseases and ensure crop production continue to be banned to protect the health and safety of rural communities. Organic farmers and conventional farmers who can no longer use these chemical tools need effective alternatives to protect their yields. A recent study published in the journal Agronomy(link is external) demonstrates that a non-chemical alternative can be effective and affordable if farmers receive a high enough price for their crops. Until 2016, Methyl Bromide had been used in California for decades as a soil fumigant to disinfest soils of devastating diseases before planting high-value crops such as strawberries. Methyl Bromide was never permitted for use in organic farming, and its recent ban due to public health safety concerns also left conventional farmers without an important disease control tool. The ban has prompted much research into alternatives to chemical soil fumigants such as steam, solarization, and anaerobic soil disinfestation (ASD) using rice bran or mustard seed meal. While many studies are optimizing the effectiveness of these strategies, a missing key component is the consideration of the economic cost of these alternatives. This study took a comprehensive approach, and measured the effectiveness and affordability of two alternative management strategies to chemical soil disinfestation for strawberries produced under conventional and organic management.

    The results show that organic-approved methods of soil disinfestation (steam and steam plus mustard seed meal) resulted in better yields compared to the control for both conventional and organic systems. And when the cost of treatment is considered, along with yield and crop value, organic far out-competes conventional management. In this study, organic yields were greater than conventional, which helped better cover the high cost of soil treatment. The higher price premium earned for organic strawberries even further enhanced the affordability of the soil treatment for organic management. This study shows that a non-chemical method of managing devastating soil diseases is effective and affordable, but only if the farmer receives a high enough price to cover the added expense. This study brings up an important consideration: when we ask farmers to use practices that benefit not just their own production, but also their surrounding environment which improves public and environmental health of rural communities, it’s clear that the farmers need financial assistance to make the safer choice.

  • FDA to Implement Sampling Effort for Lettuce Grown in Salinas

    The U.S. Food and Drug Administration will be collecting and testing samples of lettuce grown in California’s Salinas Valley from local commercial coolers from May through November 2021. The agency will test the samples for Shiga toxin-producing Escherichia coli (STEC), including E. coli O157:H7, and Salmonella spp. as part of ongoing surveillance efforts following reoccurring outbreaks linked to this region, including most recently in the fall of 2020.

    The FDA assignment will direct sampling to be conducted at commercial cooling and cold storage facilities where field heat is removed from harvested lettuce and where product is cold-stored before processing. Sampling may include pre-cooled product (preferred) or post-cooled product. Sample collection at commercial coolers helps the FDA efficiently obtain samples from multiple farms at centralized locations and facilitates prompt traceback and follow-up if contamination is detected.

    The agency plans to collect and test a total of approximately 500 post-harvest samples of iceberg, leaf and romaine lettuce. Each sample will consist of 10 subsamples, each made up of one head of lettuce (trimmed, cored and possibly wrapped), or in the case of romaine lettuce, loose leaves or one package of hearts.  FDA laboratories will conduct all testing.

    During this sampling assignment, the FDA will take extra precautions to help ensure the safety of agency investigators and firm employees during the COVID-19 pandemic. FDA investigators will preannounce their visits to firms per the Agency’s COVID-19 safety practices. They will be outfitted with personal protective equipment (PPE) and will carry out their work while adhering to local, state and applicable CDC guidance.

    Helping to ensure the safety of leafy greens remains a high priority of the FDA. This assignment adds to other work underway in collaboration with stakeholders in the California Central Coast growing region to identify where the recurring strain of pathogenic E. coli is persisting and the likely routes of leafy green contamination with STECs.  This includes continued implementation of actions identified in the recently updated Leafy Greens Action Plan, including a multi-year longitudinal  study to assess the environmental factors impacting the presence of foodborne pathogens in this region. Consistent with the action plan, if the FDA detects a pathogen such as E. coli O157:H7, the agency will conduct a follow-up investigation to identify potential sources and routes of contamination. Such investigations are designed to inform what additional preventive measures may be needed to help prevent outbreaks of foodborne illness.

  • Fusarium Wilt of Watermelon 2021

    Last year we had a lot of watermelon fields infected with Fusarium from Winterhaven to Yuma, Wellton, and Mohawk Valley. Rain, and overwatering of fields when plants set fruits might have contributed to the disease development.

    Fusarium wilt of watermelon, caused by Fusarium oxysporum f. sp. niveum, is one of the oldest described Fusarium wilt diseases and the most economically important disease of watermelon worldwide. It occurs on every continent except Antarctica and new races of the pathogen continue to impact production in many areas around the world. Long-term survival of the pathogen in the soil and the evolution of new races make management of Fusarium wilt difficult.

    Symptoms of Fusarium can sometimes be confused with water deficiency, even though there is plenty of water in the field. In Yuma valley we have seen fusarium problem in some overwatered fields.

    Initial symptoms often include a dull, gray green appearance of leaves that precedes a loss of turgor pressure and wilting.  Wilting is followed by a yellowing of the leaves and finally necrosis.  The wilting generally starts with the older leaves and progresses to the younger foliage. Under conditions of high inoculum density or a very susceptible host, the entire plant may wilt and die within a short time.  Affected plants that do not die are often stunted and have considerably reduced yields.  Under high inoculum pressure, seedlings may damp off as they emerge from the soil.

    Initial infection of seedlings usually occurs from chlamydospores (resting structure) that have overwintered in the soil.  Chlamydospores germinate and produce infection hyphae that penetrate the root cortex, often where the lateral roots emerge.  Infection may be enhanced by wounds or damage to the roots.  The fungus colonizes the root cortex and soon invades the xylem tissue, where it produces more mycelia and microconidia.  Consequently, the fungus becomes systemic and often can be isolated from tissue well away from the roots. The vascular damage we see in the roots is the defense mechanism of the plant to impede the movement of pathogen.

    Disease management include planting clean seeds/transplants, use of resistant cultivars, crop rotation, soil fumigation, soil solarization, grafting, biological control. An integrated approach utilizing two or more methods is required for successful disease management. — By Bindu Poudel, University of Arizona Extension

  • Summer Sanitation is Important as Ever

    It is never too early to start planning for next produce season, particularly with the threat of Impatiens Necrotic Sprot Virus (INSV) looming. As many of you know, INSV was found in several Yuma locations this spring, particularly in the Tacna area. Overall, INSV incidence was very low (~1% incidence), but there were a few fields where incidence was estimates at > 25% (see Chart 1 below).

    With desert lettuce production now finished, the question remains; will INSV in these infested areas survive the summer in the absence of lettuce. Of course, this depends on the availability of host plants in the cropping landscape to serve as reservoirs for INSV in the next 4 months, as well as the abundance of western flower thrips on these hosts. A team of applied scientists at the UA Yuma Ag Center –Bindu Poudel, Stephanie Slinski, Barry Tickes, Marco Pena and myself (with the assistance of Daniel Hasegawa, USDA-Salinas) – are currently trying to determine this.  First, we know that many of the common weeds currently found in drainages, field borders, and ditch banks serve as reproductive hosts for western flower thrips.  What this means is that thrips are capable of colonizing these weed hosts. Immigrating adults can transmit viruses and larvae can acquire viruses that can be transmitted after they emerge as adults. Recent areawide monitoring of crops and weeds in Tacna and Yuma Valley showed thrips adults and larvae were abundant on nettle leaf goosefoot and cheeseweed (see Chart 2 below), and more importantly, tissue samples recently collected from weeds near previously infected lettuce fields in Tacna tested positive for INSV in nettleleaf goosefoot, cheeseweed, and purslane.   It appears that these weeds could provide a green bridge for the virus and the vector from now till September. The threat of INSV surviving within our desert cropping system in the absence of lettuce this summer is real.

    So, weed management this summer is going to be very important if we hope to eliminate the local presence and spread of INSV.  Growers should be extremely vigilant in keeping ditch banks and low-lying drainages adjacent to fields free of weeds. When upcoming wheat harvests are completed, all weeds along field edges need to be thoroughly disked under along with the stubble.  Even a few remaining goosefoot or purslane plants on a field edge can potentially harbor INSV and a significant number of thrips vectors. Similarly, periodic disking of alfalfa borders and field edges should help minimize weed regrowth.  Same goes for cotton and Sudan grass fields. When spring melons are harvested, growers should promptly disk under plant residue.  Any PCA watching melons this spring can attest to the attractiveness of melon flowers to thrips. Finally, as growers start to flat water fields in preparation for fall lettuce planting, it will be as important as ever to promptly control weeds emerging in those fallow blocks. Remember, recent weed sampling showed purslane tested positive for INSV, and a ten-acre field infested with purslane can potentially generate a lot of thrips. So can volunteer melons.  Thus, summer sanitation is as important as ever. Bottom line:  anything growers can do to reduce weed abundance in and around their fields can only help. For more information on this crop sanitation, please visit Weed Interference with Insect Management in Desert Crops.  The other critical question we are working on is whether our summer crops (alfalfa, cotton, melons) serve as hosts and reservoirs for INSV. We do not know yet, but our team is working on it.  We’ll let you know when we know. — John Palumbo, University of Arizona Extension

  • Ag Order 4.0 Finalized: Implications for Nitrogen Management of Central Coast Vegetables

    On April 15th, the Central Coast Regional Water Quality Control Board (CCRWQCB) finalized and approved Ag Order 4.0. The new rulings affect several aspects of agricultural production such as buffer areas and discharge of pesticides to water ways. In this article we will focus on the impacts of Ag Order 4.0 on the use of nitrogen (N) fertilizers.

    New targets and limits on the use of N fertilizer are calculated using the A minus R metric. In this scenario, “A” is N applied to the crop in the form of fertilizer (Afertilizer), N in irrigation water (Airrigation), N supplied by compost (Acompost) and N mineralized from organic fertilizer (Aorganic fertilizer). “R” is N removed from the field by the crop (Rharvest), scavenged during the winter fallow by cover crops or immobilized by high-carbon compost (Rscavenge), N removed by denitrification bioreactors (Rtreated), N sequestered in woody plant biomass (Rsequestered), or other unspecified forms of N removal from fields (Rother). Although AgOrder 4.0 outlines 3 pathways to compliance, pathway 1 is most likely the one that most ranches would use unless the wells have very high nitrate-N concentrations (> 40 ppm N).  A – R is not to exceed the targets or limits shown in Table 1 for pathway 1 compliance. The A-R is calculated over the growing season on a land acre basis. If two or more crops are grown on the same physical acre, each crop contributes to the value for the year. Below is a discussion of each component of the A-R metric.

    The “A” side of the equation:

    Afertilizer is the amount of N fertilizer added to grow the crop. The actual units of N in lbs/A are used in this calculation.

    Airrigation is the amount of N contained in the irrigation water that is taken up by the crop. For most vegetable and berry crops grown on the central coast the volume of water that must be accounted for in this calculation is equivalent to the volume used by the crop for evapotranspiration (ET).  For crops where less water is applied than ET, the volume of applied water can be used in the calculation.  To calculate Airrigation use the equation:

    Airrigation = water volume (inches) x nitrate-N concentration of water (ppm N) x 0.227

    The factor 0.227 converts the units inches x ppm N to lbs of N/acre.

    For example, if a lettuce crop uses 7.3 inches for ET, and is irrigated with water that has a 37 ppm N concentration, the Airrigation would be:

     7.3 inches x 37 ppm N x 0.227 = 61 lbs N/acre

    Acompost is the amount of N provided by compost. Given that the amount of N that is mineralized by the compost depends on the carbon to nitrogen (C:N) ratio not all the N in the compost becomes available. This fact is recognized in the Ag Order as follows:

    For compost with a C:N ratio of <11, the amount of N in the compost is multiplied by 0.10, and for composts with a C:N ratio of >11 the amount of N in the compost is multiplied by 0.05. Only this amount of N is added to the A side of the equation. These discount factors were an important change made by the Regional Board staff to reflect the actual quantity of N provided by compost and to avoid a disincentive to the use of composts, a key soil health practice.

    Aorganic fertilizer is the amount of N that is mineralized during the cropping system. The amount of N mineralized depends upon the C:N ratio of the material and the CCRWQCB is using the regression curve in a recent paper published by Lazicki et al (2020) to determine the amount of N mineralized. For instance, a material like 4-4-2 has a C:N ratio of 7.3 (29% C/4% N) and has a discount factor of 0.39 (Table MRP-3 in Attachment B). This means that if 100 units of N are applied as 4-4-2, the amount mineralized from this material and that is attributed to the A side of the equation is 39 lbs/A (100 lbs x 0.39). This discount factor acknowledges the fact that not all N in organic fertilizer mineralizes during the cropping season and was an important correction made to Ag Order 4.0.

     The “R” side of the equation:

    Rharvest is the amount of N that is removed from the field in the harvested product. The amount of N removed in the harvested product is calculated by a removal coefficient composed of the percent moisture multiplied by the percent N of the crop. This coefficient is then multiplied by the net pounds of product harvested from a field to determine lbs N/A removed. We have been working on a project developing N removal coefficients for a number of vegetable commodities. Table 2 shows data for full term romaine lettuce. Note that percent solids and nitrogen values observed in our evaluations vary significantly and that the mean value has a notable degree of variability which affects the estimate of N removed by the crop. Regardless of the variability, the important point to recognize is that the removed N is modest in relation to the amount of N applied. Figure 1 shows total fertilizer N to lettuce for a large number of vegetable operations in our area. It becomes evident that growers face some major challenges in complying with the application limits as the limits ratchet down over the next several years.

    Rscavenge is the amount of N that is captured by by cover crops or immobilized by high-carbon compost during the winter fallow period. The CCRWQCB agreed to credit non-legume winter cover crops with 97% of their N content that meet the following criteria: 1) are grown for ≥ 90 days during the winter fallow period, 2) accumulate more than 4,500 lbs/acre of dry biomass and 3) have a C:N ratio of ≥ 20 when incorporated into the ground. N scavenging credits granted for cover crops are helpful, but do not remove any of the current logistical barriers to using of cover crops in intensive vegetable systems. However, given that non-legume cover crops routinely contain 100 to 150+ lbs N/acre, as N application limits ratchet down, cover crop use may be incentivized to some degree.

    High-carbon composts were also included in the Rscavenge category. This practice is still being researched to fully understand how  much N can be immobilized.  Growers already use compost (typical C:N ratio of 10-12) but could substitute high-carbon compost (C:N ratio of >30) which can quickly facilitate its use. Currently, high-carbon compost has been granted a credit of 30 lbs N/acre in Ag Order 4.0. However, once the research on this practice is completed, this practice may be granted greater credits as warranted on the R side of the equation.

    Rtreat is the quantity of N removed from tile drainage  and irrigation runoff by denitrification bioreactors or constructed wetlands. This practice can be implemented in the northern part of Monterey County where high nitrate tile drain water impacts the surrounding sloughs and creeks.  The bioreactors vary in size and sophistication, from sunken beds filled with wood chips to highly engineered portable treatment systems.

    Rsequestered is the quantity of N that is captured in the woody plant tissue of perennial crops. This form of N removal is relevant to vineyards and orchards in our area and does not impact the vegetable industry.

    Rother is the quantity of N removed from the field in other, unspecified ways. One form of N removal not addressed in Ag Order 4.0 is the gaseous loss of N by denitrification from soil. This is a topic that needs further research. Two studies done on the Central Coast showed that in sandy soils with drip irrigation, there is little nitrous oxide or dinitrogen loss (2-4 lbs N/acre/crop). However, an earlier study of celery and lettuce production fields in the 1980s showed that on heavier soil with furrow irrigation gaseous N losses ranged from 18 to 37 lbs N/acre. Further research is needed to understand denitrification rates more fully in coastal vegetable production.

    What options does the industry have moving forward?

    Basically, a timer has been started by Ag Order 4.0. The first dates are targets of 500 lbs N/acre/year 2 years from now and 400 lbs N/acre/year in 2025 (four years). Starting in 2027 the targets become limits ratcheting down to 300 lbs N/acre/year. In scenarios that we and others have run, the 300 lbs N/acre/year limit will become very challenging for growers to comply with in typical double cropped production. There are basically three key practices that will provide the most improvements in N use efficiency: 1) measuring residual soil nitrate and adjusting fertilizer applications accordingly, 2) accounting for the nitrate in irrigation water as part of the N budget, and 3) improving irrigation efficiency to help maintain residual soil nitrate in the active rootzone of crops. A concerted focus on these three practices will require a commitment from the decision makers at each farming operation. Farming operations have differed in their approach to the pending water quality regulations. Some have taken a proactive approach and are farther along on the learning curve. It is important to make attempts to begin implementing these practices and see what is possible for your operation given the crop mix, soil types, and nitrate levels in the irrigation water. The good news is that there is still time. To begin implementing these practices, it is important to start small to gain the needed knowledge base in efficient N and water management practices. Working with knowledgeable people will be essential.

     Other options that can help fine tune fertilizer applications and reduce the risk of cutting fertilizer rates are various nitrogen technologies such as nitrification inhibitors and controlled release fertilizers. In studies that we have done, there is clearly a benefit to the use of some of these materials, but again, there is a learning curve to obtaining the benefits that they can provide. Nitrapyrin (a nitrification inhibitor commonly used in the corn belt) was registered on lettuce and brassicas in 2019 and has not been widely used yet by the industry, but it along with other materials, deserves greater evaluation.

    In summary, the finalization of Ag Order 4.0 will have a significant impact on how vegetables are grown on the Central Coast in the coming years. There is a window of opportunity to begin to experiment on how to address limits that will be applied to the use of N fertilizers. Now is the time to make the decisions needed to address this new reality.  Please do not hesitate to reach out to us for help or advice. — By Richard Smith & Michael Cahn, UC Cooperative Extension

  • Research Helps Develop High-Yielding, Drought Tolerant Lines of Chickpea

    Chickpeas are a very important crop and food in India. They are used almost every day in meals and snacks. India is the largest producer, consumer, and importer of chickpeas. And with good reason — they are high in protein, fiber, and vitamins and minerals.

    While India grows about 12 million tons of chickpeas each year, the national yield of the crop has not increased much over time. However, the need for more chickpeas to feed the increasing population continues to grow.

    This is why a group of researchers across several research institutions in India are working to develop high yielding chickpea varieties. The team recently reported their results in The Plant Genome.

    “High yielding varieties will help small-holder farmers by delivering more produce with an option to increase income,” says Rajeev Varshney, member of the Crop Science Society of America. “It is important to develop better varieties that are tolerant to drought and are able to meet the demand.”

    Rajeev Varshney, a research program director at the International Crops Research Institute for the Semi-Arid Tropics, examines a chickpea crop (Credit: ICRISAT)

    Over time, chickpea production has moved from northern India to the central and southern parts of the country, where there is less water. This is in addition to climate change impacting global agriculture.

    Varshney and his collaborators set out to breed new varieties of chickpeas with drought tolerance and higher yields. They used genetic techniques to breed several traits for drought tolerance. They focused on popular chickpea varieties already grown by farmers.

    The team used a common method called introgression, where a popular variety is crossed with a variety with the desired traits. Following a series of evaluations and repeated crossings, the breeders arrived at an improved chickpea variety with the desired traits.

    “However, this conventional process is not very precise, and in this procedure, breeders need to screen a large number of plants in field conditions,” Varshney explains. “For example, if there is a lot of rain in that season, breeders cannot select the line for drought tolerance. It ruins the whole experiment.”

    To combat this, the researchers used a technique called marker-assisted backcrossing. It uses laboratory techniques to detect a genetic marker. Genetic markers are DNA segments associated with certain plant characteristics or agronomic traits desired by farmers.

    By being able to detect certain plant characteristics in the lab using genetic markers, there is no need to do lots of testing every year in the field. It makes the breeding process precise, fast, and cost-effective.

    The work helped incorporate drought tolerance into three popular varieties of chickpeas. Overall, researchers developed six lines of chickpea with higher yields under drought conditions. One line, Pusa Chickpea 10216, has been released for use by Indian farmers.

    “We worked with already released elite varieties that are preferred by farmers,” Varshney says. “By improving these, it’s more likely they will be adopted by farmers in a faster manner.”

    “Here we have demonstrated successful use of using genetic markers to develop drought tolerant chickpea varieties,” Varshney says. “We would like to see this kind of breeding being deployed by our national partners at a large scale in India, Ethiopia, Kenya, Tanzania, and elsewhere.”

    This research shows the public benefits of this kind of genetic research. Maintaining strong public support and funding for the research pipeline allows such work to take place.

    “The work shows how genomics research can be used to develop better high-yielding drought tolerant varieties,” Varshney says.

    Rajeev Varshney is a research program director at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) and Adjunct Professor with Murdoch University (Australia). Support for this research was provided by the Government of India through its Department of Biotechnology in the Ministry of Science and Technology, Department of Agriculture, Cooperation & Farmers Welfare in the Ministry of Agriculture & Farmers Welfare, and the Bill & Melinda Gates Foundation.

    Flowers are incredibly striking when in full bloom (Photo by L. Vidyasagar)

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