Growers of organic vegetables and strawberries across California are invited to attend an online training to learn how to manage nitrogen fertilization. UC Cooperative Extension is offering the three-part Nitrogen Planning and Management in Organic Production of Annual Crops Workshop on Nov. 29, Dec. 5 and Dec. 12.
Growers, certified crop advisers, pest control advisers and other agricultural professionals who are interested in learning about nitrogen management in organically farmed crops are encouraged to enroll.
The workshop is also available in Spanish.
Tuesday, Nov. 29, 1-3 p.m. – Part 1: Understanding nitrogen: the nutrient, the role of microbes and the relevance of soil organic matter. Daniel Geisseler, UC Cooperative Extension specialist in nutrient management at UC Davis; Radomir Schmidt, program manager for the Working Lands Innovation Center at the UC Davis Institute of the Environment; and Margaret Lloyd, UCCE small farms advisor will give an overview of the sources, transformations and fates of nitrogen in soil. They also will discuss the role and dynamics of microbes in nitrogen management, and how nitrogen fixation impacts management decisions.
Monday, Dec. 5, 1-3 p.m. – Part 2: Estimating nitrogen release from organic amendments and contributions from cover crops. Patricia Lazicki, a postdoctoral research associate at the University of Tennessee, Knoxville, and Lloyd will discuss estimating nitrogen release from compost, organic fertilizers, cover crops and crop residue and irrigation water.
Monday Dec. 12, 1-3 p.m. – Part 3: Putting it all together: Completing a nitrogen budget, synchronizing nitrogen release with nitrogen demand, and using soil tests. Joji Muramoto, UC Cooperative Extension organic production specialist; Richard Smith, UC Cooperative Extension vegetable crops advisor; and Lloyd will address nuances of organic soil fertility management in vegetables. Discussions will include crop nitrogen demand and strategies to supply demand, as well as using and interpreting soil testing. Specific references will be made to strategies for complying with forthcoming regulations. The session will conclude with a discussion on new frontiers in organic nitrogen management.
Registration for the virtual event is $25 and includes all three classes. A single registration can be shared by members of the same farm. Space is limited to 75 participants. To register, visit https://ucanr.edu/organiccrops22.
Participants may earn six hours of CDFA-INMTP continuing education credits (formerly CURES CE Credits) or six hours of CCA credits.
For more information, contact Margaret Lloyd at (530) 564-8642 or mglloyd@ucanr.edu.
UC Agriculture and Natural Resources brings the power of UC to all 58 California counties. Through research and Cooperative Extension in agriculture, natural resources, nutrition,economic and youth development, our mission is to improve the lives of all Californians. Learn more at ucanr.eduand support our work at donate.ucanr.edu.
Davis, Calif., (February 23, 2018) – Hedgerows enhance wildlife abundance and diversity around farmland without contributing to food safety problems in field crops, according to a new study published by a team of University of California researchers. The UC Agriculture and Natural Resources and UC Davis study documented that field edge plantings around farms are generally too narrow relative to the surrounding landscape to be a source of rodents and foodborne pathogens.
“This study is particularly pertinent right now when FDA’s Food Safety Modernization Act (FSMA) is calling for farmers to co-manage wildlife and agriculture, instead of clear cutting wild habitat around their crops,” said co-author Rachael Long, UC Cooperative Extension farm advisor in the Sacramento Valley. “Our paper provides support for this ruling, showing that the presence of hedgerows does increase wildlife diversity, but does not increase wildlife intrusion into the fields and, more importantly, does not increase the prevalence of animals carrying foodborne pathogens.”
This is good news for hedgerows, rows of shrubs, trees, grasses and flowers that are planted on field edges. The plants bordering crop fields provide habitat and floral resources for beneficial insects, such as bees and natural enemies, that help with pollination and biocontrol of pests in adjacent crops. Hedgerows also help enhance biodiversity – especially for insect-eating birds – help reduce wind and soil erosion, and protect water quality.
The two-year study in Sacramento Valley walnut orchards and processing tomato fields was led by Long and Roger Baldwin, UC Cooperative Extension vertebrate pest control specialist at UC Davis, former graduate student Laurel Sellers, the Western Center for Food Safety at UC Davis’s Michele Jay-Russell, Xunde Lib and Edward R. Atwill, and Richard M. Engeman of USDA National Wildlife Research Center.
The study, titled “Impact of field-edge habitat on mammalian wildlife abundance, distribution, and vectored foodborne pathogens in adjacent crops,” was published in the February 2018 Crop Protection (Sellers et al. 2018).
Elsevier is providing 50 days of free access to this article. Anyone clicking on the following link before March 31, 2018, will be taken directly to the article on ScienceDirect. No signup or registration or fees are required. Simply click and read at https://authors.elsevier.com/c/1WXU~xPFYej~4.
Winter migratory birds like to eat the lovely red berries of toyon.
This journal article supports a growing body of literature suggesting that plantings along the edge of fields do not substantially attract wildlife species that intrude on fields and transfer foodborne pathogens. For example, in a 2015 study, UC Davis researchers found more food pathogens when wildlife habitat was reduced on farms. This may be attributed to the vegetation filtering pathogens, a better breakdown of pathogens in diverse environments, and that removing vegetation may not deter wildlife from entering farm fields.
Relative to the larger crop acreage, hedgerows and similar field-edge habitats are generally too linear and small to serve as a significant source of rodents to damage nearby crops. However, cottontail rabbits favor hedgerows, and can sometimes cause damage to adjacent seedling crops.
“Overall, we found risk of crop loss or contamination of foodborne pathogens in crops bordered by hedgerows wasn’t significant in our study in the Sacramento Valley, although potential damage could vary by the sta ge and type of crop and wildlife species present,” Long said. She will be presenting this work at the 28th Vertebrate Pest Control Conference, which will be held in Rohnert Park Feb. 26 to March 1.
Hedgerows, the plants bordering this field of processing tomatoes, provide habitat and floral resources for beneficial insects that help pollinate crops and provide natural control of pests.
Sacramento, Calif., (January 23, 2018) – A rigorous field study in two California climate zones has found that alfalfa can tolerate very heavy winter flooding for groundwater recharge. The research was published online Jan. 16 in California Agriculture journal.
Flooding an alfalfa field for groundwater recharge. (Photo: Andrew Brown)
The alfalfa research is the latest in a series of projects studying the effects of using land planted with permanent crops – including almond orchards and vineyards – to capture and bank winter storm water. Such projects have great promise but also require collaboration across multiple jurisdictions and agencies. UC Agriculture and Natural Resources vice president Glenda Humiston has made groundwater recharge on working lands and open spaces a division priority and is working with water and land use leaders around the state to facilitate it through policy recommendations and cross-agency collaboration.
Groundwater is a critical water reserve in California, particularly during droughts when surface water supplies are low. Water slowly filled California’s aquifers over tens of thousands of years. Beginning in the early 20th century and continuing in the present day, groundwater has been consistently withdrawn at a higher rate that it can be replenished naturally. In 2014, the California Legislature enacted the Sustainable Groundwater Management Act, which requires all critically overdrafted groundwater basins to have a groundwater sustainability plan in place by 2020.
Flooding agricultural land during the winter, when surplus surface water is often available, is one promising strategy for replenishing overdrafted aquifers.
View a four-minute video about on-farm flooding for groundwater recharge on the UCTV Sustainable California channel. In the video, Professor Helen Dahlke discusses the work she and her fellow UC Davis researchers, UC Cooperative Extension advisors and specialists, and California farmers are undertaking to test the impacts of irrigating almond orchards in the winter to recharge groundwater.
For the alfalfa flooding research, UC Davis and UC Cooperative Extension scientists flooded two established alfalfa stands, one near Davis and one in the Scott Valley, Siskiyou County, during the winters of 2015 and 2016. The sites were selected because the soils in those areas have relatively high water percolation rates.
Integrated hydrologic science professor Helen Dahlke in an almond orchard being flooded for groundwater recharge.
“We found that most of the applied water percolated to the groundwater table,” wrote lead author Helen Dahlke, integrated hydrologic science professor at UC Davis.
The alfalfa endured saturated conditions in the root zone for a short time, but the yield loss was minimal.
Dahlke and her co-authors – USDA Natural Resources Conservation Service soil scientist Andrew Brown, and UC Cooperative Extension specialists Dan Putnam and Toby O’Geen and the late UCCE advisor Steve Orloff – noted that the positive results of the alfalfa trial show tremendous potential for the state’s groundwater basins. Using an index created by O’Geen that identifies the locations of California soils suitable for on-farm groundwater recharge, the scientists calculated the potential groundwater recharge. If all the suitable alfalfa acreage were flooded with six feet of winter water, and assuming 90 percent percolates past the root zone, it would be possible to bank 1.6 million ac-ft. of groundwater per year.
“For reference, the Oroville reservoir, second largest in the state, has a storage capacity of 3.5 million ac-ft.,” Dahlke wrote.
Leigh Bernacchi, program coordinator of UC Water at UC Merced, interviewed Helen Dahlke to get more details on groundwater recharge strategies for California. Read the Q&A on the UC Water Center website.
Davis, Calif., (August 16, 2017) – In today’s food system, large scale food distribution has become the standard way food moves from farm to market. The system works well to feed a lot of people, and has allowed us to eat tomatoes in December and send produce far distances while keeping it fresh. But the system is not without its sacrifices.
Through large scale food distribution, farmers can lose the ability to set their own prices, and small-scale farmers can be cut out from the system for not being able to fill high volume orders. On the consumer side, this system can make local food harder to find and identify. Institutions interested in providing locally grown produce at their cafeterias may need the efficiency buying from large distributors provides, but find they’re unable to source food the way they’d like.
Food hubs are businesses popping up around California and the U.S. trying to create a food distribution system that supports regional food systems. By aggregating food from small and mid-sized farms and selling it to large businesses and institutions, food hubs are able to help realize the consumer’s desire for local food while helping small and mid-sized farmers succeed by connecting them with buyers who may otherwise be out of reach.
What is a Food Hub? #Collabatition
To help ease the challenge of starting these unique businesses, a network of food hubs in California, organized by the UC Sustainable Agriculture Research and Education Program, is learning how to conquer their business start-up and growth challenges together.
Thomas Nelson, president and co-founder of Capay Valley Farm Shop, a food hub in California’s Capay Valley, has built his business around a vision of a thriving regional food system where small farmers succeed. Thomas purchases food from 50 different farms in and near the Capay Valley, and sells primarily to corporate food service in the Bay Area.
Boxes of melons loaded into Capay Valley Farm Shop’s truck, headed for buyers in the Bay Area.
“Our model is farmer-focused,” Thomas said. “Farmers set the price for their food, and we add on our margin. We help tell the story of the farms so that their identity is kept throughout the supply chain. We let our buyers know about new products or new farms we’re working with, and our buyers ask for produce by farm name.”
Thomas works closely with his 50 farmers, helping them plan their crops to best meet the demands of their clients, and working with the beginning farmers to get them through the hurdle of learning how to sell wholesale.
“It can be a challenge to accurately predict the next harvest,” Thomas said. “And it’s our responsibility to mitigate some of those risks for the buyers as much as possible, but our buyers also get it. The reason they choose to work with the food hubs is they want to support local farms. What really makes this work are shared values.”
Thomas is one member of a new statewide food hubs network created in collaboration with the UC Sustainable Agriculture Research and Education Program (UC SAREP), a statewide program of UC Agriculture and Natural Resources whose work includes improving marketing opportunities for small farmers. The network, funded in part by the UC Global Food Initiative, brings together food hub mangers to learn from one another and collectively pave the way for successful food hubs in California.
The food hub business model is a relatively young one, few food hubs existed in the United States before 2008. Today, hundreds are in business across the country, and they’re all trying to figure out similar things: how to best work with farmers and customers to make the business model effective, how to run a food business in a regulation-laden environment, how to increase efficiency without sacrificing price, quality, and the value of local agriculture.
“Food hubs are really working with farmers in their local areas to help them reach markets beyond selling directly at the farmers’ market,” said Gwenaël Engelskirchen, who leads the food hub projects at UC SAREP. “We brought a group of northern California food hubs together for their first convening in February of 2015 and they realized that they all had a lot to learn from each other. They realized that there’s opportunity in them working together.”
There’s a hashtag on Twitter for what they’re doing: #collabatition, or, collaborating with your competition. UC SAREP acts as the organizing body for the food hub network — coordinating resources to help the hubs wade through the many rules and regulations of operating a food business, and working through the visions of their own businesses and the network collectively.
“This is a newish space, so there is a ton to learn and share,” Thomas said. “By having a network we are supporting each other on the journey of growing successful businesses that serve local farms and regional buyers. Working with UC SAREP, we can have conversations with larger buyers that would be hard for us independently to access.”
One of those potential larger buyers is an organization close to home — the kitchens of the University of California.
“UC SAREP plans to interview kitchen directors from UC campuses all around the state to see what keeps them from buying local food, and whether the food hub business model is one that can support the desire they have to incorporate local food into their kitchens,” Gwenaël said.
And past successes show that food hubs can play an important role in linking UC dining programs with local farms. According to a recent report from the UC Global Food Initiative, through a relationship with the food hub Harvest Santa Barbara, UC Santa Barbara is currently able to source 23 percent of its produce from within 150 miles of campus.
“By linking UC food buyers with food hubs, we want to see if that success can be replicated around California,” Gwenaël said. “In 2014, UC Santa Barbara alone served nearly three million meals, so the entire UC becoming a local produce buyer could be a major boon to regional food systems.”
The UC SAREP website offers a number of resources that can assist food hubs as well as farmers looking to see their produce wholesale. Find those resources here. Stay tuned for an upcoming article on food hubs in the next issue of California Agriculture journal.
Sacramento, Calif., (May 3, 2017) – If 4-H has touched your life, raise your hand. Visit http://4-H.org/raiseyourhand to voice your support for the California 4-H youth development program, help it win a national competition, and connect with a network of 4-H alumni and friends.
You are considered alumni if you were in a 4-H Club, took part in a 4-H after-school program, served as a volunteer leader, or taught a project. Friends of 4-H are also invited to raise their hands.
“Having experienced our programs first-hand, our alumni know about the positive impact of 4-H,” said Glenda Humiston, vice president of UC Agriculture and Natural Resources (UC ANR) and a 4-H alumna. UC ANR is the umbrella organization of 4-H in California.
As part of the new 4-H network being built in the 4-H Raise Your Hand campaign, members will get news about 4-H programs in California and stay in touch with a program that made a difference in their lives.
“I’ve raised my hand,” said Humiston, who credits 4-H with helping her become the first in her family to attend college. She later served in the Peace Corps, received a federal appointment from President Obama and now leads the statewide research and outreach arm of UC.
The National 4-H program, which currently empowers nearly 6 million youth across the country, aims to extend its reach to 10 million by 2025. It has launched a competition among states to see which ones can add the most alumni and friends to the network by June 30, 2017. A map showing the current front runners is on the registration page.
“We need the help of all 4-H members, their teachers, leaders and friends to build the California network,” Humiston said. “The prize is $20,000, and if we win, that money will fund California 4-H youth leadership programs.”
Another well-known 4-H alum is Grammy-award winning musician and actress Jennifer Nettles.
“4-H gives kids the opportunity to learn by doing, to grow from not only the encouragements brought by success, but also through challenges and failures,” Nettles said. “These skills will help them to handle whatever life may throw their way.”
The California 4-H youth development program is open to all youth aged 5 through 19 years old. For more information about California 4-H or to join a program, go to http://4H.ucanr.edu.
