UC Agriculture & Natural Resources News
Alan Wilcox of Wilcox Agri-Products and UC Cooperative Extension specialist Jeff Mitchell debated the challenges and opportunities for increased implementation of conservation tillage practices on California farms during the World Ag Expo in February, reported Alan Stenum in Farm Equipment magazine.
Wilcox said farmers are going to be resistant to anything they suspect will affect yield. Mitchell said creative innovation underway will have a big impact on some of the more challenging crops that are grown in California.
"This is a region where costs are high. The cost of doing business is high, and maximum yields on any crop are important to even break even," Wilcox said. "We're going to be intensely committed to water management and the maximum amount of water."
Mitchell said farmers in other parts of the U.S. started to switch to reduced disturbance no-till systems to conserve water.
"The recognition of the value of that opportunity to reduce soil water evaporation and have more water going through the crops through transpiration hasn't really sunk in here in California in large fashion," Mitchell said.
While Mitchell noted that water is essential to the discussion of conservation agriculture, there are other important aspects to consider.
"Biological cycling of nutrients in the soil, tightening up the system so there are fewer losses, either to the groundwater as some sort of pollution, or improving the overall soil function and nutrition provision capacity of the soil - that's not a small aspect of the overall system, nor are the opportunities for reducing costs," Mitchell said.
Wilcox said he would characterize the argument differently.
"The point is in all of our tillage strategies - and in every situation - we never compromise yield," he said.
Read the complete debate in Farm Equipment magazine.
More information about the use of conservation agriculture practices can be found on the UC Conservation Agriculture Systems Innovation website.
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One-third of the world's food is spoiled or tossed rather than eaten, a fact that is tragic when nearly one billion people go hungry. The injustice of food waste is worsened by the fact that food decomposing in landfills emits greenhouse gases that contribute to climate change.
The conventional management of municipal waste in landfills places discarded food and plant matter into an anaerobic environment, initiating a chemical reaction that turns biomass into biogas – specifically methane, a greenhouse gas that's 28 times more potent than carbon dioxide.
Reducing the volume of the California waste stream and reducing the emission of greenhouse gases into the atmosphere are objectives that have spurred state lawmakers to enact regulations, such as Assembly Bill 939, which in 1985 mandated a 50 percent diversion of solid waste away from landfills. A 1989 update to the law also required municipalities to reach out to residents with training on greenwaste etiquette and waste diversion.
UC Cooperative Extension is working closely with the cities and county of Santa Clara in a far-reaching program to divert organic matter – food and green waste – from landfills by composting and using the product to enrich soil in the home garden.
In early June, UC Master Composter Don Krafft conducted a class on composting in a Palo Alto community center, one of 22 sessions to be offered in the spring and summer of 2018. A retired telecommunications professional, Krafft's interest in composting stemmed from his work as a Master Gardener for UC Cooperative Extension.
“I live in a townhouse, so I do worm composting. The No. 1 reason,” Krafft said, “is because it's fun.”
The composting workshops are just one component of the UC Cooperative Extension's composting efforts in Santa Clara County, led by UCCE staff research associate Cole Smith. The Environmental Protection Agency has a food recovery hierarchy, he said, which has source reduction at the top, followed by feeding the hungry, feeding animals, industrial uses, then composting, and finally delivery to a landfill.
“By diverting and recycling at the source, we reduce the diesel footprint for hauling,” Smith said. “We want to tighten the nutrient loop and the backyard is the closest place.”
The classic composting technique involves layering “browns” – dry leaves, sawdust, woody cuttings, straw, shredded newspaper and cardboard – with “greens” – grass clippings, food scraps, coffee grounds, egg shells, green plant cuttings and manure.
“Start and end with browns to keep the fruit flies down,” Krafft said. “It's like making lasagna.”
Certain foods should not be added to the home compost heap – including meat, whole eggs and dairy products.
The mix of greens and browns should be maintained evenly moist, but not soaked, and turned at regular intervals, the more often, the faster the materials decompose.
“Maintenance is completely adaptable. You can do a lot or a little and it gets easier with time,” Krafft assured the audience.
The compost is ready when the components are no longer recognizable and the pile is cold. Once composted, the former waste becomes a stable soil amendment with a pleasant earthy smell. It's then ready to be applied in the garden.
UCCE Santa Clara has also developed a three-acre composting demonstration site at Martial Cottle Park in San Jose, where volunteers are composting animal waste generated by the 4-H animal program in a project made possible by a grant from the Santa Clara Valley Water District.
The facility includes a variety of commercial and homemade compost containers, including one built by a volunteer that employs bicycle power to mix compost.
The issue of food waste is capturing significant attention not only in Santa Clara County and not only in the garden. Food waste reaches across multiple disciplines, including agriculture, environment, and public health, key areas of UC Agriculture and Natural Resources' efforts.
“Food waste is a symptom of our food systems and food practices going astray,” said Wendi Gosliner, a project scientist in the UC ANR Nutrition Policy Institute, co-founder of California Food Waste Prevention Week, which was held for the first time in March 2018.
“Addressing the issue requires researchers, practitioners, policy makers, communities and individuals to innovate and develop new solutions,” Gosliner said.
UC ANR programs that have a hand in food waste prevention include:
- Nutrition education programs – UC CalFresh and the Expanded Food and Nutrition Education Program – which teach families how to eat right and economize
- The UC Master Food Preserver Program, which offers training on canning, freezing, drying, fermenting and other techniques to preserve a summertime food bounty to eat later
- The 4-H Youth Development program, which trains youth in recycling and is providing animal manure for the Santa Clara compost demonstration site
- The UC Master Gardener Program, which endorses the use of homemade compost
- Nutrition Policy Institute, which conducts research that informs nutrition policy and programs for healthy children, families and communities
“UC ANR translates research to practice in helping communities manage food resources, learn to preserve food and compost – all parts of the food waste solution,” Gosliner said. “Thinking about these and other UC ANR activities under the umbrella of food waste prevention can help to better nourish people, protect the environment and conserve human, natural and financial resources.
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