Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: Vegetables

Organic farmers and researchers strive to advance soil care

Organic farmer Phil Foster has developed a creative way to nurture the soil on his 200-acre farm near Hollister. He plants cover crops in a single line at the top of the planting bed, saving water and seed while keeping the furrows clear for irrigation.

"We were finding we couldn't use cover crops because of water," Foster said. The narrow strip makes the best use of the limited water supply, while garnering the benefits of cover crops - which buffer soil temperatures, inhibit weeds, increase soil microbial activity, improve water infiltration and add nutrients. Growing cover crops prepares the soil for the production of high-quality vegetables.

Organic farmer Phil Foster stands in front of a field with cover crops planted in strips at the top of the planting bed.

Foster is one of eight organic vegetable growers who are working with researchers at Chico State, Fresno State and UC Agriculture and Natural Resources on a project funded with a USDA grant designed to make significant improvements in soil care in organic production systems. He guided project participants around his farm, equipment yard and compost operation in early November to share the techniques he and his staff have developed over three decades to promote soil health.

Tiny pores and roots can be seen in the soil at the Foster farm.
 
UC Cooperative Extension farm advisor Sarah Light examines a soil sample. The agronomy expert, who serves Yuba, Sutter and Colusa counties, is a cooperator on the project.

Tour participants marveled at the soil characteristics, admiring tiny pores and roots in clods of dirt, evidence of the soil's capacity to move water and nutrients. They studied the plant and soil conditions after farm manager Efrain Contreras pulled a carefully crafted implement for rolling down the cover crop across the field with a tractor. 

Foster credited Contreras, a 30-year employee, for his role in building the soil on the farm. Labor, Foster said, is his biggest cost. He has 50 full time staff, many with 5 to 20 years of experience.

"They are the key to to the success of the ranch," Foster said.

Farm manager Efrain Contreras pulled an implement through a mature cover crop to show how the field can be prepared for planting.

Minimizing and, eventually eliminating, soil disturbance can be combined with organic groundcover, year-round root growth and robust biological activity in the soil to further promote soil health. Following the tour, the farmers talked about ways to attain the goal on their farms of no-till organic vegetable production. 

Foster said he will experiment with reducing soil disturbance to determine whether doing so will maintain or increase yields. Another farmer in the project, Scott Park of Meridian, Calif., 50 miles north of Sacramento, said he will dedicate eight acres of his organic farm to comparing the results when the cover crop is chopped and left on the soil surface to chopped and incorporated with tillage.

Paul Muller and Andrew Braitt of Fully Belly Farm in the Capay Valley suggested the researchers could help the farmers by identifying optimal, effective cover crop rolling techniques. Retired organic farmer Tom Willey of Madera suggested grant funds be used to purchase appropriate scale cover crop seeders for on-farm experimentation.

"We're making great progress," said project coordinator Jeff Mitchell, UC Cooperative Extension vegetable crops specialist. "By getting together regularly, we're seeing opportunities for moving further toward reduced-disturbance on the farms, identifying the equipment needs and establishing effective channels of communication."

Over the project's three-year term, the farmers and researchers will continue to experiment with soil-building techniques and share results.

Andrew Brait of Full Belly Farmers, foreground, looks at roots and nodulation of rhizobia on the cover crop. Kelly Mulville and Esther Park of Paicines Ranch are in the background.

 

A safflower and vetch cover crop growing in the autumn light.

 

Workers, in the background, manually weed the safflower and vetch cover crop.

   

Project coordinator Jeff Mitchell, UC Cooperative Extension vegetable crops specialist, and Phil Foster.
 
UCCE farm advisor Amber Vinches, center with sun glasses, is a cooperator on the project. Vinchesi serves vegetable crop farmers in Colusa, Sutter and Yuba counties.
Posted on Monday, November 26, 2018 at 8:35 AM
Focus Area Tags: Agriculture

Ten tips for vegetable gardening during a drought

Asparagus, chard, eggplant, mustard greens, peppers, roma tomatoes, and California native strawberries are water-efficient edibles. (Photo credit: Jennifer Baumbach, UCCE Master Gardener Coordinator, Solano County)

Is it possible to grow a vegetable garden when water resources are scarce and water rationing could be imposed?  Water responsibly, plant carefully, and select fruit and vegetable varieties that are drought tolerant. All of these sustainable gardening practices require less water – and help ensure your family has access to a variety of nutrient rich foods.

Ten simple drought tips to reduce water use in your backyard garden

  1. Planting time
    Plant earlier in spring and later in fall. Planting earlier in the spring season takes advantage of the warm weather and reduces exposure to high mid-summer temperatures. Planting later in the fall minimizes the use of supplemental water and takes advantage of seasonal rains to establish plants. For example, tomatoes and other nightshade crops such as peppers and eggplants, should not be planted until soil temperatures reach 55 degrees. With a warm spring this could be as early as mid-April.  Remember to always use a soil thermometer for accurate soil temperature readings.
     
  2. Mulch, mulch, mulch!
    A 3- to 4-inch layer of mulch can reduce watering needs by as much as 50 percent. Mulch reduces water evaporation and keeps soil temperatures down during hot summer months.  Grass clippings, dried leaves, pine needles, straw and shredded bark are all examples of natural mulches which can be used to cover the soil. Hay is not recommended because it contains seeds, which yields weeds and can become a problematic option.

    Raised garden beds help retain water better than gardens planted in open soil.
  3. Enclosed spaces 
    Gardens planted in enclosed spaces, for example a raised garden bed, retain water better than gardens planted in open soil.  Plant seeds and transplants in a hexagonal "off-set" pattern rather than in straight rows.  A hexagonal arrangement groups plants closer together, which provides shade from leaves, keeping soil cool and water from evaporating.

  4. Companion planting
    Companion planting is the practice of grouping crops together for mutual benefit. The Native American “three sisters” approach of planting corn, beans and squash together are the perfect example of companion planting. Tall cornstalks provide a structural support for the climbing beans, the beans return nitrogen back into the soil, and the squash spreads across the soil acting as a mulch and keeping the soil cool. 

  5. Watering times
    The best time to water your garden is in the late evening and early morning hours, typically between 9 p.m. and 6 a.m. The cooler morning temperature and limited wind reduced water evaporation rates.

  6. Water efficiently
    Overhead watering with a sprinkler system is not as efficient as drip irrigation. Compared to overhead sprinklers - drip systems can reduce water usage by up to half. Install a drip irrigation system, grouping plants with similar water needs together on one drip irrigation line. Drip irrigation systems are relatively easy to install for most do-it-yourself homeowners.  The UC Division of Agriculture and Natural Resources book Drip Irrigation in the Home Landscape is a great reference on the materials, design and installation of a drip system.
    Select the correct size garden for your family, to reduce waste from overproduction.
  7. Control Weeds! 
    Pesky weeds compete for valuable water, sunshine and soil nutrients in your garden. Remove weeds before they have an opportunity to flower or spread. Visit the UC Integrated Pest Management website for tips on controlling weeds to identify recommendations for specific weed species.

  8. Drought Resistant Crops
    Purchase varieties of fruits and vegetable that do well in hot and dry climates. Many heirloom varieties from Mediterranean regions are prized for being drought tolerant. Smaller varieties bred for containers often produce a more bountiful yield per plant than standard varieties. Avoid water hogs! Some favorite water-efficient edibles from UCCE Master Gardeners include: asparagus, chard, eggplant, mustard greens, peppers, roma tomatoes, and California native strawberries. Check with a local UCCE Master Gardener Program about which varieties are recommended for your zone.

  9. Peak water times
    Fruit and vegetables have critical periods for increased water demands. For most plants once they become established watering times and amounts can be reduced until the flowering or fruit setting process begins. An increased amount of water should be reintroduced during this time. After this initial period of fruit set water can slowly be reduced again. In some cases, reducing water can improve the flavors of your harvest (think, dry-farmed tomatoes)!

  10. Garden size
    Determine the amount of fruits and vegetables needed to feed your family, does your family have two, four, or eight members? If you overproduced and wasted crops last year - decrease the amount of plants this year. Set up a garden exchange in your neighborhood so everyone grows less but still has a great variety!

The University of California Master Gardener Program extends to the public free UC research-based information about home horticulture and pest management. In exchange for the training and materials received from the University of California, Master Gardeners perform volunteer services in a myriad of venues. If you are interested in becoming a certified UC Master Gardener contact your local UC Cooperative Extension office.  

Posted on Thursday, April 3, 2014 at 11:43 AM
  • Author: Melissa G. Womack
  • Author: Nancy Grove, UCCE Master Gardener of San Mateo and San Francisco counties
Tags: Drought (35), Gardening (17), Master Gardener (9), Planting (1), UCCE (3), Vegetables (3)

How do I start seeds indoors?

Starting your vegetables indoors early can give your garden a jumpstart on spring. It also reduces the cost of seedling transplants in that a packet of seeds cost about the same as 1, 4-inch tomato plant. It also allows you to grow seedlings of varieties that may be difficult to find in the nursery as transplants.

To start you will need . . . . .     Learn more

a coldframe for starting seeds
a coldframe for starting seeds

Posted on Friday, April 24, 2009 at 12:01 PM
 
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