2020 Climate Action and Agriculture Symposium
Information and documents related to the 2020 Climate Action and Agriculture Symposium Webinar featuring information on current climate trends and agricultural impacts, soil health and updates about related projects in San Diego and neighboring counties.
Featured Organizations and Programs:
- San Diego County Farm Bureau
- Spadra Farm, California State Polytechnic University, Pomona
- CDFA-Healthy Soils Program
- Composting Resources, County of San Diego
- Resilient Roots: Climate Smart Agriculture & Food Systems,
Climate Science Alliance
- Carbon Farming, Resource Conservation District of Greater San Diego County
- Solidarity Farm
- San Diego County Food Vision 2030, San Diego Food Systems Alliance
Technical Reports and Resources:
Compost and Mulch Market Study, County of San Diego (PDF Download,2.1 MB)
by the County of San Diego and Hidden Resources
Mulch Resources from Ben Faber, Ph.D., UCCE Farm Advisor (PDF Download,994 KB)
Questions and comments always come up about the use of mulch in orchards. Mulch has its benefits and drawbacks and they need to recognized in order to manage it. It serves to combat erosion and root rot, but it can also burn. Mulch and wood piled up against tree trunks and near trunks can cause damage to those trunks. A Fillmore grower actually goes through the orchard with a blower to move mulch away from trunks when alerted to fire. On the other hand, irrigated orchards have been shown to be effective at suppressing fire encroaching on homes. And mulches can suppress weeds and reduce water use, but it's possible that importing material for mulch can introduce weeds.
So where to read more about fire? Check out some of the blogs from the past.
Mulch and green waste applied to orchards
- Green Waste, Yard Waste, Whatever You Call It- It has Simple Rules for Use
- A Safer Source of Inexpensive Orchard Mulch
- Avocado planting holes
- Cellulase Production by Various Sources of Mulch
- A Caution on Free "Compost/Mulch"
- A Safer Source of Inexpensive Orchard Mulch
- Mulch, Avocados and the Home Garden
- Mature Compost Does NOT Kill Phytophthora
- Use of Mulch in Organic Orchards Called into Question
Mulch and Landscapes
Wandering around a mulched orchard is always an adventure. In the early days of commercial mulching of citrus orchards, it wasn't uncommon to come across golf balls, discarded wallets, and all kinds of things you would not want in your orchard. This can still be a problem when the grower is not watching to make sure the loads are clean.
As the material settled in, over time more commonly, there would be the evidence of the decomposers - the fungi that breakdown the organic mulch into nutrients. It would show up in the fruiting bodies, like those below
The fruiting bodies would show up, but the real activity would be in the mulch itself. The decomposition is done with enzymes that are secreted into the mulch to breakdown the lignin and cellulose that make up plant based materials. When you dig into the mulch, you find the mycelial mats of those fruiting bodies. The fungus part that actually does the enzyme secretion and nutrient absorption. These enzymes also help control disease organisms like Phytophthora.
But sometimes wandering the orchard, you come across odd things, like slime molds
And then you come across what looks like trash. At this stage of commercial mulching, it's hard to find trash in good quality mulch. Recently, I found some what looked like plastic trash in an orchard. This turns out to be a fungus, though. A stinkhorn. Another decomposer good for plants and the soil.
- Author: Kristian Salgado
For more information on the CDFA Healthy Soils Program: Click here
Kristian M. Salgado
Community Education Specialist 2 (CES2)
Climate Smart Agriculture
Ventura County Research Symposium
Sustainability Through Soil Health
February 27, 2020
Please join us for a morning of research updates and
speakers highlighting industry trends including:
- Soil Health Assessment and Management:
- Lessons from the Arid and Semiarid Southwest
- Dr. John Idowu, Extension Agronomist & Associate Professor at New Mexico State University
- Messages from Soil Health Research
- in San Joaquin Valley
- Dr. Jeffrey P. Mitchell, CE Cropping Systems Specialist at Kearney Agricultural Research & Extension Center
There's a new pub in town, and you can read it up. It's a generic guide to mulch use.
Mulches are materials that are applied to the soil surface, but not tilled, mixed, or combined with underlying soil. Landscape mulches are typically plant residues (organic mulches) or rock, sand, and stone (inorganic mulches). You may know that immediately after application mulches prevent weeds from germinating and reduce evaporative loss from soil surfaces, but there are other benefits as well. And down sides, as well.
Includes a table of common mulch materials with their benefits and potential problems.
This free publication is available by download.
Read more. Know more. And there's a lot more to read at ANR Publications.