04/09/2024
In 2014, mounting concerns around California’s severe drought and increasing regulatory pressures gave rise to a collaborative effort between Sustainable Conservation, Netafim USA, and De Jager Farms to revolutionize water efficiency and nutrient management for dairy farms in the Central Valley.
Nate Ray, CEO of De Jager Farms, spearheaded this effort, proposing that his operation’s lagoon water be utilized through drip tape to sustain feed crops in place of traditional flood irrigation.
Ray began experimenting with the Subsurface Drip Irrigation for Dairy Effluent system shortly after the passage of the Sustainable Groundwater Management Act.
“SGMA, the framework of it, was in its infancy stages at that point that nobody really knew — we didn’t know if we were going to get our wells metered, nobody knew what the rules were,” Ray said. “We just knew that, to be good stewards of the land, to be sustainable for future generations, we were going to have to reduce the amount of water that we pumped out of the ground ourselves…but we understand the cyclical nature of how the weather patterns are, and we know that there is a time that we have to tap into that resource below us. As much as we can preserve that and not overdraft, that is our main goal.”
Ray brought in Sustainable Conservation and Netafim USA to enhance his ability to test the system. Since then, the SDI-E system has been used successfully on dairy farms to fertilize non-human consumables, eliminating the need for synthetic fertilizers and maximizing crop yields. The system saves over 2.3 billion gallons of water and 2.4 million pounds of nitrogen pollution annually across 4,432 acres of feed crops in California, according to a press release from Sustainable Conservation.
The SDI-E system continues to expand upon its efficiencies and recently secured a Conservation Innovation Grant from the National Resources Conservation Service for a first-of-its-kind pilot project at De Jager Farms where it will be adapted to irrigate and fertilize almonds...
As the project moves toward testing on human consumables, John Cardoza, project director at Sustainable Conservation, explained that food safety remains a top priority. With the official green light from the California Department of Agriculture and the Department of Public Health, the project will implement rigorous safety protocols to ensure compliance with food safety standards during the testing phase.
Cardoza explained that tests will cover every aspect touched on by the SDI-E system, including the soils, lagoon water, freshwater, and tree tissues from the almond trees. The project will test whether the SDI-E system keeps water and bacteria below the soil’s surface or if they rise to the surface. This will involve monitoring the concentration of bacteria, testing the nuts at harvest, and observing if any bacteria make it onto the shells or nuts.
The pilot project is expected to run for three years, working with 2025 and 2026 cropping years before a final analysis and reporting in 2027, Cardoza explained...
According to Domonic Rossini, Western Agronomy Leader at Netafim USA, the end goal is for farmers to utilize natural resources and maximize production with limiting inputs. Typically, he explained, converting from a flood system to a drip system results in a 25% gain in production, and water consumption is reduced by roughly an acre-foot. Further, with sub-surface drip irrigation, water is not lost to the atmosphere due to heat and runoff.
“You know, farming is being restricted to less and less land...so if we can maximize what we have, it allows us to produce so we can keep feeding this growing population with safe food,” Rossini said.
Follow the link to learn more about the SDI-E system and pilot project:
https://www.valleyagvoice.com/central-valley-farms-lead-the-way-in-water-saving-irrigation/
Netafim USA Conservation
With a Conservation Innovation Grant, dairy effluent technology expands to almonds. By Natalie Willis, Reporter, Valley Ag Voice In 2014, mounting concerns around California’s severe drought and increasing regulatory pressures gave rise to a collaborative effort between Sustainable Conservation, N...