{"id":24557,"date":"2022-07-27T10:52:14","date_gmt":"2022-07-27T17:52:14","guid":{"rendered":"https:\/\/plantingseedsblog.cdfa.ca.gov\/wordpress\/?p=24557"},"modified":"2022-07-27T11:53:24","modified_gmt":"2022-07-27T18:53:24","slug":"drip-irrigation-study-sees-huge-reduction-in-water-fertilizer-use-for-sweet-corn","status":"publish","type":"post","link":"https:\/\/plantingseedsblog.cdfa.ca.gov\/wordpress\/index.php\/2022\/07\/27\/drip-irrigation-study-sees-huge-reduction-in-water-fertilizer-use-for-sweet-corn\/","title":{"rendered":"Drip-irrigation study sees 37 percent reduction in water use and five percent increase in yield"},"content":{"rendered":"\n

<\/p>\n\n\n

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Tayebeh Hosseini, a UCCE research staff member, takes canopy infrared images to study the growth of desert sweet corn. (Photo by Ali Montazar)<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n

A new study suggests that drip irrigation for sweet corn can significantly conserve water, reduce fertilizer use and boost crop yield in the low desert of California \u2013 and likely in other areas of the state with similar conditions.<\/p>\n\n\n\n

Although Imperial County is California\u2019s top sweet corn-producing county, with about 8,000 acres planted on average each year, irrigation methods for this crop have been rarely studied in this region (or anywhere else in the state), according to Ali Montazar<\/a>, UC Cooperative Extension (UCCE) irrigation and water management advisor for Imperial, Riverside and San Diego counties.<\/p>\n\n\n\n

Montazar conducted a study in the Imperial Valley over two crop seasons, 2020-21 and 2021-22, to demonstrate and quantify the potential benefits of switching to drip irrigation from the more common furrow irrigation method. The study, available in a recent issue of UC Agriculture and Natural Resources\u2019 Agricultural Briefs<\/a>, will be published in a future issue of Vegetables West.<\/p>\n\n\n\n

\u201cI\u2019m hoping with this project we can encourage growers to adopt it, because it seems very promising,\u201d said Montazar, noting that drip irrigation is a \u201cnew practice\u201d for sweet corn in California.<\/p>\n\n\n\n

Among the 11 commercial sweet corn fields in the study over the 2021-22 season, the six that were under drip irrigation used, on average, 37% less water than the five under furrow irrigation. In absolute terms, the drip-irrigated fields saw an average water savings of 2.2 acre-feet per acre; for Montazar, who has studied drip for a variety of crops in the Imperial Valley, that was an astonishing result.<\/p>\n\n\n\n

\u201cI\u2019ve worked with drip on processed onions, lettuce, alfalfa, spinach \u2026 we\u2019ve never seen a figure like 2.2 acre-feet per acre, that\u2019s huge,\u201d he said, attributing the dramatic drop-off to the high volume of water required to furrow-irrigate the sandy soil in the Imperial Valley.<\/p>\n\n\n\n

More efficient irrigation also means less fertilizer is needed \u2013 a boon to the environment and Salton Sea water quality, as well as growers\u2019 bottom line. With fertilizer prices continuing to rise, sweet corn growers using drip could see a substantial 25% cost savings on fertilizer expenses \u2013 about $150 per acre less \u2013 compared to furrow irrigation, according to Montazar\u2019s study.<\/p>\n\n\n\n

And by relieving plants of the stress from over- and under-irrigated conditions, drip irrigation helps keep soil moisture at its \u201csweet spot\u201d \u2013 resulting in a 5% increase in marketable crop yield for sweet corn in the study.<\/p>\n\n\n\n

\u201cWhen we have a better, more efficient irrigation system, we can maintain soil moisture at a desired level, over time and space,\u201d Montazar explained.<\/p>\n\n\n\n

Because the benefits of drip appear to be linked to soil conditions (sandy loam, and other light soils), Montazar believes that this irrigation practice could deliver relatively similar water and fertilizer savings and improved crop yield in other regions across California, regardless of climactic differences.<\/p>\n\n\n\n

\u201cIf you use drip in any part of the state, you have the benefits of drip \u2013 more uniform water application, more uniform fertilizer \u2013 that\u2019s not related to the desert,\u201d he said. \u201cThat\u2019s part of the system\u2019s potential.\u201d<\/p>\n\n\n\n

Montazar plans to follow up on his preliminary study with additional research on sweet corn and drip irrigation during the 2022-23 crop season.<\/p>\n\n\n\n

See the original post on the UC ANR site here.<\/a><\/em><\/p>\n\n\n\n

Learn about CDFA\u2019s State Water Efficiency and Enhancement Program (SWEEP)<\/a>, which provides grants for irrigation systems that reduce greenhouse gases and save water.<\/em><\/p>\n\n\n\n

For more information on CDFA\u2019s full suite of climate smart ag programs, please click HERE.<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

A new study suggests that drip irrigation for sweet corn can significantly conserve water, reduce fertilizer use and boost crop yield in the low desert of California \u2013 and likely in other areas of the state with similar conditions. 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