by Staff Writers
Vernon TX (SPX) Jun 08, 2012
Loss of production may be one concern cotton producers have on the Rolling Plains when considering switching to reduced- or no-tillage systems, said Dr. Paul DeLaune, Texas AgriLife Research environmental soil scientist in Vernon.
Not only will cotton growers not lose production with subsurface drip irrigation, their economics will improve, according to DeLaune's latest research article that will appear in the July-August issue of Agronomy Journal.
DeLaune's study on cotton production as affected by irrigation level and transitioning tillage systems was designed to identify water management strategies that conserve and protect water resources within semiarid environments.
"We found that tillage has no impact on yields, the net returns are greater and, because we can deficit irrigate, we can save energy and water," he said.
The three-year study included five irrigation regimes, from 0 percent to 133 percent of evapotranspiration replacement, and evaluated four tillage systems - conventional till, reduced till, no-till and no-till with a terminated cover crop, he said. Treatments were replicated three times in a randomized complete block design.
The results showed lint yields were not affected by tillage or the interaction of tillage and evapotranspiration replacement, DeLaune said. The greatest lint yields and net returns were achieved at 100 percent evapotranspiration replacement. Optimum lint yields and net returns were achieved at 104.5 percent evapotranspiration and 102 percent evapotranspiration, respectively.
However, he said the models showed that producers could irrigate at 83 percent evapotranspiration and maintain optimum yields. The net returns where significantly higher for no-till systems compared with conventional till because of reduced labor and inputs.
"We concluded the adoption of conservation tillage systems should not negatively affect lint yield or net returns in deficit-irrigated subsurface drip irrigation cotton systems within the Rolling Plains, particularly during the transition from intensively tilled systems to conservation tilled systems."
While only 16 percent of planted cotton is irrigated in the Rolling Plains, irrigation accounts for 41 percent of the harvested cotton, DeLaune said. In such environments, it is important to determine management practices that conserve or best use water resources.
Texas A and M AgriLife Communications
Farming Today - Suppliers and Technology
Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.
Scientists complete most comprehensive genetic analysis yet of corn
Washington DC (SPX) Jun 07, 2012
An interdisciplinary team, led by researchers at Cornell University and the U.S. Department of Agriculture-Agricultural Research Service (USDA-ARS), has published the most comprehensive analysis to date of the corn genome. The team expects the achievement to speed up development of improved varieties of one of the world's most important agricultural commodities. The results should boost in ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2012 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|