Hungry cows may extend life of Ogallala: Texas Tech Study
Here’s a suggestion for South Plains producers looking to turn a profit while preserving Ogallala Aquifer water: Put the cattle out to pasture. After three growing seasons, researchers with the Texas Alliance for Water Conservation (TAWC) have found that for growers looking to curtail their irrigation, grazing cattle on forage land could be the most profitable use of acreage.
TAWC is an eight-year, $6.2 million demonstration project monitoring 26 Floyd and Hale County producers who use a variety of crop and livestock grazing combinations. By monitoring their farms over eight years, researchers hope to pinpoint growing practices and technologies that can allow growers to continue turning a profit on their land while at the same time preserving diminishing South Plains water resources.
Water Cost. “You can take other crops and make them profitable per acre, but when you look at the yield per unit of water investment, you get a different picture. Out here, water is the scarce resource, so we have to look at things in terms of water cost,” said Vivien Allen, a Texas Tech University Thornton Distinguished Professor and Horn Professor of Forages.
Project partners hosted a field day for area producers July 31 to discuss future project research, new Farm Bill provisions – and, of course, their findings so far.
While researchers stress it is still too early in the demonstration and that the systems under study are too complicated to draw too many conclusions as of yet, there are some intriguing trends. Among them:
• Producers who foraged livestock or grew forage fields alongside row crops have consistently enjoyed higher net yields for the amount of water and fertilizer they used. In 2005, for example, one TAWC grower devoted all of his acreage to foraging cattle. He used an average 1.23 inches of irrigated water per acre and enjoyed a yield of $125.89 per acre, or $93.34 for every inch of water he used – not the highest overall yield but more than double any other system terms of dollar per inch of water used. These findings confirm more than 10 years of separate studies led by Allen testing forages against cotton monocultures on Texas Tech’s Research Farm in New Deal.
• Sorghum requires less water than corn and can return similar profitability to the grower per acre.
• Perennial forages have a big advantage in prevention of soil erosion, lower nitrogen and water requirements, and have the potential to be profitable, particularly for the amount of water invested.
• Integrating forage production and/or grazing with crop production generally improves water conservation of the overall system because of the water-use efficiencies of forage.
Test Sites. Through the 26 test sites, TAWC partners are examining multiple commodities under different management techniques. The project documents local producers who make their own decisions on cropping and livestock practices in a variety of dryland and irrigated systems that include cotton, corn, sorghum and small grains.
Researchers cautioned in their summary that profitability should be balanced against the long-term ability to sustain resources. The Ogallala Aquifer, which supplies most irrigation water for the region, is not replenishing as quickly as it is being used.
“Sustainable profits may differ greatly from maximum profits that are achieved with non-sustainable depletion of natural resources,” they noted.
Written by Cory Chandler
CONTACT: Rick Kellison, project director, Texas Alliance for Water Conservation, Texas Tech University, (806) 742-2774, or firstname.lastname@example.org.