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Alfalfa is native to semi-arid southwest Asia, and countries such as Iran, Georgia and Afghanistan, where it has developed under very hot, dry conditions. Although much of it is irrigated, it also grows on rangeland as well, and it can be successful in the dry areas of the United States with help from grass varieties.

“Our overall aim is to help producers in the Texas High Plains and elsewhere, transition toward lower water use by integrating grazing into cropping systems so it’s not just all cotton or all corn,” said Chuck West, plant and soil science professor at Texas Tech University.

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Growers often ask about the optimal row spacing for grain sorghum. As with many other agronomy-related questions, the answer is: It depends. I…