Article: Research reports from University of Nebraska provide new insights into agroecosystems.

"Grain sorghum [Sorghum bicolor (L.) Moench] yield is often constrained by low soil water and nutrient availability in Ethiopia. The integration of tied-ridging for water conservation with fertilizer application in semi-arid sorghum production areas of northern and central Ethiopia was evaluated in five trials in 2005-2007," investigators in the United States report.

"Three tillage practices and four fertilizer application treatments were evaluated in a complete factorial. The tillage practices included tied-ridging before (TRbr) and after (TRr) the on-set of rains, and shilshalo, a traditional ridging practice for preventing runoff and controlling weeds ...

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