271-5 Using the Least Limiting Water Range to Evaluate Water Stress On Crops.

Poster Number 300

See more from this Division: S06 Soil & Water Management & Conservation
See more from this Session: Soil Conservation on the Great Plains From Sidelines to Center Field: II
Tuesday, October 18, 2011
Henry Gonzalez Convention Center, Hall C
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Joseph Benjamin and David Nielsen, USDA-ARS, Akron, CO
Plant stress caused by adverse soil physical conditions can cause major reductions in plant biomass and grain yield. One way to evaluate adverse soil physical properties is the use of the Least Limiting Water Range (LLWR). This procedure evaluates soil physical conditions based on soil water holding capacity, soil strength, and soil aeration. Using soil bulk density and water content measurements, we determined the time the plant was growing under physically limiting conditions. Plants evaluated included corn, winter wheat, sunflower, spring barley, field pea and red kidney bean. The effects of water stress as indicated by the LLWR on plant development, biomass production and grain yield will be discussed.  
See more from this Division: S06 Soil & Water Management & Conservation
See more from this Session: Soil Conservation on the Great Plains From Sidelines to Center Field: II