Start Date: Aug 01, 2008
End Date: Jul 31, 2012
The research will be conducted at The University of Tennessee, Research and Education Center, Milan, and in the Department of Biosystems Engineering and Soil Science, Knoxville. The effect of fluidized gas desulfurization (FGD) gypsum on soil properties and cotton yields will be evaluated using both conventional and no-till management systems. FGD gypsum will be applied at rates of 0, 1, 2, 3, and 5 tons per acre to replicated conventional and no-till cotton plots. Cotton yields will be measured at the end of the growing season. Soil samples collected each year will be characterized: for total carbon, nitrogen, and sulfur; pH; extractable aluminum, potassium, and phosphorus; particle size distribution and water dispersible clay. The most appropriate FGD gypsum amendment rate, in terms of yield increases and reduced soil erodibility, will be selected from these data.