2013 Annual Report
1a.Objectives (from AD-416):
This research develops sustainable farming systems that will enhance (i) soil quality, (ii) soybean yield and yield stability under environmental and biotic stresses, and (iii) environmental quality and sutainability; and that will accommodate expected climate variability.
1b.Approach (from AD-416):
We propose to conduct studies in several locations in the U.S. to (i) develop best management practices that include no-till, cover crops, crop rotations, gypsum, and reduced levels of mineral fertilizers; (ii) characterize their effectiveness in improving soil and crop productivity, and carbon sequestration and in reducing green house gases and pollutant load to the environment; (iii) analyze the cost and benefits of the system that includes the increased yield, reduced input, and enhanced environmental quality and sustainability; and (iv) develop education and outreach program for sharing knowledge and understanding of climate change to youth and adults that results in adaptation of management technology and practices that increase soybean productivity while maintaining environmental sustainability.
Plots for the Indiana portion of this cross-location, cross-agency project were established in early 2012 at the Davis Purdue Agriculture Center (DPAC) near Farmland, Indiana. Yields from both the soybean and corn plots in 2012 were reduced due to the droughty growing conditions, and there were no observed differences from either gypsum or cover crop treatments. Cereal rye was seeded in the fall of 2012 to the plots designated for cover crops. Flue Gas Desulfurization (FGD) gypsum was again applied at rates of 0, 1000, and 2000 lbs/acre in late 2012.
Two varieties of soybeans were again planted in 2013, however this year both varieties are glyphosate-resistant to allow for better weed control. Greenhouse gas sampling has been conducted bi-weekly, with analysis for carbon dioxide, methane and nitrous oxide content. Plant tissue samples were collected in late July 2012, and crop yields measured in fall 2013.