Emily N Weaks1, Yogendra Raut2, Hasni Jahan3 and Khandakar R. Islam1, (1)Soil, Water and Bioenergy Resources, Ohio State University, Piketon, OH (2)1864 Shyville Rd., Ohio State University, Piketon, OH (3)Soil, Water and Bioenergy, Ohio State University South Centers, Piketon, OH
Zeolites are naturally occurring alumino-silicate minerals with a large reactive surface area. A field study based on randomized complete block design was established in 2010 to evaluate the effects of Zeolite as a soil amendment to improve the N and P-use efficiency of crops. Mined Ca-Zeolite was applied at 0, 25, 50, 100 and 200 kg/ha, respectively in winter-killed Cowpea and radish cover crop plots in April, 2011. Composite soil samples were collected monthly from each replicated plot at 0 to 15 cm depth, processed, and analyzed for nitrate, ammonium and available P after extracting the field-moist soil with deionized water and 1-M KCl solution. Results showed that N and P availability to plants was improved. Lesser amount of nitrate was extracted by both water and 1-M KCL solution. Most of the N was extracted as ammonium by 1-M KCL solution. Corn yield was responded to Zeolite application.