Eng Hwa Ng, Soil & Crop Science, Texas A&M University, College Station, TX, C. Wayne Smith, MS 2474, Texas A&M University, College Station, TX, Eric Hequet, Department of Plant and Soil Science, Fiber and Biopolymer Research Institute, Lubbock, TX and Steve Hague, 370 Olsen Blvd, Texas A&M University, College Station, TX