1. Dep. of Agronomy Kansas State Univ. 4500 E. Mary St. Garden City KS 67846 USA
2. Dep. Of Agronomy, Throckmorton Hall Kansas State Univ. Manhattan KS 66506‐5501 USA
3. Dep. of Agronomy Kansas State Univ. Agricultural Research Center‐Hays 1232 240th Ave. Hays KS 67601 USA