1. Dep. of Agronomy Kansas State Univ. 4500 E. Mary St. Garden City KS 67846 USA
2. NW Res. Ext. Ctr. Colby, 67701 KS USA
3. Kansas State Univ. SW Res. Ctr. 1474 State Hwy. 96 Tribune KS 67879‐97774 USA
4. Dep. of Agronomy Kansas State Univ. Manhattan KS 66506‐5501 USA