1. Dep. of AgronomyKansas State Univ.1712 Claflin St.ManhattanKS66506
2. Dep. of Agriculture EngineeringUniv. Federal de Santa MariaAv. Roraima no 1000Santa MariaRSBrazil97105‐900
3. Virginia Polytechnic Inst. and State Univ.Tidewater Agric. Res. And Ext. Cent.SuffolkVA23437
4. Sustainable Intensification Innovation LabKansas State Univ.ManhattanKS66506