1. Soils of the Great Plains: Land Use, Crops and Grasses;Aandahl,1982
2. Annual Cropping may be Practical and Profitable;Aase,1989
3. Stubble height effects on seasonal microclimate water balance, and plant development of no-till winter wheat;Aase;Agric. Meterol.,1980
4. Management strategies to improve yield and nitrogen use of spring wheat and field pea in the semi-arid northern Great Plains USA;Allen,2010
5. Crop choices and rotation principles;Baumhardt,2006