1. Conservation tillage systems and soil productivity;Allmaras,1985
2. Distribution of small grain residue produced by combines;Allmaras;Agron J.,1985
3. The importance of multiple cropping in increasing world food supplies;Andrews,1976
4. Computing soil erosion by periods using wind energy distribution;Bondy;J. Soil Water Cons.,1980
5. Conservation tillage in relation to plant disease;Boosalis,1981