1. World trends and needs in agricultural and tillage machinery systems as we approach the 21st century;Kishida,1985
2. Agricultural Research Service Program Plan,1983
3. Soil tillage and cultivation using non-tractive power transmission methods;LePori,1985
4. Residual compaction effects on cotton stand and yield;Hadas;Trans. ASAE,1985
5. Soil compaction effects on cotton emergence;Wolf;Trans. ASAE,1984