1. Management of tropical Vertisols;Ahmad,1989
2. Effect of tillage on some soil physicochemical properties and on annually cropped spring wheat yields;Bauer,1978
3. Characterizing soil water relationships in swell-shrink soils;Bouma,1988
4. Vertisolic soils: A new order in the Canadian System of Soil Classification;Brierley,1996
5. Crop rotation studies on the Canadian prairies;Campbell;Research Branch, Agriculture Canada, Publ. 1841/E,1990