Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 15, 1996
Publication Date: N/A
Technical Abstract: A high-residue cultivator with 20-cm-deep disruption between planted rows was compared with chemical weed control in a hardpan soil. Treatments were no tillage, subsoiling, cultivation, and both subsoiling and cultivation. We planted cotton (Gossypium hirsutum) into winter ryegrass (Lolium multiflorum Lam.) or winter fallow. Cultivation lowered soil strength over not tilling. Cultivation with subsoiling lowered strength over subsoiling alone. Plant heights were greater for subsoiled than nonsubsoiled and for fallow than rye cover plots. Plant heights were mixed for cultivated vs. noncultivated plots. Subsoiling increased yield. Cultivation did not increase yield. Yields in fallow plots were higher than in rye cover plots. Though cultivation decreased soil strength, it did not improve plant height or yield.