Author Information

B. G. Mullinix
C. W. Bednarz

Abstract

Previous research has shown that yield of cotton increases with plant density until density reaches 16 to 20 plants m-2. In 1997 and 1998 cotton was planted at various densities ranging from 2.5 to 22.5 plants m-2 in a RCB design. Ten row feet (3.048 m) of cotton were cut at ground level in each plot and placed into separate bags. Plant density for each plot was found by counting the number of plants in the bag representing that plot. For each plant, a boll found was placed in a small bag representing the fruiting branch and position from which it had been taken. A token was placed in the compartment which contained this bag. Any position without a harvestable boll was recorded as zero. Each small bag was weighed (total boll weight) and number of bolls were determined from count of tokens thus providing mean boll weight. Mixed model analyses were performed on total yield, mean boll weight, and percent harvestable bolls: however, only mean boll weight will be presented. A response surface was determined for fruiting position by plant density.

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Apr 28th, 4:00 PM

EFFECT ON BOLL WEIGHT OF COTTON PLANTS PLANTED AT VARIOUS DENSITIES

Previous research has shown that yield of cotton increases with plant density until density reaches 16 to 20 plants m-2. In 1997 and 1998 cotton was planted at various densities ranging from 2.5 to 22.5 plants m-2 in a RCB design. Ten row feet (3.048 m) of cotton were cut at ground level in each plot and placed into separate bags. Plant density for each plot was found by counting the number of plants in the bag representing that plot. For each plant, a boll found was placed in a small bag representing the fruiting branch and position from which it had been taken. A token was placed in the compartment which contained this bag. Any position without a harvestable boll was recorded as zero. Each small bag was weighed (total boll weight) and number of bolls were determined from count of tokens thus providing mean boll weight. Mixed model analyses were performed on total yield, mean boll weight, and percent harvestable bolls: however, only mean boll weight will be presented. A response surface was determined for fruiting position by plant density.