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Leaf area display and light interception in short-season soybeans
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This study was designed to examine leaf area display and light interception patterns in the crop canopy in relation to yield production sites of two varieties of short-season indeterminate soybeans. Soybean plants grown in narrow rows (25 cm) had a greater leaf area index, intercepted more light and yielded 23% more than soybeans grown in wide rows. For seed yield there was a variety-row width-density interaction. Although most light interception, and therefore photosynthate production occurred in the upper regions of the plant canopy, many of the leaves displayed there were attached to nodes lower in the plant. Thus carbohydrates were suppled to lower regions of the plant, from these leaves, where most of the yield was found to occur. However leaves attached low in the canopy were still somewhat shaded by upper leaves, thus it is probable that greater efficiency of production could be obtained by concentrating breeding effects for improved canopy architecture with deeper light penetration into the canopy. [AS/Sundar]
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 Record created 1985-05-31, last modified 2019-03-04

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