Abstract
Abstract Data from a dry season field trial with short growth habit pigeonpea cultivars in Trinidad, West Indies, indicate a linear relationship between the maximum amount of dry matter accumulated by the crop and the amount of solar radiation intercepted by the foliage during growth. Analysis of these data shows that both the seasonal interception of solar radiation and the efficiency of its conversion to dry matter were reduced in plots which did not receive supplemental irrigation. Such plots also partitioned a smaller proportion of their total dry matter into grain. The potential of short growth habit pigeonpeas as a crop for both marginal cultivated areas and relatively sophisticated production systems is discussed.
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