Factors which affect the growth of grain legumes on a solonized brown soil, 1. Genotypic responses to soil physical factors
1991
Atwell, B.J. (Commonwealth Scientific and Industrial Research Organisation, Wembley (Australia). Dryland Crops and Soils Research Unit)
Lupinus angustifolius cvv. Yandee and 75A-258 and L. pilosus cv. P.20957 and peas cv. Dundale were grown in the field for 43 days on a solonized brown soil. Yandee lupin was poorly adapted, shoot growth was restricted and roots ceased growing 36 days after sowing. At 20-30 cm depth, root extension was slow or arrested; and primary root apices were often necrotic in the soil below 20 cm. In contrast, roots proliferated rapidly in soil nearer the surface. Soil physical properties were not considered a likely explanation, and penetrometer readings and root tip osmotic pressures did not implicate mechanical resistance. By inference, soil chemical factors could underlie the responses observed.
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