Original Articles
The influence of lime and phosphorus on the growth of white clover on highly weathered Natal soils
DOI: 10.1080/02571862.1985.10634139
Abstract
Results of field studies conducted on highly weathered Natal soils in which the performance of white clover (Trifolium repens cv. Regal ladino) was examined under a range of lime and P treatments applied in factorial combination, are presented. Despite adverse moisture conditions over the three seasons during which the studies were in progress, highly significant yield responses to lime and P were noted. Up to 460 kg P ha−1 were required in order to obtain a levelling-off of dry matter response to P. This large P requirement was consistent with information obtained from P sorption isotherms indicating extremely high P fixation in the soils under study. A noteworthy feature of P response data was a suggestion of increased P requirement under conditions of low rainfall. Yield responses to lime were commensurate with the elimination of exchangeable Al.
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