Working Document Series Open Access 2010 RUF-34651

Lime requirement of selected acid soils of Lesotho and response of field beans to lime application

M.V. MarakeT. Nkheloane

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Abstract

191 words

A greenhouse experiment was undertaken to evaluate the effects of lime application (at different rates) on soil pH, exchangeable aluminium (Al3+) and plant response to lime application across four of the strongly acidic soils series of Lesotho. The objective of this study was to develop lime recommendations for management of acid soils in Lesotho by determining the lime requirement of selected soils, determining the effect of lime on biomass and height of beans (Phaseolus vulgaris) plants and the effect of liming on available phosphorus. This experiment was a 4 x 6 randomized complete block design with three replications and was a two factor experiment involving only soil and lime. The results of this study indicated that soil pH across all the soils increased with increasing lime addition. However Al3+ decreased with more addition of lime on all the soils. Both plants parameters (height and biomass) increased with increase in lime rates but the response was negative as more lime was added, i.e., there was no linear relationship between lime rates and both plant parameters’ response (P > 0.05). There was no significant effect of lime on phosphorus across all the soils

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