Dick,Malhi O' sulvivan and Walker

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Date
1981
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Kenya Soil Survey
Abstract
The interaction of exchangeable soil K with cultivars resulted in dIfferences in grain production by five barley cultivars. The cultivars differed in the amount of e"changeable soil K required to produce maximum yield. Bonanza attained its maximum yield at 183 kg K.O ha-', but Galt did not reach its maximum yield until a high level of exchangeable soil K was redched (252 kg K.O ha-'). The other cultivars were Within this range. The cultivars also differed in their yield response to applied K fertilizer. Under conditions of growth-limiting K supply, Galt and Gateway were slightly more responsive to the addition of K fertilizer than were Centennial and Conquest, and much more responsive than Bonanza. The interactions of exchangeable soil K and soil pH or soli NO, -N and soil pH with cultivars indicated differences in acid tolerance of the cultivars. Galt was more pll sensitive than Bonanza.
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