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Influence of interactions of barley cultivars with soil and fertilizer potassium and soil ph on grain yield and quality



Influence of interactions of barley cultivars with soil and fertilizer potassium and soil ph on grain yield and quality



Plant and Soil 86(2): 265-272



The interaction of exchangeable soil K with cultivars resulted in differences in grain production by 5 barley [Hordeum vulgare] cultivars. The cultivars differed in the amount of exchangeable soil K required to produce maximum yield. 'Bonanza' attained its maximum yield at 183 kg K2O ha-1, but 'Galt' did not reach its maximum yield until a high level of exchangeable soil K was reached (252 kg K2O ha-1). 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 soil NO3-N and soil pH with cultivars indicated differences in acid tolerance of the cultivars. 'Galt' was more pH sensitive than 'Bonanza'.

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