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Effect of phosphorus and potassium fertilization on yield of 2 potato cultivars


Effect of phosphorus and potassium fertilization on yield of 2 potato cultivars



Libyan Journal of Agriculture 6(1): 127-138



The effect of 4 levels of P (0, 50, 100 and 150 kg P2O5/ha) and 4 levels of K (0, 80, 160 and 240 kg K2O/ha) on yield of tubers in the potato cultivars Kenva and Arran Banner was studied during the spring season 1975 and the fall season 1975-76. K at the rate of 80 kg/ha K2O gave significant increase in tuber yield in both cultivars. Higher levels of K generally reduced tuber yield. The response to K application was manifested in both number of tubers per plant and average weight of tuber. P application resulted in increases in tuber yield. The response to P was more significant in the fall planting than in the spring planting for both cultivars. Tuber weight showed gradual increase with increasing P application up to 100 kg/ha of P2O5, but increasing P above that level in the spring planting showed slight decrease in weight of tubers in both cultivars. Only low levels of K should be recommended for potato fertilization in soils of the same chemical and physical structure as the soil in the Tripoli [Libya] area.

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Accession: 005261220

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