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Fertilizer phosphorus and potassium equivalents of some green manures for potato in alluvial soils of Punjab

Research Papers
R.C. Sharma
Central Potato Research Institute, Shimla 171 001, India
H.C. Sharma
Central Potato Research Institute, Shimla 171 001, India
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Keywords

Green manures
Fertilizer P and K equivalents
Economic tuber yield
Potatoes
India

How to Cite

Fertilizer phosphorus and potassium equivalents of some green manures for potato in alluvial soils of Punjab. (1990). Tropical Agriculture, 67(1). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1743
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Abstract

Field experiments were conducted during 1981-2 to 1983-4 on an alluvial (Ustochrept) soil of Jalandhar to determine fertilizer P and K equivalents of some green manures (GMs) for potato tuber production. The GMs increased the level of yields significantly. The fertilizer P and K equivalents, based on a fixed yield concept, were higher than those based on optimum yield concept. According to the fixed yield concept, GMs of Crotalaria and Sesbania were equivalent to 65 and 27 kg P ha-1 of fertilizer, respectively; and GMs of Crotalaria, Sesbania, pearl millet and green gram were equivalent to 158, 176, 54 and 89 kg Kha-1 of fertilizer, respectively.
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