Effects of N, P, and K Fertilization on Fruit Yield, Macro- and Micronutrient Levels, and Nitrate Accumulation in Okra [Abelmoschus esculentus (L) Moench]1

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Abstract
Maximum yield was obtained from 120 lb. N/A; while, P and K had no favorable influence on yield. Fruit yield varied between years, probably because of rainfall variation. Nitrogen and Cu levels of plants increased but P, Ca, and Zn levels decreased with N application. Applied P-K increased only P and K levels of the plants. Levels of N, Mg, and Cu were higher in 1969 than in 1968, but Fe showed a reverse trend. Nitrogen applications increased NO3- accumulation in the fruit. Phosphorus and K concn were max in fruits; N, Zn, and Mn were high in leaves; and Ca and Mg concn were higher in green stems than in other tissues. Copper content was equally high in fruits and green stems. Roots contained max Fe, suggesting that okra plants tend to accumulate Fe in roots without translocating much to above-ground plant parts.

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