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This article in AJ

  1. Vol. 55 No. 3, p. 263-265
    Received: Sept 17, 1962



Effect of Variation in Fertilizer Rates and Ratios on Yield and Profit Surfaces1

  1. O. P. Engelstad2



Yield and profit surfaces from two selected corn and cotton experiments indicate that a rather wide range of flexibility in fertilizer rate and ratio is possible without seriously affecting either yield or profit.

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