Errata: A Fertilizer Production Surface with Specification of Economic Optima for Corn Grown on Calcareous IDA Silt Loam

Abstract

Our article, “A Fertilizer Production Surface” (This Journal, Aug. 1954), contains certain typographical errors that were not caught in proof reading. The following corrections should be made: In the first equation on page 469, the exponent should be F₁. The order of the figures in columns 2 and 4 on page 479 should be reversed, with the smallest magnitude at the heading of these two columns. A negative sign should precede 5.682 in equation III on page 470. In equations 1 and 2 on page 473, the term should read 6.415P^−.5. The term in equation (1) on page 481 should read 5.359P^−.5. A minus sign should precede 5.7 in table 3.