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Use of the Yield Equation in Pineapple Culture 1
Author(s) -
Farden C. A.,
Magistad O. C.
Publication year - 1932
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1932.00021962002400120004x
Subject(s) - chemist , citation , yield (engineering) , library science , mathematics , computer science , information retrieval , chemistry , physics , organic chemistry , thermodynamics
In a previous article (I), a we have presented data on the yield of pineapples as influenced by potash fertilization. The results obtained were subjected to mathematical treatment in which the constants in the yield equation, Y = M -ARx, as proposed by Spillman and Lang (3), were determined. A method termed "Spillman’s second method," of evaluating the constants was presented. By means of the yield equation~ it was shown how the amount of available plant food, potash, in the soil might be determined.. The purpose of the present paper is to present the application of the yield equation to determine the economical limit of fertilikation with changing prices of fertilizers. Inasmuch as the method presented in the previous article (i) for determining the constants in the yield equation Y = M -ARx require calculating equipment not available to many; it seemed well to include in this paper a simpler method for the determination of these constants.