A general quadratic response model is used to find optimal rates of nitrogen (N) and phosphorous (P) for maize in two recommendation domains in the Chiriqui Province, Panamá.
DOI:
https://doi.org/10.15517/am.v4i0.25106Abstract
For the recommendation domain 1 (RD1), characterized by high initial content for P in the soil and a low level of organic matter (OM), optimal economic rates were 184 kg N/ha and no P application. For the RD2, low P and high level of MO, the optimal rates were 72 kg N/ha and 51 kg P2O5/ha. For the DRl the profitability of fertilizer application was found to be significantly superior to that found in RD2. For fertilization to be profitable in the RD1 the minimum rate of return acceptable to farmers must be inferior to 42%, while in RD2 this rate must be inferior to 93%.
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ACOSTA, M.; PINZON; B., RUIZ, J. 1991. Respuesta del maíz a la fertilización con nitrógeno y fósforo en tres suelos del suroeste de la Provincia de Chiriquí. Presentado en la XXXVII Reunión Anual del Programa Cooperativo Centroamericano para el Mejoramiento de Cultivos y Animales (PCCMCA). Panamá. 23 p.
BEATTIE, B.; TAYLOR, R. 1985. The economics of production. John Wiley & Sons. New York. 320 p.
BYERLEE, D.; HARRINGTON, L. 1981. Deriving optimum fertilizer leve1s: the naive economist versus the practical farmer. International Maize and Wheat Improvement Center. Economics Program Training Note. Mexico. 14 p.
CENTRO INTERNACIONAL PARA EL MEJORAMIENTO DE MAIZ Y TRIGO. 1988. La formulación de recomendaciones a partir de datos agronómicos: Un manual metodológico de evaluación económica. Edición completamente revisada. México D.F., México. 79 p.
GUJARATI, D. 1992. Econometria. México, McGraw-Hill. 597 p. 2nd ed.
JAUREGUI, M.; SAIN, G. 1991. Continuous economic analysis of crop response to fertilizers in on-farm research. CIMMYT economics paper No 3. México D.F., México. 103 p.
SAIN, G.; JAUREGUI, M. 1992. Deriving fertilizer recomendations with a flexible functional form. Manuscrito enviado para su publicación en el Agronomy Journal. 16 p.
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