Sain, Gustavo, CIMMYT.

• Agronomía Mesoamericana 1993: Agronomía Mesoamericana: Vol. 4 (January-December) - Articles
  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.
  Abstract  PDF (Español (España))