Figure 1. Response surface contour plot for grain yield as a function of goat manure and poultry manure at constant level of cattle manure

From

Application of Response Surface Methodology in Optimization of the Yields of Common Bean (Phaseolus vulgaris L.) Using Animal Manures

Kimtai Leonard Masai, Moses M. Muraya, Adolphus Wagala

American Journal of Applied Mathematics and Statistics. 2020, 8(2), 64-68 doi:10.12691/ajams-8-2-5