PROTOCOL FOR THE PRECONIZATION AND DETERMINATION OF PHOSPHO-POTASSIUM AND MAGNESIC FERTILIZATION (PKMG) OF AGRONOMIC CULTURES

摘要

Protocol for diagnosing the phosphoric, potassium and / or magnesium status of arable soils and for recommending mineral fertilizer inputs PKMg including; • the preliminary compilation of a set of agronomic observations of the yield potential and the physicochemical and / or biological characteristics of the soils of a territory, according to n agronomic (AGRO) and / or soil (PEDO) variables, • a multivariate (multidimensional) analysis of these AGRO and PEDO data, and obtaining at least the first two sets of principal component coordinates (CPn) most correlated with each of the variables AGRO and PEDO, and characterized in that; • the correlation of the variables AGRO and PEDO to be correlated is done by dividing the values of AGRO and PEDO in question by the coordinates of the CPn most correlated with one thus establishing a series of pseudo variables AGRO and PÉDO , as well as an intrinsic correlation, advantageously in the form of a linear, quadratic or power function, between these two pseudo variables AGRO and PEDO, • the sampling of a parcel and / or an agricultural island belonging to a portion of this territory is made according to the rules of the art in order to obtain a representative soil sample, • the sample is analyzed so as to establish the value or values of the variables PEDO of interests that one seeks to correlate, link to one or more AGRO variables, • the PEDO variable (s) define the corresponding AGRO variable (s) according to the intrinsic correlation connecting the two pseudo variables AGRO and PEDO in question.