ИСТИНА

Based on the unique archive of long-term and short-term field experimental data of the Geographic Network of Experiments with Fertilizers and the Agrochemical Service, a single systematic database “Agrogeos” was constructed. It covers a 40-year period for the vast arable territory of the USSR with a high diversity of soil and climate conditions. The array of information is diverse and systematized. It includes results of more than 1500 field experiments with oats, 5000 with winter wheat, 7000 with spring wheat for Russia. Combination agrochemical information from archive experimental work for several decades with current field observations greatly expands the possibilities for solution theoretical and applied problems in modern agriculture. On the basis of “Agrogeos” several GIS and yield models, an Information and Analytical Support System for Agricultural technologies has been developed, which includes GIS mapping of yield potential (dependent on natural factors)and implied yield (depending on the actual field fertility level) for specific crops. The methodology of yield calculation is based on an independent evaluation of a set of significant factors by linear and nonlinear multiple regression methods. Yield-affecting factors are divided into two large groups - natural (climate, relief, soils, etc.)and agrochemical - (application of fertilizers, plant protection products, agricultural technology level etc.).