MODELOS MULTIVARIADOS E CANÔNICOS APLICADOS AO MILHO: BENEFICIOS DO ADUBO VERDE com Vigna unguiculata L

The insertion of cover crops acts to promote nutrient cycling in the agroecosystem (Boer et al., 2007), making them more available for cultivated crops (Ziech et al., 2015). [...]the objective of this work was to analyze the efficiency of multivariate and canonical models applied to corn crop in a green manure production system, using cowpea bean. 2 BIBLIOGRAPHY REVIEW Among the grain crops produced in Brazil, the corn crop stands out for its importance, both economically and socially. [...]it is essential to enable the no-tillage system due to its ability to add residues to the system, which provides increased organic matter content in the topsoil, improving aggregate stability and consequently giving greater soil resistance to erosion (Cassol, 2019). In Brazil, the first official record on green manure dates from 1919 with a concept that made explicit a "chemical vision", which required the incorporation of plant mass in the soil, aiming to improve its fertility, having in the 90s to have a more "holistic" view where aspects of soil (physical, chemical and biological protection and recovery), animals (fodder), man (food, 19 fibers, seed production, etc.) and the environment (decreased environmental impacts of agriculture and carbon sequestration - C). Legumes form symbiotic associations with N-fixing bacteria, performing biological nitrogen fixation, and present low C/N ratio, which may favor rapid decomposition and mineralization, with significant N contribution to the soil system (Partelli et al., 2011), which may lead to reductions in N rates in corn (Kappes et al., 2015).