Main edaphic and climatic variables explaining soybean yield in Argiudolls under no-tilled systems

BACIGALUPPO, S.; BODRERO, M.L.; BALZARINI, M.; GERSTER, G.R.; ANDRIANI, J.M; ENRICO, J.M.; DARDANELLI, J.L.

ELSEVIER SCIENCE BV

Año: 2011 vol. 35 p. 247 - 247

rgentina is an important producer of soybean (Glycine max L. Merr.), with 83% of the crop being cultivated under no tillage. Yield gaps of up to 2000 kg ha-1 are usually recorded in the main area, even between fields that are at a short distance. Soils are predominantly Argiudolls, with subsurface compacted layers (massive zones without visible macropores, termed delta clods, M). The aims of this work were (i) to identify climatic variables and soil properties that explain seed yield variation in rainfed soybean growing in no-tilled Argiudolls; and (ii) to quantify the relative effect of those soil and climatic variables on field soybean yield. The database, which included 175 cases of soybean crops, was obtained from production fields during four crop seasons, covering a wide range of environmental and soil conditions. Multifactor linear regression was used to assess soybean yield variability and quantify the contribution of climatic and soil traits in the formation of grain yield