A soybean trial using a sample of Dark-Red distrophic medium texture Latosol was carried out under greenhouse conditions at the Escola Superior de Agricultura ‘Luiz de Queiroz’ in Piracicaba, São Paulo, Brazil, from December 1993 to July 1994, to evalvate the effects of subsurface compaction and the application of gypsum on nitrogen and phosphorus levels of soybean shoots. A scheme in a bloc randonized desdign, with treatments arranged in a 4 x 4 factorial, with four replications, corresponding to the soil surface […]