Soybean [Glycine max (L.) Merrill] inoculation and reinoculation are essential to guarantee the maximization of the biological N2 fixation process. Most inoculants commercialized for soybean in Brazil are peat-based, but there are doubts about the dose of peat inoculant which should be recommended, specially under stressing conditions or in areas previously inoculated. Therefore, for the central region of Brazil, the recommendation is 1.000 g of inoculant/50 kg of seeds, with a sugar cane solution as adhesive. However, in this study […]

A field experiment was carried out on a clay-sand-loamy Red-Yellow Latosol (Typic Acrustox) in Planaltina, Federal District, Brazil, during the cropping seasons of 1995/96, 1996/97 and 1997/98, to compare the effect of three methods of copper application (soil, foliar spray and seed treatment) on soybean (cv. Doko RC) grain yield and to determine the soil and leaf critical levels of that nutrient. There were no significant differences among the treatments in the first crop, probably due to a dry spell […]

Increase in soil pH by liming has been considered sufficient to assure Mo availability for crops. In soybean, the high response to liming might be related to additional demand of Mo for nitrogenase complex activity, in relation to other non-nitrogen fixing crops. Therefore, this research planned to study lime-Mo interactions for soybeans and sorghum crops, in a Red-Yellow Podzolic soil from the Mococa Experimental Station, Instituto Agronômico, State of São Paulo, Brazil, during the period 1985 to 1989. The treatments […]