Volume 21, Number 3, 1997

The effectiveness of fluid (phosphoric acid and 10-30-00 colloidal suspension) and solid (monoammonium phosphate and triple superphosphate) fertilizers was evaluated in a greenhouse experiment at the Center for Nuclear Energy in Agriculture (CENA), University of São Paulo, Piracicaba, State of São Paulo, Brazil, from June to October, 1992. Corn plants were grown in pots (8 plants per pot; 3 replicates) containing 1 kg of two red-yellow latosols with different phosphorus retention capacities, for three successive cycles (30 days each). The […]

The nutritional limitations of an organic soil supporting a lowland rice crop, cv. Inca, were identified in a greenhouse experiment in Lavras, State of Minas Gerais, from December, 1994, to June, 1995. Soil samples were collected in Northern Fluminense region. Treatments consisted of control (natural soil), complete (N, P, K, limestone, S, B, Co, Cu, Mo, and Zn) and complete lacking one of these nutrients at a time. At the grain maturation time, the treatments lacking N and K showed […]

Face the planosols (Albaqualf) importance to the agricultural activities in the South Region of the State of Rio Grande do Sul, Brazil, the effect of chiselling on physical parameters of this soil was studied. Experiments were carried out at the Agricultural Machines Experimental Area of EMBRAPA – CPACT, in Capão do Leão, RS, November, 1994. It was analysed the effect of chiselling at three operating speeds (4.76; 3.63 and 2.58 km h-1), in two levels of soil moisture content (119.6 […]