Foliar diagnosis is an important tool to assess the nutritional status of apple trees. Nutrient concentrations on leaves vary with both sampling time and fertilization practice. The aim of this paper was to evaluate the effects of nitrogen and potassium fertilizations on growth parameters and mineral concentration on leaves of apple trees in two periods of sampling. The experiment was conducted in São Joaquim, ...
The objective was to obtain information for Panicum maximum v. Tanzânia related to the combined supply of potassium and magnesium, through the evaluation of the number of tillers and leaves, leaf area, leaf chlorophyll concentration, and shoots dry matter yield. An experiment was carried out in a greenhouse by using nutrient solution during the Spring season in Piracicaba, state of São Paulo. An incomplete 52 f...
From a coffe plantation situated on a Red-yellow Latossol in the Santo Izidro farm near Salto, State of São Paulo, Brazil, coffee plants two, theree four and five years old were cut near the ground level of the soil at the following growth periods: July (grow almost nihil), January (pin-head stage) and June (ripe stage). The material was divided into stem, branches, leaves and fruits and dried at 80) C and anal...
Com a finalidade de obter dados acerca do recrutamento de micronutrientes, a leguminosa foi cultivada em um Latossolo Vermelho Escuro Orto, série "Luiz de Queiroz" em Piracicaba, SP. A coleta de amostras constituidas por plantas rasteiras, foi efetuada de 15 em 15 dias a partir dos 41 dias após a semeadura. Após cada amostragem, as plantas foram separadas em folhas, caules, flores e vagens. Em cada época nas di...