Citrus rootstocks have a strong influence on shoot mineral nutrition and consequently on the adaptation of citrus trees to adverse soil conditions. Since citrus yield is often limited by low P availability, a greenhouse study was carried out to evaluate the effects of P application in the nutrient solution (0.0125; 0.05; 0.2 and 0.8 mmol L-1) on growth and P nutrition of the citrus rootstocks varieties (‘Rangpur’ lime, ‘Swingle’ citrumelo, ‘Cleopatra’ and ‘Sunki’ mandarin). After 100 days of P treatments, […]

The relationships between nutrient contents and indices of the Diagnosis and Recommendation Integrated System (DRIS) are a useful basis to determine appropriate ranges for the interpretation of leaf nutrient contents. The purpose of this study was to establish Beaufils ranges from statistical models of the relationship between foliar concentrations and DRIS indices, generated by two systems of DRIS norms – the F value and natural logarithm transformation – and assess the nutritional status of cotton plants, based on these Beaufils […]

More productive potato cultivars possibly require larger quantities of micronutrients, but in Brazil there is little information on extraction and exportation of micronutrients by the commonly used potato cultivars. The objective of this study was to evaluate extraction and exportation of micronutrients by the potato cultivars Ágata, Asterix, Atlantic, Markies, and Mondial. The experiment was conducted in Itaí, São Paulo State, Brazil, in the 2008 winter growing season on an Oxisol. Plots consisted of the five potato cultivars and subplots […]

The determination of nutrient absorption during the growth cycle is essential to determine the periods in which these elements are most required and the correct amounts that should be provided for potato, but for most cultivars used in Brazil the information is extremely scarce. The objective of this study was to evaluate absorption and exportation of the macronutrients N, P, K, Ca, Mg, and S by the potato cultivars Ágata, Asterix, Atlantic, Markies, and Mondial. The experiment was conducted in […]

To synchronize nutrient availability with the requirements of eucalyptus during a cultivation cycle, the nutrient flow of this system must be well understood. Essential, for example, is information about nutrient dynamics in eucalyptus plantations throughout a cultivation cycle, as well as impacts on soil nutrient reserves caused by the accumulation and subsequent export of nutrients via biomass. It is also important to quantify the effect of some management practices, such as tree population density (PD) on these fluxes. Some nutrient […]

The objectives of this study were to evaluate the biomass production and nutritional efficiency of seedlings of eucalyptus clones in nutrient solution, to characterize the macronutrient uptake, translocation and utilization efficiency. The experiment was carried out in a greenhouse using seedlings of six eucalyptus clones (58, 386, GG100, I042, I144, and VM1), grown in nutrient solution. The treatments, represented by the six clones, were distributed in a completely randomized design, with four replications. The eucalyptus clones differed from each other […]

Detrimental effects of glyphosate on plant mineral nutrition have been reported in the literature, particularly on Mn uptake and redistribution. However, in most of the experiments conducted so far glyphosate-susceptible plants were used. Effects of glyphosate on Mn absorption kinetics, accumulation, and distribution within the plant, as well as soybean response to Mn as affected by glyphosate were studied in three experiments. In the first experiment, in nutrient solution, the effect of glyphosate on soybean Mn uptake kinetic parameters (Imax, […]

A striking characteristic of soils under savanna vegetation is the low natural fertility, as in soils in the Upper Paranaíba region – MG. This characteristic is aggravated by the use of low fertilizer quantities, which may cause nutritional imbalance in plants. The objective of this study was to evaluate the nutritional status of coffee plants in the Upper Paranaíba region – MG, using the integrated system for diagnose and recommendation (DRIS) to interpret leaf analyses and apply the fertilization response […]

Among the different methods of assessing the nutritional status of plants, DRIS and CND have the main purpose of ranking the limiting nutrients. This study aimed to develop DRIS and CND norms and compare the diagnoses of these methods in evaluations of cotton cash crops in the region of São Desidério, state of Bahia, Brazil. The database consisted of the total nutrient content of 65 whole leaf samples and seed cotton yield of plots with an average size of 120 […]

The nitrogen source applied to crops may alter some soil properties such as pH, resulting in changes in the soil nutrient availability and plant nutrient uptake. Manganese (Mn), which can influence the plant susceptibility to diseases, may even affect host-pathogen relationships. The objective of this study was to evaluate the effect of soil application of two N sources and five Mn doses on the severity of the wheat spot blotch disease. Additionally, shoot and root dry matter production, plant Mn […]