Winter cover crops are sources of C and N in flooded rice production systems, but very little is known about the effect of crop residue management and quality on soil methane (CH4) and nitrous oxide (N2O) emissions. This study was conducted in pots in a greenhouse to evaluate the influence of crop residue management (incorporated into the soil or left on the soil surface) and the type of cover-crop residues (ryegrass and serradella) on CH4 and N2O emissions from a […]

Balanced fertilization is important for plant growth. There is little information on physic nut (Jatropha curcas L.) and tests with the fertilization of the species are very recent. This study evaluated the initial growth of physic nut seedlings in response to NPK rates to Quartzarenic Neossol in a greenhouse and estimated P and K critical soil levels and N, P and K in shoot dry matter after 120 days of evaluation. The treatments were arranged in a randomized, fractional factorial […]

In the southern region of Minas Gerais large areas are affected by gully erosion. The evaluation of soil properties in these environments is extremely important, in view of their sensitivity to changes in soil quality. The objectives of this study were to evaluate physical, chemical and biological soil properties and their relationship with vegetation in the gullies. The study examined three gullies, one on an Inceptisol and two on Oxisols- LVA1 and LVA2, in Lavras, Minas Gerais (SE Brazil). Different […]

Rice, grown in all Brazilian regions, is particularly important in the southern region, where 60 % of the total production of this cereal is raised. The rice parboiling process is a hydrothermal treatment of partially cooking the grains in the husk, improving the nutritional value. This process results in an effluent rich in organic matter and nutrients, which can be used as organic fertilizer in agriculture. In this sense, this study aimed to evaluate the quality of a soil based […]

The influence of cover crops and their management on the maintenance or improvement of soil physical quality in areas under organic production should be investigated. This study aimed to determine the influence of the cover crops sunn hemp (Crotalaria juncea), pigeon pea (Cajanus cajan (L.) Millsp), velvet bean (Mucuna aterrima), sorghum (Sorgum technicum), and fallow on physical properties of soil under organic cultivation of common bean and corn, in no-tillage (NT) and conventional tillage (CT) systems. The study was conducted […]

Research data have demonstrated that the P demand of coffee (Coffea arabica L.) is similar to that of short-cycle crops. In this context, the objective of this study was to evaluate the influence of annual P fertilization on the soil P status by the quantification of labile, moderately labile, low-labile, and total P fractions, associating them to coffee yield. The experiment was installed in a typical dystrophic Red Latosol (Oxisol) cultivated with irrigated coffee annually fertilized with triple superphosphate at […]

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 […]

Among the toxic elements, Cd has received considerable attention in view of its association with a number of human health problems. The objectives of this study were to evaluate the Cd availability and accumulation in soil, transfer rate and toxicity in lettuce and rice plants grown in a Cd-contaminated Typic Hapludox. Two simultaneous greenhouse experiments with lettuce and rice test plants were conducted in a randomized complete block design with four replications. The treatments consisted of four Cd rates (CdCl2), […]

With the development of soil classification to the fourth category level of the Brazilian Soil Classification System – SiBCS, it seeks the development and standardization of proposals for the classification of soils in 5 th and 6 th categorical levels (family and series). In this sense, this paper aims to available the viability of the humic fractions for the classification of diagnostic horizons in the 5th or 6th categorical levels (family and series) of SiBCS. For the development of the […]

The adjustment of animal quantity according to the herbage allowance is fundamental to the sustainability of natural pastures. The management of herbage allowance, besides affecting the plant species that compose the pasture, can also compromise soil properties, such as density and aggregation. This study aimed to evaluate the soil bulk density, weighted mean diameter of soil aggregates and carbon fractions under natural pasture, under varying grazing intensities for 22 years, represented by herbage allowance levels of 4, 8, 12, and […]