The soil use not always result in an ecological sustainable system. An intense and inadequate soil use leads to soil degradation. In this sense, this study aimed to investigate the influence of sewage sludge on the recovery of physical properties of a degraded Oxisol, cultivated for 2.5 years with eucalyptus (Eucalyptus citriodora Hook) and Brachiaria grass (Brachiaria decumbens), in Selvíria, MS, Brazil. Six treatments were evaluated in an experiment in a randomized block design with four replications: (1) Savannah; (2) […]

Eucalyptus and acacia species are widely used in agrosilviculture and reforestry practices. In order to evaluate the reconstitution of organic soil layers – i.e. the humic horizons -and establish relationships to the soil properties, the holorganic and hemiorganic horizons were sampled under Acacia mangium and Eucalyptus grandis plantations. These plantations lie in the tertiary tableland region in the North of Espírito Santo State, Brazil, and are part of the Natural reservation Area of the Vale do Rio Doce Company. Samples […]

Soil and water losses by erosion were measured in forest ecosystems and were related to the calculated maximum tolerable soil losses. Main soil classes in the Coastal Plains of the region of Aracruz (ES) were studied, with the aim of obtaining indicators of management adequacy for this production system. The experimental plots were set on loamy/clayey Yellow Argisol (PA1), Haplic Plinthosol (FX), and moderately rocky Yellow Argisol (PA8). The slopes ranged from 2-8  %, 1-12  %, and 29-36  %, for each soil class. […]

This study analyzes homogenous stands of Eucalyptus grandis and Pinus caribaea var. hondurensis in different growth stages as well as fragments of natural vegetation of “Cerrado” and Atlantic Forest. The climatic, edaphic and floristic conditions of the chosen areas are representative of the native forests and forest plantations established at the Western plateau of the state of São Paulo. Soil samples (0-15 cm) were incubated under aerobic and anaerobic laboratory conditions by successive periods of 3, 3, 4, 4, 6 […]

With the objective to evaluate the desorption of phosphorus by silicon in surface layers of a Dark-Red Latosol (Oxisol) under cerrado vegetation and Cambisol (Inceptisol), under open cerrado vegetation at Campos das Vertentes physiographical region State Minas Gerais, experiments were carried out under greenhouse conditions at the Soil Science Department of the Federal University of Lavras, Minas Gerais state, Brazil, from August 1997 to May 1998. Each soil was submitted to three sequential incubations: (a) CaCO3 + MgCO3 to maintain […]

Shoot growth, phosphorus uptake (PC) and utilization efficiency (PUE) of Eucalyptus grandis seedlings associated to Glomus etunicatum (Ge) and, or, Pisolithus tinctorius (Pt), in different P rates and soil water potentials (ψ), were evaluated in a greenhouse experiment with two geminated pots, using a split-root technique. One of the pots in the geminated set contained the treatments, arranged in a factorial scheme of two P rates (P60 and P120, corresponding to additions of 60 and 120 mg dm-3 soil), three […]

Data from 1.213 trees of Eucalyptus grandis x E. urophylla hybrids were collected between 1988 and 1994 from the Aracruz Celulose S.A. commercial plantation in the State of Espírito Santo, Brazil. Data on stand productivity and macronutrient concentration in four tree components (leaf, branch, stembark and stemwood) were used to determine the reference values of nutrient concentration by the methods of Mathematical Chance and DRIS. The formula of Jones and the population distribution based on age and selection of the […]

This study was carried out in the field to evaluate root colonization of three Eucalyptus grandis x E. urophylla hybrids by mycorrhizal fungi as affected by soil conditions. Roots of three clonal trees, each five year old, were evaluated in regard to colonization by ectomycorrhizal and by arbuscular mycorrhizal fungi, in three areas of the State of Espírito Santo, Brazil, at four different times (July and October, 1992; January and April, 1993). The percentage of mycorrhizal colonization was dependent on […]

The aim of this study was to test the effect of three methods of estimating the DRIS indices on the nutritional status of eucalipt plantations, based on the grouping of these indices by the Nutrient Application Potential Response Method. Nutrient concentrations of tree leaf, branch, stembark and stemwood, determined in 1986 trees of Eucalyptus grandis x E. urophylla hybrids growing in the States of Espírito Santo and Bahia, Brazil, were evalued by the methods of Jones, Elwali and Gascho, and […]