Urban waste compost is an organic manure frequently used in horticultural areas. Thus, the objectives of this study were to evaluate the effects of urban waste compost on soil fertility, on lettuce production and on nutrient accumulation in plants. The experiment was carried out in a greenhouse using PVC columns. It was used a randomized block design with five treatments and eight replications. The treatments consisted of five urban waste compost rates (0; 30; 60; 90; and 120 t ha-1). The columns […]

The effects of urban waste compost (UWC) on the chemical properties of a Rhodic Eutrustox and on the nutrition of gladiolus (Gladiolus grandiflorus) were studied. The gladiolus plants variety Red Beauty were field cultivated from August 1999 to January 2000. The experiment was set up in a randomized complete block design with six treatments and four replications. The treatments were: T1 – mineral fertilizer (MF); T2 – 10.0 t ha-1 of UWC; T3 – 20.0 t ha-1 of UWC; T4 – MF + 15.0 t ha-1 of UWC; […]

Before recommending biosolids at large scale for forest plantations it is necessary to have an ample understanding of its effects on soil and plant. Thus, it was evaluated the soil fertility, nutritional status and growth of a Eucalyptus grandis plantation fertilized with biosolid (bios). The trial was established at the Experimental Station of Forest Sciences of Itatinga – ESALQ/USP (São Paulo State, Brazil). The experimental design was in complete randomized blocks, with 4 replicates. There were nine treatments, namely: (1) control; […]

Heavy metal components in solid urban waste composts have been one of the main causes of concern in relation to its use on agricultural soils. On this background, a field experiment was carried out to study the effects of successive compost application on Cd, Cr, Cu, Ni, Pb, and Zn contents in a Typic Hapludox, in sugarcane plants, as well as on the phytoavailability of these metals as assessed by chemical extractors (DTPA, 0,1 mol L-1 HCl and Mehlich-3). The […]

A green house experiment was conducted to investigate the effects of the application of solid urban waste compost at a rate of 30 g dm-3 (60 t ha-1), on 21 acid and five alkaline soils in relation to their organic carbon, total nitrogen, available phosphorous and sulfur contents. Compost from the São Matheus Treatment Plant (São Paulo, Brazil) was applied with or without dolomitic lime and mineral fertilizers. In alkaline soils, lime was substituted by gypsum. The experiment was carried […]

In order to evaluate the effect of increasing biosolid rates (0, 5, 10, 15, 20 and 40 t ha-1, dry base) on some chemical soil attributes, and macro and micronutrient growth and uptake in Eucalyptus grandis stands, an experiment was established at the Experimental Station of Itatinga of ESALQ/USP, Itatinga (SP). Some treatments had additional application of K and P, and, as reference, only mineral fertilization was applied in one of them as practiced in some high technology forest companies […]

This study was carried out to assess the influence of winter plant cover on the grain yield in the bean/maize crop rotation in a Structured Terra Roxa soil in the state of Santa Catarina. The plant cover consisted of an association of black oats (Avena stirgosa Schreb) with pasture turnip (Raphanus sativus L.) and organic fertilization with poultry manure and mineral fertilization. The soil cover influenced the grain yield in the bean plant, but not the maize. This may have […]

A greenhouse experiment was carried out to evaluate the effect of urban waste compost on soil fertility and on total and extracted contents (DTPA 0.005 mol L-1 pH 7.3) of the elements Fe, Mn, Zn and Ni in a sandy Red-Yellow Podzolic soil (Ultisol). The yield of dry matter of Sorghum bicolor plants and the content of P, K, Ca, Mg, Fe, Mn, Zn and Ni were evaluated in plant tops as a function of compost rates of 0, 12.5, […]

Responses to phosphate fertilizing by vernalized garlic (Allium sativum, variety Roxo Perola de Caçador) were studied. To determine the calibration curve for phosphorus extracted with ion exchange resin, five soils of different textural groups, with and without organic fertilizer, were utilized. Two experiments, placed in 16 L pots, were carried out under greenhouse conditions, in the county of Botucatu, State of São Paulo, Brazil, from May to October, 1995 and 1996. Each of these experiments consisted of five soils at […]