Successive applications of pig litter to the soil surface can increase the phosphorus (P) content and alter its adsorption, promoting P transfer to surface or subsurface waters. The purpose of this study was to evaluate P accumulation and the pollution potential of a soil after application of pig litter. In March 2010, eight years after the installation of an experiment in Braço do Norte, Santa Catarina, SC, Brazil, on a Typic Hapludult, soil was sampled (layers 0-2.5, 2.5-5, 5-10, 10-15, […]

The use of manure in agricultural system is a possibility to dispose of the waste generated in animal production, but improper use can cause environmental problems. The general objective of this study was to evaluate carbon and nitrogen concentrations and losses in runoff in four doses of liquid dairy manure (0, 60, 120, 180 m3 ha-1 yr-1) applied to a silt clay loam Oxisol with 13 % slope, in no-till with soybean, oat, corn, and wheat in crop rotation. The […]

Swine manure is a good nutrient source, but may have a negative impact on the environment when inadequately used. The aim of this work was to evaluate changes in properties of soils under no-till grain production and long-term swine manure fertilization. Soil samples from three representative soils types (Oxisol, Inceptisol and Leptosol) from Western Santa Catarina, Southern Brazil, were collected under no-tillage cultivation and surface application of swine manure for about 15 years and over 20 years. Samples from areas treated with […]

Dairy cattle in South Brazil is raised mainly in a system based on partial or total confinement of the animals, generating a significant amount of residues. The residues have been used as the only nutrient source or associated to mineral sources in grain or silage production. Their effect on soil characteristics has however been little explored. This study was conducted to evaluate the influence of fertilization rates with liquid dairy cattle manure associated with mineral fertilizer on P, K, C, […]

The residues of swine production have a great potential as soil chemical conditioners for crop production The purpose of this study was to evaluate: (a) corn yield, after application of swine manure and increasing doses of soluble copper in an Eutroferric Red Latosol with two organic matter contents (34,09 and 8,60 g dm-3), (b) the influence of soil copper and organic matter content on copper absorption and translocation to corn shoots. The study was set up in a greenhouse of […]

Despite the available knowledge on erosion of cultivated lands, there are situations of soil use and management that need more detailed studies. Based on that, this research work was accomplished with the objective of evaluating soil erosion by rainfall from an area of native pasture cropped with corn (Zea mays L.), under reduced-tillage and no-tillage, and mineral (chemical fertilizer containing N and P) and organic (poultry litter) fertilization. The study was developed in the field, at the Agriculture Experimental Station […]

Sewage sludges contain high levels of organic N. If these residues are applied in excess to soils, there is the risk of polluting the groundwater with nitrate, a product of N mineralization. For this reason, one of the criteria underlying the determination of the maximum N application rate to soils is the crop available N. This paper presents the results of a 224 day laboratory leaching study on organic N mineralization of anaerobically-digested sewage sludges from two treatment plants, namely Franca […]

This study aimed to evaluate the influence of fertilization doses of liquid dairy manure combined with mineral fertilizer on the chemical properties of a Brown Oxisol, in no-tillage system and winter and summer crop rotation (sorghum/black-oat/corn/ryegrass/corn/ryegrass), for silage production, in the layers 0-5, 5-10, 10-30, 30-50 and 50-80 cm. The treatments were distributed in three randomized blocks, divided in 12 plots per block, in a 3 x 4 factorial arrangement, with three mineral fertilizer levels (0, 50 and 100 % […]

In western Santa Catarina state, Brazil, swine manure is commonly used as nutrient source for crops. The aim of this study was to evaluate the effects of swine manure on chemical attributes of a Red Latosol (Hapludox), cultivated with corn under no-tillage conditions. Two experiments were carried out using different rates of liquid swine manure (0, 40 and 115 m-3 ha-1 year-1), applied annually at corn sowing, from 2000 to 2004, in Chapecó and from 2001 to 2004, in Guatambu. After the last […]

Studies about nitrogen and carbon mineralization in soils amended with urban waste compost are important to evaluate the reactions of this waste in soil and to define the best rates for crops. Two experiments were carried out under laboratory conditions to evaluate carbon and nitrogen mineralization in an Ultisol fertilized with urban waste compost. The Ultisol first experiment had a completely randomized design, with five urban waste compost rates of 0, 30, 60, 90, and 120 t ha-1 and three replicates. In […]