Volume 22, Number 3, 1998

One of the alternatives to diminish the urban waste volume to be discarded is the composting process, whose final product – the compost – can be used in agriculture. However, these composts may present toxic substances for humans, i.e. heavy metals. The aim of this study was to evaluate the chemical composition of waste composts from six Brazilian capitals. Samples of cattle manure, lime, ordinary phosphate, potassium chloride, and urea were analysed to compare with the waste compost. Determinations of […]

The rates and the application time of nitrogen (N) may influence the agronomic characteristics of irrigated wheat (Triticum aestivum L.) and, consequently, grain yield. Two experiments were conducted at the Experimental Station of the Universidade Federal de Viçosa, located in Coimbra-MG, Brazil, during the years 1995 and 1996. The treatments consisted of a combination of four rates of N (30, 60, 90 and 120 kg ha-1), four rates of parceling (total rate at 20 days after emergence (DAE); ½ at […]