Navegando Artigos - Economia, Sociologia e Tecnologia - FCA por Campus "Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal"
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ItemArtigoLodo de esgoto como fertilizante: produtividade agrícola e rentabilidade econômica(2011) Quintana, Núria Rosa Gagliardi; Carmo, Maristela Simões do [UNESP]; Melo, Wanderley José de [UNESP]; Universidade Estadual Paulista (Unesp); Universidade Estadual de Campinas (UNICAMP)The purpose of this review is analyzing provision of agricultural sewage sludge as a biofertilizer in terms economic and productive rather than being deposited in landfills. Sewage sludge is considered an excellent biofertilizers because of organic matter amount and macro and micronutrients contained in them, thus contributing to the decreased industrial fertilizers use and reduction in fertilization costs. Its agricultural recycling must obey the quality rules of this material, soil type, environmental constraints, application rate and crop recommended. Landfills ensure the correct destination when this waste unsuitable for other uses or excess demand. For this residue become considered raw material, studies are needed that confirm the safety of its use to the environment and human health. ItemArtigoRentabilidade efetiva e rentabilidade total do cultivo de milho adubado com lodo de esgoto(2012) Quintana, Núria Rosa Gagliardi [UNESP]; Melo, Wanderley José de [UNESP]; Carmo, Maristela Simões do [UNESP]; Universidade Estadual Paulista (Unesp)In this study, we calculated effective and total economic rentability about corn production fertilized with sewage sludge. The corn was cultivated on a minimal tillage treatment in a field experiment. The trial was carried out during 2002/2003, set up on an oxisol area of 1/16 ha The farming operations were detailed to specify machinery, equipment, manpower, materials consumed and hours worked. Operating costs, calculated accordingto the methodology of the IEA, were subtracted from revenues, resulting in profitability. Results indicate that the application of sewage sludge is economically profitable.