Results 21 to 30 of about 65,616 (64)
Segurança alimentar de hortaliças orgânicas: aspectos sanitários e nutricionais
, 2010 The search for organic foods is expressive worldwide due to the population awareness about the health risks resulting from the presence of chemical residues in food.
Kettelin Aparecida Arbos +3 more
semanticscholar +1 more source
Percepção ambiental dos produtores e qualidade do solo em propriedades orgânicas e convencionais
, 2011 O sistema orgânico de producao deve resultar na utilizacao mais racional dos recursos naturais, sobretudo do solo. Os produtores orgânicos devem adotar praticas conservacionistas, alem de atender a outros principios deste sistema de producao.
Araci Kamiyama +3 more
semanticscholar +1 more source
, 2007 The advance of the agricultural frontier, characterized by the conversion of natural ecosystems into cultivated areas, was intensified in the last decades.
O. J. P. Rangel, C. Silva
semanticscholar +1 more source
Esquema para interpretação de espectros de substâncias orgânicas na região do infravermelho
, 2004 This article decribes a simple and systematic method to interpret an infrared spectrum using a flow chart to elucidate the structure of a simple organic compound. It is aimed at undergraduate courses of organic chemistry to make beginners proficient. The
W. Lopes, Miguel Fascio
semanticscholar +1 more source
, 2002 This study was carried out to evaluate the effect of cultivation systems on soil carbon and nitrogen contents and on the distribution of light and heavy fractions of soil organic matter (SOM). Density and particle-size fractionations were used to isolate
A. Freixo +4 more
semanticscholar +1 more source
Levantamento das cargas orgânicas lançadas nos rios do estado de São Paulo
, 2002 Based on population data provided by the 2000 IBGE census, the volume of domestic sewage, the volume of treated sewage, the potential and remnant domestic sewage loads and the equivalent carbon and nitrogen loads were estimated for each one of the 645 ...
L. A. Martinelli +8 more
semanticscholar +1 more source
Produtividade de milho solteiro ou em aléias de gliricídia adubado com duas fontes orgânicas
, 2007 The objective of this work was to evaluate biomass productivity of maize, intercropped or not with gliricidia (Gliricidia sepium), and to evaluate the effect of manure and gliricidia prunnings fertilization on maize and spontaneous vegetation biomass ...
Aldrin Martin +5 more
semanticscholar +1 more source
, 2002 An experiment was carried out to evaluate morphophysiological aspects of Mombacagrass growth after defoliation. Defoliation treatments were performed when the number of green completely expanded leaves on main tiller had stabilized around 3.
C. A. D. M. Gomide +3 more
semanticscholar +1 more source
El continuo crecimiento de la agricultura orgánica: Orgánico 3.0
, 2020 espanolEl desarrollo de la produccion organica en el mundo se divide en tres etapas para facilitar su analisis. Organico 1.0. La gestacion del movimiento, con pensadores, en su mayoria agricultores, que producen alimentos acorde con los principios ...
Gabriela Soto
semanticscholar +1 more source
, 2006 Urban sewage sludge, most organic from water treatments have increased in the last years in Chile. This has generated the need of their final disposition.
B. JoséCuevas +3 more
semanticscholar +1 more source