2 results

Recovery of a degraded soil with green manure and sewage sludge

Aline Emy Kitamura, Marlene Cristina Alves, Luiz Gustavo Akihiro Sanches Suzuki, Antonio Paz Gonzalez

01/Feb/2008

The inadequate use of soils induces alterations, exhausting the productivity, and resulting in growing areas of degraded soil. This study had the objectives of a) studying alternatives to promote the formation of the A horizon of a degraded soil through the use of green manure, sewage sludge, and cultivation of a native tree species; and b) selecting soil quality indicators to detect the alterations in the surface layer. Evaluations were executed annually. The experimental design was in random blocks with […]

Soil quality indicators in organic and conventional cultivation systems in the semi arid areas of Ceara – Brazil

Herdjania Veras de Lima, Teógenes Senna de Oliveira, Maria Matutina de Oliveira, Eduardo de Sá Mendonça, Pedro Jorge Bezerra Ferreira Lima

01/Oct/2007

Soil quality can change along the time due to natural events or anthropic activities. The use of organic management practices reduces soil tillage and favors the recovery of soil physical and chemical properties. The objective of this study was to compare the physical, chemical and biological properties of cultivated soils under organic system or conventional tillage system. Six organic and three conventional cultivated areas were selected and soil samples collected in the layers 0-10, 10-20 and 20-30 cm. Physical, chemical […]