Buscar
Mostrando ítems 31-40 de 571
Phosphorus fractions in Brazilian Cerrado soils as affected by tillage
(Elsevier B.V., 2009-09-01)
No-tillage systems lead to physical, chemical and biological changes in soil. Soil fertility is responsive to changes in tillage as it depends on nutrient status, soil water content and biological characteristics. This ...
Phosphorus fractions in Brazilian Cerrado soils as affected by tillage
(Elsevier B.V., 2009-09-01)
No-tillage systems lead to physical, chemical and biological changes in soil. Soil fertility is responsive to changes in tillage as it depends on nutrient status, soil water content and biological characteristics. This ...
Phosphorus Fractions in Soil With Organic and Mineral Fertilization in Integrated Crop-Livestock System
(Soc Brasileira De Ciencia Do Solo, 2019-01-01)
Use of organic fertilizers in integrated crop-livestock (iCL) systems may affect soil phosphorus fractions. This study aimed to determine phosphorus fractions in the soil under the iCL system after six years of application ...
Relative lability of trace metals complexed in aquatic humic substances using ion-exchanger cellulose-hyphan
(1997-12-01)
The purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ...
Relative lability of trace metals complexed in aquatic humic substances using ion-exchanger cellulose-hyphan
(1997-12-01)
The purpose of this paper is to characterize the lability/inertness metal fractions complexed by aquatic humic substances (HS) in relation to pH, complexation time, and HS concentration. HS were preconcentrated by ...
Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
(Sociedad Chilena de la Ciencia del Suelo, 2018-03)
The objectives of this study were i) to measure the nitrogen (N) mineralization potential; ii) to evaluate N mineralization indices and labile soil organic matter (SOM) fractions, and iii) to analyze their interrelationship ...
Evaluation of diffusive gradients in thin films technique (DGT) for measuring Al, Cd, Co, Cu, Mn, Ni, and Zn in Amazonian rivers
(Springer, 2014-02-01)
Studies concerning the lability and bioavailability of trace metals have played a prominent role in the search for contamination of water resources. This work describes the first application yet of the diffusive gradients ...
Winter cover crops in soybean monoculture: Effects on soil organic carbon and its fractions
(Elsevier Science, 2016-08)
The current agricultural production systems in the Pampas Region have been significantly simplified by cultivating large land areas under no tillage (NT), where soybean is the predominant crop. These systems with long ...
Phosphorus fractions as a function of the use of phosphate fertilizers in different soil classesFrações de fósforo em função do uso de fertilizantes fosfatados em distintas classes de solo
(2021-08-05)
Most Brazilian soils have low natural fertility. The main characteristic is phosphorus (P) deficiency and high P adsorption capacity. This creates the need to add phosphate mineral fertilizers, organic or organomineral. ...