Now showing items 21-30 of 5038
On the spatial and temporal dependence of CO2 emission on soil properties in sugarcane (Saccharum spp.) production
(Elsevier B.V., 2015-05-01)
CO2 production in soil is the result of biological processes, such as the decomposition of organic matter and the respiration of roots and soil organisms. It also depends on the physical, chemical and biological properties ...
Current status, uncertainty and future needs in soil organic carbon monitoring
Increasing human demands on soil-derived ecosystem services requires reliable data on global soil resources for sustainable development. The soil organic carbon (SOC) pool is a key indicator of soil quality as it affects ...
EFFECTS OF STERILIZATION AND TEMPERATURE ON THE DECREASE KINETIC OF PHOSPHORUS BIOAVAILABILITY IN TWO DIFFERENT SOIL TYPES
(Chilean Society of Soil Science/Sociedad Chilena de la Ciencia del Suelo, 2011)
Light acidification in N-fertilized loess soils along a climosequence affected chemical and mineralogical properties in the short-term
(Elsevier Science, 2015-12)
Some evidences indicate that N-fertilization of crops decreased pH values of loess soils of the Argentinean Pampas in the last decades. We analyzed the A-horizons of four N-fertilized (F) and non-fertilized (NF) paired ...
Alteration of soil properties through a weathering sequence as evaluated by spectral reflectance
In the study of physical, chemical, and mineralogical data related to the weathering of soils and the quantification of their properties, remote sensing constitutes an important technique that, in addition to conventional ...
Carbon dioxide emissions after application of tillage systems for a dark red latosol in southern Brazil
(Elsevier B.V., 2001-11-01)
Soil tillage may influence CO2 emissions in agricultural systems. Agricultural soils are managed in several ways in Brazil, ranging from no tillage to intensive land preparation. The objective of this study was to determine ...
Decomposition of 14C-labeled lignins, model humic acid polymers, and fungal melanins in allophanic soils
During 1 yr, CO2-C losses from 7 agricultural soils containing 0.5-1.5% organic C ranged from 70 to 243 mg 100 g - 1 while losses from three allophanic soils containing 4.9-8.9% organic C varied from 92 to 191 mg. Losses ...
Phytogeographic retrospective in ecotonal areas guided by soil attributes
Re-establishing deforested ecosystems to pre-settlement vegetation is difficult, especially in ecotonal areas, due to lack of knowledge about the original physiognomy. Our objective was to use a soils database that included ...
Using Imaging Spectroscopy to study soil properties
(ELSEVIER SCIENCE INC, 2009)
Imaging Spectroscopy (IS) is a promising tool for studying soil properties in large spatial domains. Going from point to image spectrometry is not only a journey from micro to macro scales, but also a long stage where ...
Management Impacts on Soil Organic Matter of Tropical Soils
(Soil Sci Soc Amer, 2015-01-01)
Increased soil organic matter (SOM) improves the cation exchange capacity of tropical weathered soils, and liming is required to achieve high yields in these soils. Despite a decrease in SOM in the short term, liming may ...