Synthetic aperture radar (SAR) is a remote sensing technique for mapping of soil moisture with high spatial resolution. C-band SAR can resolve features at field scale, or better, but responds to only within the top 1 2 cm soil. When validating SAR-derived products against standard in situ measurements 5 10 depth, greater variability surface may be inaccurately categorized as measurement error. ...

Interest in tillage impacts on sequestration of soil organic carbon (SOC) has increased greatly during recent years. The use of reduced and no-tillage (NT) practices generally increases the SOC concentration in surface few centimeters when compared to conventionally tilled soils. However, use of conservation tillage does not always result in increased SOC storage overall. The effects of sample ...

Wetland soils are heterogenous in nature, and biogeochemical properties show different spatial autocorrelation structures that translate into fineand coarse-scale spatial patterns. Understanding these patterns and how they relate to other ecosystem properties (e.g., vegetation) is critical to restore wetlands impacted by nutrient influx. Our goal was to investigate Water Conservation Area 2A, a...

the extensive use of pesticides in agriculture is compromising soil and water quality. one major concern is protecting water resources from contamination. the main objective of this research was measuring 2,4- d in a silty clay soil and simulating temporal transportation of this herbicide in soil using a leachp model, in a corn root zone field. 2,4- d was applied at 3.5 kg a.i./ha, followed by ...

this study aimed to investigate the effect of habitat kind on soil seed bank characteristics viz. density diversity, richness and similarity between seed bank and above ground vegetation. two different habitats (grassland and forest) were selected in vaz, mazandaran province. the grassland habitat located in the upper end of the forest habitat, adjacent to each other. then in each habitat, 7 tr...

The use of cover crops (CC) during the agricultural fallow period has been shown to help alleviate soil compaction and provide stabilizing effects against erosion. These benefits are particularly important as many silty, loess-derived soils major land resource area (MLRA) 134, Southern Mississippi Valley Loess, have large erosion potentials. This study evaluated CC no-cover crop (NCC) treatment...

ganic C (SOC). Soils of the southeastern United States of America, particularly sandy Coastal Plain soils, have Soil organic matter (SOM) is of primary importance for maintaining inherently low SOC contents (typically below 1%, Hunt soil productivity, and agricultural management practices may signifiet al., 1982). Consequently, small changes in the SOM cantly influence SOM chemical properties. ...

Maximizing utilization of effluent nutrients by forage grasses requires a better understanding of irrigation rate and timing effects. This study was conducted in 1998 and 1999 on a Vaiden silty clay (very-fine, smectitic, thermic Aquic Dystrudert) soil to determine the effects of swine lagoon effluent irrigation rate and timing on bermudagrass [Cynodon dactylon (L.) Pers.] growth, nitrogen (N) ...