Computer models have been used to assess soil organic carbon (SOC) stock change. Commonly, models require to determine soil bulk density (Db), a variable that is often lacking in soil data bases. To partly overcome this problem, pedotransfer functions (PTFs) are developed to estimate Db from other easily available soil properties. However, only a few studies have determined the accuracy of thes...

Nitrate is a major contributor to water contamination, which can affect humans' and animals' health. Due to increased sewage production, growth of agricultural activities, and development of urbanization, recent years have seen an increase of Nitrate in water resources. Drinking water resources in both rural and urban areas of Jiroft City are supplied by water wells, scattered throughout the re...

From site-specific crop and soil information collected from a Missouri claypan soil field for over a decade (1993 to 2003), we implemented a precision agriculture system in 2004 with a goal of using site-specific management practices to improve farming profitability and conserve soil and water resources. The objectives of this study were to: 1) show how precision crop and soil information was u...

possibility or good guess of soil occurrence in the survey area. An interpolated map using standard interpolation Due to our imperfect knowledge of soil distributions acquired from techniques may represent an optimal guess based on field surveys, spatial uncertainties inevitably arise in mapping soils at unobserved locations. Providing spatial uncertainty information along the dataset and the i...

The aim of this paper was to verify the capability of ENVISAT/ASAR images in providing soil moisture maps of agricultural areas. SAR images were collected in two sites in Italy (Alessandria and Montespertoli) in 2003 and 2004, along with ground measurements of soil moisture and roughness. The performances of some inversion statistical algorithms (Regression, Bayes, Neural Network, Nelder-Mead) ...

Use of electromagnetic induction (EMI) sensors along with geospatial modeling provide a better opportunity for understanding spatial distribution of soil properties and crop yields on a landscape level and to map site-specific management zones. The first objective of this research was to evaluate the relationship of crop yields, soil properties and apparent electrical conductivity (ECa) at diff...

The electronically scanned thin array radiometer (ESTAR) was utilized for soil moisture mapping during the Southern Great Plains Experiment (SGP99). A retrieval algorithm was applied to obtain soil moisture from passive microwave measurements at 1.4 GHz. The algorithm was verified using ground data collected during SGP99. The results indicate a good correlation between observed and predicted so...

Soil moisture is a key parameter controlling the exchanges at the surface/atmosphere interface. This parameter, very important for the weather and climate modelling, is not well monitored at a global scale. Because of its high spatial variability, a large number of point measurements is necessary to estimate an accurate value over an area. The SMOS (Soil Moisture and Ocean Salinity) mission was...