this study determined some spectral characteristics and relationship between landsat spectral reflectance and soil surface color in the arid region of iran (kashan). the study carried out in the kashan area that covers 90000 ha. consisting of mountain, hills and flood plain. enhanced thematic mapper (etm+) data collected on july 2002 were used for this research. the color composite images produ...

plant litter is an important factor for soil conservation and sustainability that could modify soil chemical properties and increase the plant biomass production. the aim of this research was to compare plant litter chemical composition and its effects on soil properties in three species including hordeum bulbosum, poa bulbosa, bromus tectorum. first, soil samples were taken in the depth of 0-3...

Slope exposure is known to affect soil biogeochemical processes in mountainous forest ecosystems, but little attention has yet been paid its influence at a aggregate scale. Therefore, we evaluated the effects of slope (north- vs south-facing slope) on physico-chemical and microbiological properties bulk dry-sieved water-stable size fractions both organic (OF) mineral (AE) horizons an Italian al...

analyses and thermal infrared channels 4 and 5 noaa- avhrr images. this research was carried out in lut desert located in center of sub-tropical divergence dominant in' iranian plateau. the physical and thermal properties of the various desert surfaces have been determined using correlation relationships between the desert variables including: dark sand, normal sand, marl, saline soil, soil dep...

Soil consists of very complex, inter-related community microorganisms which interact with one another and plants animals, forming a complex web biological activity. The microbes determine health potential soil to perform multitude ecosystem processes, depend on the composition functioning. microbial structure functions in are influenced by physico-chemical properties soils. Abiotic controls lik...

1. A considerable advance has been made in the study of the fulvic extract of soil organic matter. A new method has been introduced whereby the fulvic extract is separated by a selective adsorption technique into four distinct fractions. 2. These fractions have been obtained from the fulvic extracts from four widely diverse types of soil. 3. A preliminary examination of the chemical properties ...

The review summarizes the literature on role of soil microorganisms physico-chemical properties and plant growth. Most investigators confirmed that Soil microbial activity is very important to improve health for Healthy crop growth because play an in building a complex link between plants soil. microbes are dynamic component performed many beneficial functions system. Microbes help different bio...