نتایج جستجو برای: soil organic matter is an indicator of soil

تعداد نتایج: 21862657  

خزائی, علی , محبوبی , علی ‌اکبر , مصدقی, محمد ‌رضا ,

Soil physical and chemical properties, and test conditions might affect soil structural stability. In this study, the effects of test conditions as well as intrinsic soil properties on structural stability were investigated for selected soils from Hamedan Province. Mean weight diameter (MWD) and tensile strength (Y) of aggregates were determined by wet sieving method and indirect Brazilian test...

2012
Nuria Bonilla José A. Gutiérrez-Barranquero Antonio de Vicente Francisco M. Cazorla

The practice of adding organic amendments to crop soils is undergoing resurgence as an efficient way to restore soil organic matter content and to improve soil quality. The quantity and quality of the organic matter inputs affect soil physicochemical properties and soil microbiota, influencing different parameters such as microbial biomass and diversity, community structure and microbial activi...

2014
Yan Lu Hongwen Xu

The objectives of this study were to test the effects of soil temperature, flooding, and raw organic matter input on N2O emissions in a soil sampled at Hongze Lake wetland, Jiangsu Province, China. The treatments studied were-peat soil (I), peat soil under flooding (II), peat soil plus raw organic matter (III), and peat soil under flooding plus organic matter. These four treatments were incubat...

2012
David A. Perry Robert P. Griffiths Andrew R. Moldenke Stephanie L. Madson

We compared forest floor depth, soil organic matter, soil moisture, anaerobic mineralizable nitrogen (a measure of microbial biomass), denitrification potential, and soil/litter arthropod communities among old growth, unthinned mature stands, and thinned mature stands at nine sites (each with all three stand types) distributed among three regions of Oregon. Mineral soil measurements were restri...

Due to the harsh environmental conditions in arid and semi-arid area of country, it is essential to assess the factors affecting the vegetation in such areas. This study aimed to investigate the effect of some soil physicochemical properties (including texture, bulk density, moisture, organic matter, carbon, nitrogen, potassium, lime, sodium, electrical conductivity and pH) on Haloxylon persicu...

Different land uses have various effects on the changes of soil properties. The purpose of this study was to evaluate the effects of natural forest, needle-leaved plantation and rangelands of central Alborz on new indices of soil quality (i.e. organic matter stratification, carbon management index and soil biological activities). For this purpose, eight samples from organic layer (litter) and m...

Journal: :تحقیقات جنگل و صنوبر ایران 0
جواد اسحاقی راد استادیار دانشکده منابع طبیعی دانشگاه ارومیه قوام الدین زاهدی امیری دانشیار، دانشکده منابع طبیعی دانشگاه تهران محمدرضا مروی مهاجر استاد، دانشکده منابع طبیعی دانشگاه تهران اسداله متاجی استادیار، واحد علوم و تحقیقات دانشگاه آزاد اسلامی

راش، گونه­های علفی، حاصل خیزی خاک، آنالیزهای چندمتغیره. this study was carried out in carpino-fagetum orientalis, rusco-fagetum orientalis,fagetum oriental and alno-fagetum orientalisforest communities of namkhaneh, gorazbon and chelir districts of kheiroudkenar forest. the aim of the research was investigation on relationship between understory vegetation and soil condition and to determine th...

Journal: :international journal of environmental research 2012
u. song b. waldman e.j. lee

sanitary landfills, created for the disposal of solid waste, usually are developed into parks afterthey are closed. however, soil amelioration with organic matter is usually needed to restore fertility andpromote revegetation. sewage sludge creates a massive waste disposal problem. the use of composted sewage sludge (biosolid) as a soil conditioner might restore the soil fertility at landfill s...

Journal: :international journal of advanced biological and biomedical research 2014
fatemeh madadian chaleshtory naser honarjoo ahmad jalalian

soil organic carbon has been the most important soil quality measurement factors and has intense relation with soil physical, chemical and biological characteristics. organic matter and its components are important factors of soil aggregates constitution and stability and play significant role in its structure.so, this research has been done for achieving this purpose. this area is arounding sa...

ژورنال: علوم آب و خاک 2009
بیگی هرچگانی, حبیب اله , صالحی, محمدحسن , مهاجر, رضا,

Soil fertility measures such as cation exchange capacity (CEC) may be used in upgrading soil maps and improving their quality. Direct measurement of CEC is costly and laborious. Indirect estimation of CEC via pedotransfer functions, therefore, may be appropriate and effective. Several delineations of two consociation map units consisting of two soil families, Shahrak series and Chaharmahal seri...

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