نتایج جستجو برای: improve soil physical and biological characteristics

تعداد نتایج: 17039354  

Journal: :Bioresource technology 2008
M Tejada J L Gonzalez A M García-Martínez J Parrado

Beet vinasse (BV), a green manure constituted by Trifolium pratense L. uncomposted (TP) and composted with beet vinasse (at 1:1 rate, (TP+BV)1, and 2:1 rate, (TP+BV)2) at 10t organic matter ha(-1) rate were applied during a period of four years for purpose of restoration of a Xelloric Calciorthid located near Seville (Guadalquivir Valley, Andalusia, Spain). The effect on the plant cover, soil p...

Journal: :تحقیقات مهندسی کشاورزی 0
امیر صمدی استادیار گروه مهندسی آب دانشکده فنی و مهندسی دانشگاه بین المللی امام خمینی (ره) محمدهادی داودی دانشیار بازنشسته پژوهشکده حفاظت خاک و آبخیزداری ابراهیم امیری تکلدانی دانشیار بازنشسته گروه مهندسی آبیاری و آبادانی دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران حسن رحیمی استاد بازنشسته گروه مهندسی آبیاری و آبادانی دانشکده مهندسی و فناوری کشاورزی دانشگاه تهران

because it is not possible to recognize the mechanism of cantilever failure in field studies, this type of common failure in riverbanks is investigated in the laboratory. for this purpose, two samples of susceptible soil that forms an overhanging block in riverbanks are used for physical model tests to determine their physical, chemical and mechanical characteristics. soil blocks of different d...

2017
R. Dave Evans Richard A. Gill Valerie T. Eviner

Soil characteristics and functions are critical determinants of rangeland systems and the ecosystem services that they provide. Rangeland soils are extremely diverse, but an emerging understanding is that paradigms developed in more mesic forest ecosystems may not be applicable. Vascular plants, biological soil crusts, and the soil microbial community are the three major functional groups of or...

Journal: :journal of rangeland science 2013
vahid ebrahimian, reza bagheri mohsen mohseni ahmad poormirzaei

in order to study of ecological and phenological traits of ferulago angulata asan important medicinal plant, this research was conducted in hezar mountains andbondareh henza in kerman province, iran. random samples of this plant were taken andtheir vegetation habitat conditions and their growth characteristics including height ofcollar leaves, height of flower stem, flower stem number and forag...

Soil is one of the most important natural resources covering a large area of the land surface. Soil plays a vital role in biosphere processes, such as energy balance, hydrology, biochemistry, and biological productivity. It supports plants that supply foods, fibers, drugs, and some other human needs. Conversely, desert regions include about one third of earth lands and these regions have increa...

Journal: :آب و خاک 0
مهدی دریائی سید محمود کاشفی پور

abstract due to the importance of using clay soil in many constructive projects such as, road foundation, irrigation canals and related hydraulic structures and etc., improvement of the physical and mechanical soil properties has been the main interest of the geo-technique specialists for years. in this regard different methods such as mixing clay soil with lime or cement have been used. it has...

2015
A. S. Gregory K. Ritz S. P. McGrath J. N. Quinton K. W. T. Goulding R. J. A. Jones J. A. Harris R. Bol P. Wallace E. S. Pilgrim A. P. Whitmore

National governments are becoming increasingly aware of the importance of their soil resources and are shaping strategies accordingly. Implicit in any such strategy is that degradation threats and their potential effect on important soil properties and functions are defined and understood. In this paper, we aimed to review the principal degradation threats on important soil properties in the UK...

احمد جلالیان, , عباس پاشایی, , حسین خادمی, , فرشاد کیانی, ,

To investigate the degree of forest degradation and the effect of land use change on selected soil quality attributes in loess-derived landforms, samples were taken from different land uses including forest, rangeland, degradated rangeland and farmland in Pasang watershed located in the Galikesh area of Golestan province (37°16'N, 55°30'E). The annual average temperature and mean precipitation ...

The decline of trees has been raised as one of the main problems in arid and semi-arid regions. Understanding the type and extent of the relationships among different environmental factors – e.g. soil characteristics as the basis for growth and development of plant species - and natural disturbances can be facilitated the ways of sustainable forest management and a useful tool for monitoring th...

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