نتایج جستجو برای: soil crust resistance increases the combination mulch of cement 400 gr
تعداد نتایج: 22878824 فیلتر نتایج به سال:
Mulching is used to improve the condition of agricultural soils by covering the soil with different materials, mainly black polyethylene (PE). However, problems derived from its use are how to remove it from the field and, in the case of it remaining in the soil, the possible effects on it. One possible solution is to use biodegradable plastic (BD) or paper (PP), as mulch, which could present a...
Improving water use efficiency and soil properties are two major factors for sustainable development in desert areas. Therefore, this research aims to study the effectiveness of a biological hydrogel, plant vegetation layer, sand and barley straw with rain harvesting techniques through micro-catchment operation on some soil properties including pH, Nitrogen, Electrical conductivity, Sodium Abso...
عنوان:بازتاب دفاع مقدس در شعر سه بانوی شاعر(طاهره صفارزاده، سپیده کاشانی، سیمین دخت وحیدی) نام ونام خانوادگی:شیرین علیپور پیروزیان رشته تحصیلی:زبان وادبیات فارسی نام استاد راهنما :دکتر مهین پناهی نام استاد مشاور : دکتر مهدی نیک منش زمان دفاع:14/ 7/1388 چکیده موضوع این پژوهش چگونگی بازتاب دفاع مقدس در اشعار سه بانوی شاعر " طاهره صفّارزاده" ، "سپیده کاشانی" و" سیمین دخت وحیدی " است ....
چکیده معضل چاقی به عنوان عارضه ای جدی برای زندگی بی تحرک و ماشینی، مورد توجه اغلب مراکز بهداشتی و درمانی دنیا قرار گرفته است. چاقی عامل زمینه ساز و در واقع عامل خطری برای بروز بیماری های قلبی - عروقی است که عموماً با کاهش طول عمر مورد انتظار و افزایش بیماری همراه است. هدف پژوهش حاضر تأثیر 12 هفته تمرینات ویبریشن کل بدن، تمرینات هوازی و تمرینات ترکیبی( هوازی و ویبریشن کل بدن) بر ترکیب بدنی زنان ...
agricultural sustainability is closely related with the efficient use of natural resources, which are primarily transformed by the action of microorganisms. soil microorganisms are usually used as early indicators of soil quality since they rapidly respond to changes in soil management. a field experiment was carried out aiming to evaluate the effect of siratro (macroptylium atropurpureum), bah...
straw intercepted drop impact energy or surface applied powdered phospho-gypsum reduced aggregate disperSeedling emergence is the crucial first step in crop establishment; sion the infiltration rate decreased more gradually, rehowever, crops frequently must penetrate or lift a thin, dense, soil quiring approximately 45 min to reach 10 mm h 1, comlayer called a crust, which is formed by drop imp...
heavy metals, e.g. cd and pb emit and release into the environment during cement production and are deposited into soils. this research was carried out to determine the concentration and spatial distribution of trace elements in top soils around the kurdistan cement factory, west of iran in order to evaluate the effect of cement factory on the environment. twenty-four soil samples were collecte...
There is a continual drive to conserve water and improve irrigation efficiency in agriculture, especially in regions where water resources are limited and regulated. Mulching is one cultural practice which can be used to reduce water needs. Using certain agricultural byproducts as mulch is a sustainable practice which can provide other benefits as well such as improving soil. Wheat straw, grass...
Nowadays, mulch types are used to improve environmental conditions for plant growth in terms of irrigation water and soil quality. Production and cultivation of forage plants in arable lands, especially in arid and semi-arid regions, is very important, because it reduces grazing pressure on rangelands. In order to evaluate the effect of mulch types on some plant characteristics of forage maize ...
A model of unsaturated soil-water movement using a prediction model of basic physical soil properties for calculating correlation functions was developed using VADOSE/W. The reliability of the model was assessed by comparing the results with those of a soil-column test. Coefficients of determination, R2, between the simulated and the measured daily evaporation for sand-mulch thicknesses of 0 (c...
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