نتایج جستجو برای: but also prevent soil and water pollutions

تعداد نتایج: 17064207  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

Journal: :Applied Soil Ecology 2022

Soil pore size and arrangement control the heterogeneous distribution of nutrients, water, air and, therefore, are likely a superimposed integrated factor dictating soil microbial community structure. It is known that with more large pores can potentially harbor diverse microbes under low hydraulic connectivity. Still, there scant information on how (PSD) governs composition association communi...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

efl/esl textbooks have been regarded as essential language teaching materials with which the learners spend about 70 up to 90 percent of their class time. the important role they play and their vast use make them not only influential in learning the language but also in shaping values and attitudes. put it another way, textbooks socialize learners using their contents (i.e. texts, illustrations...

Journal: :تحقیقات مهندسی کشاورزی 0
منصور پاره کار استادیار مؤسسه تحقیقات فنی و مهندسی کشاورزی علی نشاط دانشجوی دوره دکتری آبیاری، واحد علوم و تحقیقات دانشگاه آزاد اسلامی، تهران فریدون کاوه دانشیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات

evaporation from the soil surface has an important role in the water balance model in nature, so that the major part of rain fall and irrigation water in arid and semi-arid regions is lost via evaporation from the soil surface. in such areas, there are some regions with high water table and because of evaporation from the soil surface, salts accumulation also occur in the soil surface. so evapo...

Journal: :Horticultura Brasileira 2021

ABSTRACT Vegetable cultivation requires high water use and weed control. Soil cover using recycled paper, can be an alternative to polyethylene film reduce incidence, soil temperature increase efficiency beyond reduces costs environmental pollutions. The objective of this study was evaluate the biodegradable mulch in management (WUE) lettuce crop. treatments were composed brown paper (RP), blac...

2013
Wen-Yih Sun Kate Jr-Shiuan Yang Neng-Huei Lin

Aerosol particles affect atmospheric radiation and cloud microphysics, and are considered a major uncertainty in climate forcing. At the same time, accurate simulation and prediction of meteorological conditions are necessary to simulate the distribution and chemical reaction of the aerosols. Distribution of pollutions can also be used to validate meteorological models. This paper consists of t...

Journal: :Anthropology of food 2012

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده ادبیات و علوم انسانی 1392

in new management approaches, in the organizations with inflexible structure, existing of red tapes and interruptions caused by limitations and also non-compliance with environmental changes, create demotivation among staff. with regard to the influence of job motivational potential and its relationship to the type of organizational structure( enabling and dissuasive), the goal of this research...

The consequence of human activities caused destructive and irreversible problems to the original state in the few past decades that has attracted the attention of all walks of life. The sinkholes are one of the mentioned effects in different parts of the planet such as Iran, Hamadan and especially have been happened in Kaboudarahang-Famenin plain. Researchers believe that the most important con...

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