نتایج جستجو برای: expansion of rain irrigation

تعداد نتایج: 21178589  

Journal: :International Journal of Environment and Waste Management 2012

2017
Xiaowei Liu S. Kent Hoekman

Background: To mitigate climate impacts associated with energy consumption, renewable fuel policies have been established in the USA that encourage production and use of corn ethanol. Current fuel usage of corn ethanol is approximately 15 billion gallons/year (57 billion liters/year), with nearly all of this in the form of E10 (10% blend in gasoline). There is now interest in increasing fuel et...

Journal: :مرتع و آبخیزداری 0
رمضان طهماسبی عضو هیأت علمی مؤسسه آموزش عالی علمی ـ کاربردی جهادکشاورزی ، ایران فرود شریفی عضو هیأت علمی مرکز تحقیقات حفاظت خاک و آبخیزداری ، ایران فریدون کاوه استاد گروه آبیاری دانشگاه آزاد اسلامی ـ واحد علوم و تحقیقات ، ایران ابوالقاسم توسلی استاد پژوهشی مرکز تحقیقات حفاظت خاک و آبخیزداری ، ایران

one of the major sectors of water loss is the loss of rain runoff. kirkby (2001) the effect of soil surface characteristics in the production of runoff in time and space scales concluded that soil properties such as undulating, soil texture and structure on the amount and spatial pattern of runoff are effective. in this research that was conducted in the latian watershed, twenty experimental pl...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
اعظم رضایی دانشجو/دانشگاه تربیت مدرس سید ابوالقاسم مرتضوی استاد/دانشگاه تربیت مدرس غلامرضا پیکانی استاد/دانشگاه تهران

the agriculture sector is the largest water consumer in arid and semi-arid areas. so water scarcity has an important effect on this section. drought as one of the most important factors in making crisis in zayanderud river basin (zrb) has a deep effect on the agriculture sector. this study evaluates the drought effects on irrigation land and farmers profit on the east of zrb by using spi and cb...

2016
Alexander Garden

we are again in want of satisfactory reliable data. None exist that I know of. But if it is so, surely fever should be prevalent at all seasons when the heat is sufficient to generate the poison. Irrigation is used chiefly, I believe, to supplement the natural rain-fall, so that if it acts in this way as a cause, it ought to do so more in seasons of deficient rains than in other years, for then...

Journal: :آب و خاک 0

the main purpose of rainfed farming is increasing the water productivity by applying suitable agricultural management including single irrigation (si) and panting time for wheat varieties. in order to study the si optimization and determination its optimal program, a field experiment was conducted as split-split plot based on a randomized complete block design with three replications for differ...

2015
Satoru SHIMIZU Takahiro MOCHIZUKI Shigeyuki OSAWA Toshihiro KUMABE

After the drainage of chronic subdural hematomas (CSDHs), residual isolated deep-seated hematomas (IDHs) may recur. We introduce intraoperative ultrasonography to detect and remove such IDHs. Intraoperative ultrasonography is performed with fine transducers introduced via burr holes. Images obtained before dural opening show the CSDHs, hyper- and/or hypoechoic content, and mono- or multilayers....

2004
Jérôme Chopard

This work presents a three dimensional model simulating water transfers in soil and root systems (figures will be 2D for a better readability). Simulations are usually performed using a layer discretisation of soil space ([12]) often monodimensional or a global fluxes budget ([15]). Some experimental models simulate individual roots ([2]) but are huge consumers of computer ressources. Our appro...

Water scarcity is an important obstacle to the development and expansion of urban landscape in the arid and semi-arid regions of the world. Nowadays organic and artificial materials can be used to reducing water consumption without reducing the quality and quantity of urban landscape. In order to study of the effect of some mulch type on the reduce of irrigation interval on a popular seasonal p...

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