نتایج جستجو برای: center pivot

تعداد نتایج: 286528  

Journal: :Journal of Agricultural and Applied Economics 1982

Journal: :مدیریت آب و آبیاری 0
حبیب صیادی دانشجوی دکتری آبیاری و زهکشی، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز، ایران امیر حسین ناظمی استاد، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز، ایران علی اشرف صدرالدینی دانشیار، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز، ایران رضا دلیرحسن نیا استادیار، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه تبریز، تبریز، ایران

the variety of sprinkler devices available for the center pivot and linear irrigation systems has been increased dramatically in recent years. in the current study, via conducting some indoor experiments, one type of fixed pad spray sprinkler (d3000) and two types of moving pad spray sprinklers (r3000 and s3000) with various configurations (working pressure, nozzle size and type of deflector pa...

Journal: :Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association 2011
Asheesh Bedi Volker Musahl Volker Steuber Daniel Kendoff Dan Choi Answorth A Allen Andrew D Pearle David W Altchek

PURPOSE The purpose of this study was to objectively evaluate the anatomic and biomechanical outcomes of anterior cruciate ligament (ACL) reconstruction with transtibial versus anteromedial portal drilling of the femoral tunnel. METHODS Ten human cadaveric knees (5 matched pairs) without ligament injury or pre-existing arthritis underwent ACL reconstruction by either a transtibial or anterome...

2005
P. B. Luz D. Heermann

There have been several proposals to evaluate potential runoff in center pivot irrigation, through the integration of time varying infiltration–precipitation rate curves, involving complex iterative procedures. Some methods use empirical infiltration functions, such as the Kostiakov equation. Others use physically based infiltration functions, such as the Green–Ampt equation. Another option is ...

2017
Jian Jiao Yadong Wang Liliang Han Derong Su

Sprinkler selection influences the water distribution uniformity of center pivot irrigation systems. The sprinkling uniformity of the center pivot is crucial for the yield and quality of crops on a large scale. Rotating and fixed spray plate sprinklers (RSPSs and FSPSs) are the two most popular types. However, sprinkler selection is mainly based on price, not on differences in performance betwe...

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