نتایج جستجو برای: dryland cold area

تعداد نتایج: 685576  

The rehabilitation of sandy desertified land in various dryland ecosystems by different management practices has a great potential to increase aggregate stability and improve soil quality. However, plants in general may have a different ability to sustain soil. The objective was to determine the effects of reclamation practices including Haloxylon ammodendron and Atriplex canescens plantation o...

Journal: :Land 2023

Exploring the landscape ecological security pattern and its driving mechanisms in key economic zones is of great significance for preventing resolving risks promoting regional sustainable development. This study quantitatively analyzed land use change characteristics Huaihe River Eco-economic Belt from 1980 to 2020 using transfer matrix intensity index. Further, evolution their were investigate...

Journal: :زراعت دیم ایران 0
صادق شهبازی دورباش موسسه تحقیقات کشاورزی دیم کشور خشنود علیزاده دیزج موسسه تحقیقات کشاورزی دیم کشور وحید فتحی رضائی موسسه تحقیقات کشاورزی دیم کشور

the dragon's head(lallemantia iberica f. & c. m.) can be introduced as a new oilseed crop to cold rainfed areas because of its unique characteristics. the field trial was carried in a split-plot factorial in a randomized complete block design (rcbd) with three replications in dryland agricultural research institute (dari) in 2010-11. the treatments included three landraces of dragon’s head...

2017
J. Allen Williams Lynn K. White David R. Johnson

2009
Yu-Hsin Cheng Chung-Ru Ho Zhewen Zheng Yung-Hsiang Lee Nan-Jung Kuo

Multi-sensor data from different satellites are used to identify an upwelling area in the sea off northeast Taiwan. Sea surface temperature (SST) data derived from infrared and microwave, as well as sea surface height anomaly (SSHA) data derived from satellite altimeters are used for this study. An integration filtering algorithm based on SST data is developed for detecting the cold patch induc...

امام, یحیی , تدین, محمودرضا,

  Photosynthesis and wheat grain yield responses to supplemental irrigation with different amount of applied water under dryland conditions were investigated. Therefore, a two-year field experiment was conducted research farm of College of Agriculture, Shiraz University during 2004-2005. Five levels of irrigation including dryland conditions, irrigation at stem elongation, booting, flowering an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی مکانیک 1381

در این پایان نامه در ابتدا دلایل شکل گیری آلاینده ها در شرایط cold start و warm up و راهکارهای کاهش آنها ارائه می شود. در ادامه، بهینه سازی فرایند شکل گیری مخلوط هوا و سوخت از طریق کنترل دقیق نسبت هوا به سوخت بعنوان یکی از بهترین راهکارهای عملی کاهش آلاینده ها در شرایط cold start و warm up با جزئیات کامل مورد بررسی قرار می گیرد. مدل بدست آمده (برای موتور پیکان انژکتور)، شبیه سازی می شود و نتایج...

Journal: :Water 2022

Habitat quality is the key to regional ecological restoration and green development, land use change an essential factor affecting habitat quality. Studying spatial temporal evolution characteristics of under multiple scenarios significant for management, preventing future environmental risks. We used improved Logistic-CA-Markov (Logistic-Cellular Automata-Markov) InVEST (Integrated Valuation E...

2010
Sujith Ravi David D. Breshears Travis E. Huxman Paolo D'Odorico

a r t i c l e i n f o Land degradation in drylands is one of the major environmental issues of the 21st century particularly due to its impact on world food security and environmental quality. Climate change, shifts in vegetation composition, accelerated soil erosion processes, and disturbances have rendered these landscapes susceptible to rapid degradation that has important feedbacks on regio...

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