نتایج جستجو برای: tree crop

تعداد نتایج: 236631  

2004
Y. Tian R. E. Dickinson L. Zhou M. Shaikh

[1] This paper uses the Community Land Model (CLM2) to investigate the improvements of a new land surface data set, created from multiple high-quality collection 4 Moderate Resolution Imaging Spectroradiometer data of leaf area index (LAI), plant functional type, and vegetation continuous fields, for modeled land surface variables. The previous land surface data in CLM2 underestimate LAI and ov...

2005
Nyree Zerega Diane Ragone Timothy J. Motley

Breadfruit ( Artocarpus altilis (Parkinson) Fosberg, Moraceae) is a staple crop in Oceania, where it was originally domesticated. It is a versatile tree crop with many uses including construction, medicine, animal feed, and insect repellent. However, it is principally grown as a source of carbohydrates and is an important component of agroforestry systems. Unlike many herbaceous starch crops ha...

2013
Ramni Jamnadass Frank Place Emmanuel Torquebiau Eric Malézieux Miyuki Iiyama Gudeta W Sileshi Katja Kehlenbeck Eliot Masters Stepha McMullin John C Weber Ian K Dawson Gudeta Sileshi

Agroforestry supports food and nutritional security through: (1) the direct provision of tree foods such as fruits and leafy vegetables and by supporting staple crop production; (2) by raising farmers’ incomes through the sale of tree products and surplus staples; (3) by providing fuels for cooking; and (4) by supporting various ecosystem services such as pollination that are essential for the ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده برق و کامپیوتر 1393

در سال های اخیر روش هایی برای استفاده بهینه از منابع در شبکه های کامپیوتری به ویژه شبکه ی مراکز داده ابری که به طور عمده مبتنی بر همبندی fat-tree هستند، ارائه شده است. جلوگیری از ازدحام بر روی پیوندهای ارتباطی و استفاده بهینه از مسیرهای موجود یکی از چالش های مهم در این نوع شبکه ها محسوب شده و همواره تحقیقاتی بر روی آن صورت گرفته است که اکثر آن ها مانند ecmp تمرکزی به شرایط موجود در شبکه مثل وضع...

2010
DANIEL C. DEY EMILE S. GARDINER JOHN M. KABRICK JOHN A. STANTURF DOUGLASS F. JACOBS

Establishing trees in agricultural bottomlands is challenging because of intense competition, flooding and herbivory. A summary is presented of new practices and management systems for regenerating trees in former agricultural fields in the eastern USA. Innovations have come from improvements in planting stock and new silvicultural systems that restore ecological function more quickly than trad...

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