نتایج جستجو برای: 5 01 ha circular sample plots

تعداد نتایج: 1741443  

2013
Sylvie Gourlet-Fleury Frédéric Mortier Adeline Fayolle Fidèle Baya Dakis Ouédraogo Fabrice Bénédet Nicolas Picard

Large areas of African moist forests are being logged in the context of supposedly sustainable management plans. It remains however controversial whether harvesting a few trees per hectare can be maintained in the long term while preserving other forest services as well. We used a unique 24 year silvicultural experiment, encompassing 10 4 ha plots established in the Central African Republic, to...

Journal: :Journal of nematology 1979
A W Johnson D R Sumner C A Jaworski

Three crops of cucumber were grown in succession in beds by use of trickle irrigation, plastic film mulch, and soil chemical treatments over a 17-month period, including a fallow winter season. Total yield for the three crops was highest (1208 quintals/ha) in film-mulched plots treated with MBR-CP, and next-highest in film-mulched plots treated with DD-MENCS (1094 quintals/ha); total yield was ...

2005
Julieta Benitez-Malvido Miguel Martinez-Ramos

Edge creation has a pronounced influence on the understory vegetation, but the effects of edges on seedling species recruitment are still poorly understood. In Central Arnazonia, 9-1 9 years after fragmentation, we recorded species richness and net seedling recruitment rate in 1 ha blocks exposed to none, one, or multiple edges within forest fragments. One-hectare blocks were located in the cen...

Journal: :جنگل و فرآورده های چوب 0
احمد علیجانپور دانشیار/ دانشگاه ارومیه سالار تارم دانشگاه ارومیه جواد اسحاقی راد دانشگاه اومیه

crataegus as a woody multipurpose species based on fruit production is very important for local residents in the northern zagros forests located at the south of west azerbaijan province. this study aimed at determining the quantitative characteristics, soil and physiographic properties in the crataegus spp. stands. in current study, eight crataegus habitats were selected and 3-5 0.1 ha circular...

Maziar Haidari, Nabiollah Yarali Naghi Shabanian

For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree Diameter at Breath Height in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran ...

Maziar Haidari Nabiollah Yarali Naghi Shabanian

For maintaining of Zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. To detection of suitable sampling method to study tree Diameter at Breath Height in the northern Zagros forest, Blake forest, in Baneeh region, Kurdistan province, and west of Iran ...

2014
Benjamin O. Knapp Joan L. Walker G. Geoff Wang Huifeng Hu Robert N. Addington

The desirable structure of longleaf pine forests, which generally includes a relatively open canopy of pines, very few woody stems in the mid-story, and a well-developed, herbaceous ground layer, provides critical habitat for flora and fauna and contributes to ecosystem function. Current efforts to restore longleaf pine to upland sites dominated by second-growth loblolly pine require informatio...

ژورنال: علوم آب و خاک 2010
افیونی, مجید , اسماعیلی ساری, عباس , کریم‌پور, مریم ,

Sewage sludge application on farmland as fertilizer is commonly practiced in many countries. However, high concentration of heavy metals like mercury (Hg) in sludge can cause pollution of soil, plant and the human food chain. In order to examine the risk of Hg transfer into plants a five year field experiment was conducted in which we investigated uptake of Hg from a sludge-amended soil by corn...

2015
F. Lombardi M. Marchetti P. Merlini G. Chirici R. Tognetti S. Burrascano A. Alivernini N. Puletti

There is increasing awareness that structure-based indicators should be considered for assessing the biological value of late successional forests. In order to increase the unique habitat features critical for old-growth associated species, it is important to identify and rank candidate potential forest sites on the basis of their distinctive structural features. Data on living and deadwood com...

2007
MUHAMMAD MAQSOOD AZAM ALI

Finger millet landraces viz., TZA-01 and TZM-01 were grown in glasshouses under two moisture regimes (fully irrigated and after drought) to investigate the effects of environmental stress on the growth, SPAD measurement, radiation use efficiency and yield of finger millet (Eleucine coracana). The drought treatment was imposed at 28 DAS beyond which no irrigation was applied to the droughted tre...

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