نتایج جستجو برای: size land

تعداد نتایج: 667756  

Journal: :کشاورزی (منتشر نمی شود) 0
غلام حسین عبداله زاده دانشجوی دکتری توسعه کشاورزی، دانشکده اقتصاد و توسعه دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏ خلیل ‏کلانتری دانشیار دانشکده اقتصاد و توسعه کشاورزی، دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏

in order to analyse the effective factors contributing to land fragmentation, required data ‎were collected by questionnaire from 151 farmers who were selected through a stratified random ‎sampling design from 12 villages of ramjerd yek subdistrict of marvdasht country. factor analysis ‎was used to identity explanatory factors of land fragmentation. the variables of natural-farming, ‎socio-cult...

ژورنال: علوم آب و خاک 2014
شکل آبادی, محسن , محبوبی, علی اکبر , محمودزاده, حمید ,

Organic carbon pools and carbon lability directly affect soil biological, physical and chemical characteristics. Besides, capacity of self-organization of soil is related to the organic carbon pools. Sand size fraction (> 50 µm) organic matter is more labile than silt+clay size fraction organic matter. Assessment of this organic carbon variation can be a suitable index to determine soil quality...

Journal: :Journal of Economic Geography 2019

Journal: :تحقیقات آب و خاک ایران 0
مریم اوسط کارشناس ارشد، دانشکده مهندسی و فناوری کشاورزی احمد حیدری استادیار، دانشکده مهندسی و فناوری کشاورزی فریدون سرمدیان دانشیار، دانشکده مهندسی و فناوری کشاورزی

balance among different fractions of a carbon sources is of paramount importance in maintenance of very important in soil quality and environmental health. on the other hand, rapid growth of world population, degradation of agricultural soils, along with release of greenhouse gasses are some of the main challenges of the 21st century. the aim of this study was to investigate the extent of chang...

Although previous studies have attempted to address the challenge of land subdivision, there is still a scarcity in the literature on how the extent of conformity to land subdivision planning regulations may be statistically and spatially analyzed. This study, therefore, explores the extent to which residential developers comply with land subdivision planning regulations in Kenya, a case study ...

Journal: :تحقیقات مهندسی کشاورزی 0
مهران موحدی کارشناس ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران شاهین رفیعی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران حسین مبلی دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران مرتضی شهیدزاده عضو هیئت مدیره بانک کشاورزی علی جعفری استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران

this study investigated the effects of land size and two leased and private farming systems of machinery on economic efficiency and factors such as total production cost per hectare (ratio of total cost of agricultural inputs and operations to farm size), total income (ratio of product and byproduct value to farm size), yield (ratio of crop production to farm size) and degree of mechanization f...

Journal: :Journal of theoretical biology 1986
J E Hokkanen

The upper mass limit to terrestrial animals is studied using physical arguments and allometric laws for bone and muscle strength and animal locomotion. The limit is suggested to lie between 10(5) and 10(6) kg. A possibility for a still higher mass, in case of new adaptations, is not excluded.

امیرنژاد, حمید, رفیعی, حامد,

Land and its size are important as the most basic factors of production in agriculture .Fragmentation is one of the main problems that rice producers of Mazandaran province are confronted with. Non-efficiency in farm management, inability in effective using of agriculture technology and machinery, and low range productivity of production are all related to land fragmentation. In order to overco...

Journal: :Remote Sensing 2017
Mingde You Anthony M. Filippi Inci Güneralp Burak Güneralp

Accurate characterization of the direction of land change is a neglected aspect of land dynamics. Knowledge on direction of historical land change can be useful information when understanding relative influence of different land-change drivers is of interest. In this study, we present a novel perspective on land-change analysis by focusing on directionality of change. To this end, we employed M...

ژورنال: علوم آب و خاک 2009
امیرنژاد, حمید, رفیعی, حامد,

Land and its size are important as the most basic factors of production in agriculture .Fragmentation is one of the main problems that rice producers of Mazandaran province are confronted with. Non-efficiency in farm management, inability in effective using of agriculture technology and machinery, and low range productivity of production are all related to land fragmentation. In order to overco...

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