نتایج جستجو برای: area of land under rice cultivation

تعداد نتایج: 21268950  

H, Yahaya Luka Gougong Ezra

The research analyzed the land tenure system among rice farmers in Awe Local Government Area of Nasarawa State, Nigeria. Two hundred and forty (240) farmers were sampled by a multi stage sampling procedure and used as respondents for the study. Well-structured questionnaires were used for data collection. The main means of data analysis were percentages and correlation. Findings revealed that 4...

Journal: :Soil Science and Plant Nutrition 1974

احمدپور, امیر, مؤمنی هلالی, هادی, پورسعید, علیرضا,

In general, the ultimate goal of a sustainable system is to maximize the benefits of existing resources and to minimize the threats to the environment that occur due to the present conventional agricultural activities. Meanwhile, seed, as a rice cultivar in the present study, is presented as an important factor in sustainability. Therefore, identifying the most suitable cultivar of rice for sus...

2015
Yuhua Wang Ji Yeon Hong

What fundamentally causes the various levels of per capita income across regions within the same country that share similar political institutions? We present a “rice hypothesis”: that the mix of crops grown in different regions explains the variation in economic development. Using sub-national data from China, we demonstrate that rice cultivating regions are significantly wealthier than wheat ...

2002
Steve Frolking Jianjun Qiu Stephen Boles Xiangming Xiao Jiyuan Liu Yahui Zhuang Changsheng Li Xiaoguang Qin

[1] Large-scale assessments of the potential for food production and its impact on biogeochemical cycling require the best possible information on the distribution of cropland. This information can come from ground-based agricultural census data sets and/ or spaceborne remote sensing products, both with strengths and weaknesses. Official cropland statistics for China contain much information on...

2016
Steven J. Deverel Timothy Ingrum David Leighton

Subsidence of organic soils in the Sacramento-San Joaquin Delta threatens sustainability of the California (USA) water supply system and agriculture. Land-surface elevation data were collected to assess present-day subsidence rates and evaluate rice as a land use for subsidence mitigation. To depict Delta-wide present-day rates of subsidence, the previously developed SUBCALC model was refined a...

Journal: :ماشین های کشاورزی 0
محمد شریفی اسداله اکرم شاهین رفیعی مجید سبزه پرور

alborz province with an area of about 5121.7 km2 has about 0.31% of the total area of the country. the total arable area of the province is about 48954 hectares. water, land and capital are the most important factors for agricultural production. by understanding the subjective beliefs, decision-making criteria and economic incentives of local farmers, the priority of crops can be achieved with ...

2015
Qihua Liu Xiu Wu Jiaqing Ma Bocong Chen Caiyun Xin

A delay in the mechanical transplantation (MT) of rice seedlings frequently occurs in Huanghuai wheat-rice rotation cropping districts of China, due to the late harvest of wheat, the poor weather conditions and the insufficiency of transplanters, missing the optimum transplanting time and causing seedlings to age. To identify how delaying transplanting rice affects the agronomic characteristics...

2015
Abbas Amini

Planning for the optimal use of productive resources in agricultural systems leads to the conservation in addition to the promotion of farmers’ socio-economical conditions. Being certain or precise in any decision making in agricultural planning is impossible. Fuzzy mathematical programming techniques, developed in recent decades, are the most appropriate and applicable approaches to include th...

2011
A. A. Mustafa Man Singh Nayan Ahmed Manoj Khanna A. Sarangi A. K. Mishra

Land evaluation procedure given by FAO for soil site suitability for various land utilization types has been used to assess the land suitability for different crops and for generating cropping pattern for kharif (summer) and rabi (winter) seasons in Kheragarah tehsil of Agra. Kheragarah tehsil suffers from many types of land degradation such as such as salinity, watelogging, ravines, degraded h...

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