نتایج جستجو برای: laser land levelling

تعداد نتایج: 302014  

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
زینب شکوهی دانش آموخته کارشناسی ارشد اقتصاد کشاورزی دانشگاه شیراز محمد بخشوده استاد اقتصاد کشاورزی دانشگاه شیراز

determinants of the adoption of land leveling in fars province were investigated through an application of logit model to data collected from a sample of 300 farmers. the results revealed that area under cultivation, farmers' education, earnings beside-farm-income, access to credits, availability of laser applied land leveling instruments and equipments in the region, as well as dam water,...

Journal: :Netherlands Journal of Agricultural Science 1963

Journal: :Review of education, administration and law 2022

Based on the survey data, study has made yield and profitability comparisons in contexts of modern agricultural production technologies adopted by cotton growers district Bahawalpur. The extent adoption was gauged through constructing a farming index (MFI). points scored regarding MFI, were classified into five categories. By applying independent samples t-test, means between adopters non-adopt...

Journal: :Sustainability 2021

The new technologies of surface irrigation require the adoption effective Laser-controlled precision land levelling (PLL) to reach high performance standards, with significant benefits on water saving, salinity control, crop productivity, and farmer’s income. This study aimed assess impacts PLL systems, focusing maize districts Hetao (China) Lower-Mondego (Portugal). experimental at field scale...

Journal: :Journal of the Faculty of Agriculture, Kyushu University 2010

2004
Kirsi Karila Mika Karjalainen Juha Hyyppä

The centre of the Turku city by the river of Aurajoki in Finland has been built on clay and silt soil. The level of the ground water has been constantly lowering during the last few centuries due to the postglacial land uplift and extensive water usage leaving the old wooden pilework exposed to decaying. The decaying has led to the subsidence of some historical buildings in the old centre of Tu...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
مریم السادات تاجر دانشگاه تربیت مدرس، ترویج و آموزش کشاورزی غلامرضا پزشکی راد دانشگاه تربیت مدرس، ترویج و آموزش کشاورزی کورش رضایی مقدم دانشکده کشاورزی دانشگاه شیراز، ترویج و آموزش کشاورزی

many new technologies have been employed to improve welfare conditions and to provide an optimum utilization of the existing resources in agriculture sector. laser leveling technology is one of the most progressed in maintenance of soil and water resources which itself has an important role in sustainable development. the purpose of this study was to realize the specifications of adopters vs. n...

Journal: :فیزیک زمین و فضا 0
رامین کیامهر مهدی اسحاق

the best quadratic unbiased estimation (bque) of variance components in the gauss-helmert model is used to combine adjustment of gps/levelling and geoid to determine the individual variance components for each of the three height types. through the research, different reasons for achievement of the negative variance components were discussed and a new modified version of the best quadratic unbi...

Journal: :تحقیقات مهندسی کشاورزی 0
سیدمجتبی شفاعی دانش آموخته کارشناسی ارشد امین اله معصومی استادیار گروه مکانیک ماشین های کشاورزی دانشکده کشاورزی دانشگاه صنعتی اصفهان جعفر قیصری دانشیار گروه مهندسی کنترل دانشکده برق و کامپیوتر دانشگاه صنعتی اصفهان

excessive cutting depth during leveling of agricultural land increases power needed by the tractor drawbar and will result in undesirable slippage and excessive strain on the tractor engine.  the result of sustained excess will be the break-down of the tractor. an auxiliary blade depth controller to prevent overloading during leveling was designed, fabricated and evaluated in this study. the sy...

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