نتایج جستجو برای: farmland features
تعداد نتایج: 526998 فیلتر نتایج به سال:
More than 124 governmental entities concerned about suburban sprawl and farmland loss have implemented farmland preservation programs preserving 1.67 million acres at a cost of $3.723 billion. Yet little analysis on these programs’ effectiveness in slowing farmland loss has been conducted. Using a unique 50-year 269 county panel data set on preservation programs and farmland loss for six Mid-At...
Farmland preservation is a national issue in modern China. Most studies have focused on farmland preservation policies in the agricultural, commercial and financial industries but have devoted relatively little attention to land use planning. Land use planning is crucial for farmland preservation. This paper selected Dachang County, a typical rural county bordering Beijing, as the study area an...
Information on reproductive performance and body condition in white-tailed deer (Odocoileus virginianus) was obtained in 1981-83 for the glaciated farmland and unglaciated hill country regions of Ohio. Uterine analysis of 275 farmland does and 129 hill country does showed that farmland fawns had a higher reproductive rate (0.85 fetus/doe) than did hill country fawn does (0.62 fetus/doe). Fetuse...
Causal or conditional probability networks (CPNs) are shown to provide a natural framework for combining a time sequence of classified satellite images with other maps for environmental monitoring. The key features of CPNs are described by way of application to an example involving the monitoring of salinisation of farmland over time using satellite images and an ancillary data set derived from...
Land use planning is always officially implemented as an effective tool to control urban development and protect farmland. However, its impact on land use change remains untested in China. Using a case study of Hang-Jia-Hu region, the main objective of this paper was to investigate the influence of different land use spatial control schemes on farmland conversion and urban development. Comparis...
Given the uncertain future living of peasant households when they rent out farmland, the situation of livelihood assets is important for keeping sustainable livelihood. In this paper, the livelihood assets indicators were selected based on DFID’s sustainable livelihoods framework, and Monte Carlo method was adopted to establish the assessment model. The empirical study of peasant households sur...
Land is a kind of basic resources and of great importance to the survival and development of human beings. Due to the conflict between the limited amount of land and the unlimited development of human beings, land surely plays a significant role in national security and social development. The academic circle has introduced the social stability price to the pricing system of farmland, which ref...
Farmland values in the states of the Tenth Federal Reserve District rose about 5.5 percent over the year ended June 30, 1997 (McDaniel and Lamb). Indeed, over the past two years prices in many parts of the country have risen sharply. The jump in farmland values comes at a time of dynamic change in the farm sector. Last year, the federal government enacted sweeping farm legislation that both low...
Characteristics of Soil Environment Variation in Oasis-Desert Ecotone in the Process of Oasis Growth
Cele Oasis on the southern edge of Tarim Basin was used to investigate the impact of human activity on the soil environment of the oasis–desert ecotone during the oasis expansion process. Since farmland is extending into the oasis–desert ecotone during oasis expansion, reclaimed farmland and control plots within the ecotone were investigated. The variations in soil moisture, soil nutrients and ...
America's experience with farmland preservation is a combination of modest success and inconsistent farm policies. The successes--in terms of farmland acres preserved--have been concentrated in a relatively small number of counties, mainly in the Northeast and in California (see Sokolow and Zurbrugg, 2003). But nationwide there is a split between the farm income-oriented policies of the US fede...
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