نتایج جستجو برای: cultivated land size

تعداد نتایج: 687875  

2016
Xiaobing Wang Futoshi Yamauchi Keijiro Otsuka Jikun Huang

This paper aims to examine the dynamics of land transactions, machine investments, and the demand for machine services using farm panel data from China. Recently, China's agriculture has experienced a large expansion of machine rentals and machine services provided by specialized agents, which has contributed to mechanization of agricultural production. On the other hand, the empirical results ...

2017
Lin Lin Ziran Ye Muye Gan Amir Reza Shahtahmassebi Melanie Weston Jinsong Deng Shenggao Lu

Cultivated land in China has faced severe challenges in recent years due to rapid urbanization. In 1997, the “cultivated land requisition-compensation balance” policy was implemented by the government to maintain the quantity and quality of cultivated land. Previous studies mainly focused on the quantity changes of cultivated land. In this study, from a quality perspective, we characterized the...

2008
Yingui Cao Chun Yuan Wei Zhou Jing Wang

Three Gorges Project is the great project in the world, which accelerates economic development in the reservoir area of Three Gorges Project. In the process of development in the reservoir area of Three Gorges Project, cultivated land has become the important resources, a lot of cultivated land has been occupied and become the constructing land. In the same time, a lot of cultivated land has be...

Journal: :Remote Sensing 2014
Juanle Wang Yujie Zhou Lijun Zhu Mengxu Gao Yifan Li

Cultivated land resources are an important basis of regional sustainability; thus, it is important to determine the distribution of the cultivated land in the Northeast Asia trans-boundary area of China, Russia and Mongolia, which has a continuous geographic and ecological environment and an uneven population distribution. Extracting information about the cultivated land and determining the spa...

2015
Linlin Xiao Xiaohuan Yang Hongyan Cai Marc A. Rosen

With rapid and continuous population growth and the associated declining quality of cultivated land, food security in China has been attracting the attention of scholars both domestically and internationally. In recent decades, the implications of the cultivated land balance policy have promoted spatial changes of cultivated land. Estimating the agricultural potential productivity and assessing...

2010
Ling Wang Xin Lv Hailong Liu

This paper, with No.22 State Farm, Agricultural Division No.2, XPCC as the example and under support of GIS, takes cultivated land plot as the evaluation unit and chooses 13 influence factors from five aspects of nutrient of cultivation layer, physical and chemical properties of cultivation layer, soil management, climate conditions and obstacle factor to establish desert oasis cultivated land ...

2010
James M. Dyer

Question: Are contemporary herb and tree patterns explained by historic land use practices? If so, are observed vegetation patterns associated with lifehistory characteristics, soil properties, or other environmental variables? Location: Southeastern Ohio, USA. Methods: Using archival records, currently forested sites were identified with distinct land use histories: cultivated, pasture (but no...

2016
Xuewen Li Weiwen Zhang Yi Peng

Although it is difficult, many countries are attempting to balance economic development and cultivated land preservation for various reasons. China’s experience is a good illustration of such challenges during rapid economic development and urbanization. The central government of China emphasized the high self-sufficiency ratio of grain and therefore set a bottom-line for the area of cultivated...

2011
Juan Feng

Title of Document: A BALANCING ACT? —AN EMPRICIAL EXAMINATION OF WHETHER THE DYNAMIC BALANCE POLICY HAS HELPED CHINA RECUDE CULTIVATED LAND LOSS AMID RAPID URBAN LAND EXPANSION Juan Feng Doctor of Philosophy 2011 Directed By: Professor Erik Lichtenberg Agricultural and Resource Economics Associate Professor Chengri Ding Urban Studies and Planning For decades, the Chinese government has been con...

2008
Shen Tao Li Chengming

This Paper uses MODIS data to monitor and evaluate cultivated land changes in Yangtze River Delta region. Firstly, In order to validate the veracity of the classification results by MODIS, Hangzhou city is selected as the experimental area, Spot5 and Landsat scenes in 2001 and 2005 are collected and used to conduct initial validation exercises to assess the quality of land use classification re...

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