نتایج جستجو برای: cultivated land

تعداد نتایج: 139197  

2015
Wang Kaiyong Zhang Pengyan

Based on the background of construct the national grain strategy project of Henan province core and construct Zhongyuan Economic Zone, considering the Henan province's cultivated land resources use efficiency and food security, using multiple linear regression model and the principal component analysis to analyze the cultivated land resources’ use efficiency between 1999-2008 of Henan province,...

ژورنال: علوم آب و خاک 2011
سمیه شمسی محمودآبادی, , فرهاد خرمالی, ,

In order to study the effects of different land uses on soil development, a loess hillslope was selected in Agh-Su area, eastern Golestan Province. Six profiles in four land uses including pasture, Quercuse natural forest, Cupressus artificial forest and a cultivated land, were dug and studied. Samples from different horizons were collected for physico-chemical and microscopic analyses. Importa...

2017
Wenbo Li Dongyan Wang Qing Wang Shuhan Liu Yuanli Zhu Wenjun Wu

Under rapid urban sprawl in Northeast China, land conversions are not only encroaching on the quantity of cultivated lands, but also posing a great threat to black soil conservation and food security. This study's aim is to explore the spatial relationship between comprehensive cultivated soil heavy metal pollution and peri-urban land use patterns in the black soil region. We applied spatial la...

2012
K. D. Joshi

When agroecology is considered, the hill regions are divided into three (Table 1.1) resulting in five distinct domains that vary in their resource endowment, land-use systems, farming systems, cropping patterns and intensities, and access to road and market networks. Population distribution in Nepal is related more to the proportion of cultivated land than to the geographical area. For example,...

2012
Jun Lv Weifeng Yin

The rapid development of agricultural modernization in Hubei province has an influence on cultivated land resources variations to a certain degree. This paper used grey relational analysis method,combined with Hubei province cultivated land area decreased data within the year covering 2000 to 2010 and agricultural modernization development index data, then analyzed the influence relationship be...

2010
Nancy H. Chau Weiwen Zhang

For decades, rapid urban expansion has led to concerns over the loss of cultivated land in rural China. Less well known is the fact that development of newly cultivated land has in fact consistently exceeded land conversion from 1999-2006. This paper provides an analytical model that makes sense of this observation, featuring fiscal decentralization, local governments as custodians of land use ...

2012
Yanmin Ren Yongxia Yang Yuchun Pan Yu Liu Yunbing Gao Xiumei Tang Zhixuan Zeng

The basic farmland within the protection areas was required to be of high-quality and connective in the general plans for land use. A new method was developed to delineate the boundaries of high-quality, concentrated and connective cultivated land. Based on mathematical morphology principles and GIS methods, the high quality of cultivated land blocks could be identified through dilation and ero...

Journal: :Remote Sensing 2016
Patrick Danielson Limin Yang Suming Jin Collin G. Homer Darrell Napton

We developed a method that analyzes the quality of the cultivated cropland class mapped in the USA National Land Cover Database (NLCD) 2006. The method integrates multiple geospatial datasets and a Multi Index Integrated Change Analysis (MIICA) change detection method that captures spectral changes to identify the spatial distribution and magnitude of potential commission and omission errors fo...

ژورنال: علوم آب و خاک 2013

Study of land use effects on soil quality indicators leads to sustainable management and preventing progressive land degradation. The TM (1987) and ETM+ (2000 and 2005) data were used to study land use change effects in Mahan-Joopar area on soil quality indicators. Fifty random soil samples from 0-30 cm depth of each land use were taken using provided maps. Organic matter, microbial respiration...

2017
Sen Li Tao Wang Changzhen Yan

Policy has long been considered one of the major driving forces for land-use/cover change. However, research on the interactions between land-use/cover change (LUCC) and relevant policies remains limited. The agropastoral ecotone is a typical area of policy implementation and LUCC. Therefore, this study integrates the use of multisource and multiresolution remote sensing and topographic and fie...

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