1、the world loss of cropland
2、Most of the villagers survive off tiny plots of cropland.
3、This is only a part of his cropland.
4、PIK succeeded in idling about 25 percent of American cropland.
5、The area of cropland has a declining trend.
6、Environmental quality suitability evaluation of heavy metal polluted cropland soils
7、The soil nutrient condition with different layers changed slightly under Conversion from cropland into Forest, but cropland changed significantly.
8、Temporal and spatial distribution of cropland-population-grain system and pressure index on cropland in Jinghe watershed;
9、Cropland classification is a category of land evaluation, its task is to figure out the quality, quantity and spatial distribution of cropland in some regions.
10、As research of conversion of cropland to forestland develops, many researchers have concerned the follow-up problem of conversion of cropland to forestland.
11、The research estimates the cropland production potentiality by step correct method.
12、A Study of population stress simulation in slope cropland de-farming based on grid;
13、house sites and private plots of cropland and hilly land are also owned by collectives.
14、In Mali, the practice of growing trees amid rows of cropland seemed to be everywhere.
15、The discussion of calculation method based on multi-object oriented cropland ridge coefficient
16、Many gains in cropland are associated with irrigation, but there are also swaths of improvement in rain-fed cropland and pastures in the prairies and plains of North America and western India.
17、The study is an earlier stage job for integrated land-use planning and cropland held-replenish balance in Henan province.
18、Research on the processes of wind erosion of cropland, desertification of grassland, reactivation of fixed dunes and shifting...
19、Spatio-temporal variations in the starting dates of growing season in China's cropland over the past 20 years
20、Distribution of heavy metals in cropland soils amended with sewage sludge and in the uptake by soybean
21、The Conservation Technology Information Center says forty percent of American cropland used this method at last report.
22、Performing the research of this aspect has very important theoretical and practical meaning to carry into conversion of cropland to forest engineering and improve environment.
23、Based on fractal theory, time sequence of inundated area of cropland due to flood disaster from 1950 to 1997 are studied.
24、A simplified integrative algorithm of radiance correction to wide view spectral imaging data and the special object of cropland based on the principle of statistics was presented.
25、The results indicate that flood disaster systems have fractal characteristics, average time-scale of forecasting inundated area of cropland is 8~9 year.
26、By using GIS technology, this paper studied the patch dynamics of cropland and grassland in Zhangye oasis, Gansu Province in 1985-2006.
27、In addition to property damage, the floods have affected some of the nation's most fertile cropland, and are expected to have an impact on already rising food prices, especially for crops like corn.
28、Often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions and pumping it to nearby cropland.
29、 At that time, there was no Haifeishi, Jinsong District was still a cropland. In summer, dragonflies could be caught in paddy fields. Armed police officers and soldiers raised pigs and sheep around.
30、Working people who are members of rural economic collectives have the right, within the limits prescribed by law, to farm private plots of cropland and hilly land, engage in household sideline production and raise privately owned livestock.
