Through the monitoring network for cultivated land quality in county area, distribution and changing trend of the quality should be reflected. Besides, the quality of non-sampled locations should also be estimated with the data of sampling points. Due to the correlation among spatial samples, traditional methods such as simple random sampling, stratified sampling and systematic sampling are ine...

A system for evaluating land suitability using fuzzy logic method has been developed. The system determining a degree of delimitation, land ratings, suitability classes, and their actual land suitability subclasses of given land characteristics. The main parts of the evaluation process, which included in the fuzzy inference engine of the knowledge based system, are fuzzification and defuzzifica...

As an important reserve cultivated land resource in my country, its development and utilization are of great significance to ensure food security. Aiming at the problems bare gravel leakage shallow soil layer barren rock beach area, through community simulation experiments, different covering structures were set up on basis underlying gravel, effects physical chemical properties crop yield moni...

A study was conducted to determine suitable soil properties as soil quality indicators, using factor analysis in order to evaluate the effects of land use change on loessial hillslope soils of the Shastkola District in Golestan Province, northern Iran. To this end, forty surface soil (0-30 cm) samples were collected from four adjacent sites with the following land uses systems: (1) natural fore...

2 The map on the title page shows the crop production value of China's cultivated land in Yuan per hectare (Reproduced from: Heilig, 1999). The map shows that there are great divergences in crop productivity between cultivated areas in China. Very " profitable " crop production is possible in the provinces of Hubei, Hunan and parts of Jiangsu. A very poor crop production value is generated in t...

The rapid urbanization and economic growth experienced by China in recent years has led to the expansion of construction land. This resulted substantial transformation cultivated land However, efficiency occupation land, its regional differences, urban-rural disparity remain unclear. Therefore, using population use data, we measured occupied urban rural during 1990–2020 proposing absolute, diff...