1.
changes of main agriculture region in Chinese history
中国历史时期主要农业区的变迁
2.
Farming-Grazing Vicissitude and Man-Land Relation Evolution of Ejin Banner in Historical Period;
额济纳地区历史时期的农牧业变迁与人地关系演进
3.
changes of deserts in chinese history
中国历史时期沙漠的变迁
4.
changes of coast line in Chinese history
中国历史时期海岸线的变迁
5.
changes of Eastern Plain water system in Chinese history
中国历史时期东部平原的水系变迁
6.
Discussion of Agro-exploitation and Eco-environment Variance in South of Hunan Province in Past Time;
论历史时期的湘南农业开发与生态环境变迁
7.
Historical Change of Agricultural Structure in Tujia Minority Areas;
历史时期土家族地区农业结构的演变
8.
changes and distribution of sericulture, cotton cultivation and textile industry in Chinese history
中国历史时期蚕桑、植棉业和纺织业的分布和变迁
9.
Historical Period NT Natural Disasters and Agricultural Production Structure Change Research;
历史时期西北地区自然灾害与农业生产结构变迁研究
10.
The Exploitation of the Main Wild Animals and Their Changes in History in Sichuan Liangshan Mountain Areas;
历史时期四川凉山地区主要野生动物资源开发利用及其变迁
11.
Historical Change and Reflections on China's Agricultural Financial Policy
中国农业政策性金融的历史变迁与思考
12.
The Research of Farmland Main Agriculture Character Historical Vicissitude for HanNan of WuHan Base on GIS;
基于GIS的武汉市汉南区耕地主要农化性状的历史变迁研究
13.
The Study on Changes of Oasis Agriculture in South of Xinjiang during the Period of the Republic;
民国时期新疆南疆地区的绿洲农业变迁研究
14.
The Regional Pattern of the Chinese Peoples Development and Historical Transition;
中国人类发展的地区格局与历史变迁
15.
distribution and migration of population in Chinese history
中国历史时期人口的分布和迁徙
16.
An Research of Africultural Vicissitude and Countrymen Stratification of North China during the Republic of China;
民国时期华北农业的变迁与农民分化
17.
Forest Changes of Liangshan Moutain Areas in Sichuan Province in History;
历史时期四川凉山地区森林植被的变迁
18.
Research of the Relationship between Climatic Changes and Wars in Chinese History;
历史时期气候变迁与中国战争关系研究