Effect of ecological engineering construction at county scale on agricultural landscape in the black soil region of Northeast China;

Spatial evaluation on ecological and aesthetic quality of Beijing agricultural landscape

On the base of planning theories,functions of landscape ecology and the basic principles of ecologic agricultural landscape planning,it analyzes the characteristics of ecological agriculture in Longquanyi District and puts forward some opinions about the planning of agricultural landscape there.

The formation reasons of agriculture landscape in the historical old towns were analyzed and the agriculture landscape value in the historical old towns was illustrated.

It is very important to research driving factors and ecological effects of agriculture landscape pattern change.

The authors analyse the effects on agriculture landscape in the ecotone by water and soil loss in a case study carried out in Yongsheng, Lijiang, Yunnan Province.

Based on the differences of the geographical condition, the paper divides the studied area into nine agricultural landscape-belts.

Towards the end of 1930s, the Agricultural Adjustment Act (1938), taking the ide a of ever normal granary from China as its core, helped to lay a solid foundatio n for the finish of twenty year s depression of American agriculture and keeping it abundant till now.