The response process to extreme climate events of the household compound system in the northern slope of Tianshan Mountain Regional differences in soil nutrient content along the forest edge in the northern slope of Tianshan Mountains Distribution characteristics of soil heavy metal content in northern slope of Tianshan Mountains and its source explanation Analysis on Seedling Functional Traits of 7 Wild Fruit Tree Species on the Northern Slope of Tianshan Mountains Soil properties at the tree limits of Picea schrenkiana forests in response to varying environmental conditions on the northern slope of Tianshan mountains Surface pollen research of Nanshan region, Shihezi City in Xinjiang