humid climate with more rainfall in the mountains than in the river valley. The average annual temperature is 8-9 degrees centigrade, ideal for both pasturing and farming. Between the plain and the mountains are scattered barren desert, grassland, meadow, bush and forest areas. In winter, the herdsmen usually tend their cattle on the plain and in the desert; in spring they move to the mountain slopes; in summer, they go higher to the alpine meadows;and in autumn,they return to the lowlands.