SPECIES-CLIMATE RELATIONSHIPS OF 10 DESERT PLANT SPECIES AND THEIR ESTIMATED POTENTIAL DISTRIBUTION RANGE IN THE ARID LANDS OF NORTHWESTERN CHINA Taking the way of developing the urbanization for promoting the ecologilization in developing Northwest China Studies on cytology of11 Astragalus species from Northwestern China Management Models for Natural Forests in Northwestern China ECOLOGICAL REGIONALIZATION OF ARID LANDS IN NORTHWESTERN CHINA ANATOMIC STUDIES ON SIX SPECIES OF BUPLEURUM L. QUANTITATIVE STUDY ON SEED FLORA RESEMBLANCE IN NORTHWESTERN CHINA Analysis of the wheat yellow dwarf epidemic and its predicting model of BP neural network in northwestern China The impact of climate warming on crop planting and production in northwestern China Effect of mulching method on soil temperature and grain yield of spring wheat in rainfed agricultural areas of northwestern China