Comprehensive Evaluation on Drought Resistance of Early Fruiting Walnut Cultivars Comparison of drought resistance among three Calligonum in the Southern Fringe of the Taklamakan Desert Relationship between root system characteristics and drought resistance of wheat populations in semiarid region Selection of drought resistant materials and drought resistant index for maize in South China Differences Responses of Ornamental Crabapple Cultivars to Soil Drought Stress Comprehensive evaluation of drought resistance of Reaumuria soongorica from four geographical populations ANATOMICAL STUDIES ON THE DROUGHT RESISTANT VARIETIES IN MAIZE Comprehensive Evaluation on Drought Resistance of Early Fruiting Walnut Cultivars