STUDY ON THE RELATIONSHIP BETWEEN OLIVE ROOT SYSTEM AND SOIL PHYSICAL FACTORS Effects of consecutive overturning of green manure on soil physical and biological characteristics in tobacco-planting fields Effect of Moisture Content,Degree of Bale Compactness, and Urea Preservation on Baled Alfalfa Hay Quality Study on the compactness assessment model of urban spatial form The Simple Estimation of the Breeding Value of Fruit Parents for Hybridization