DISTRIBUTION OF ORGANIC MATTER CONTENTS OF TOBACCO-GROWING SOIL AND ITS INFLUENCING FACTORS IN XIANGXI Selection of Optimum Technological Conditions for Vinegar-Processing of Fresh Rhizoma Corydalis Evaluation on climatic feasibility of tobacco-growing areas in Hubei and its similarity to that of foreign tobacco-growing areas The agricultural eco-environment of vegetable growing areas in Fuzhou City Analysis of ecological factors and quality of flue-cured tobacco leaves in Tongshan tobacco-growing areas Analysis of the physical and chemical characteristics of Fujian tobacco-growing soils EVALUATION OF ECOLOGICAL FACTORS AND FLUE-CURED TOBACCO QUALITY IN TOBACCO-GROWING AREAS IN SOUTHERN HUNAN, CHINA Comparison of Analgesic Effect between Locally Vinegar-Processed Preparation of Fresh Rhizoma Corydalis and Traditionally Vinegar-Processed Rhizoma Corydalis Quantitative Evaluation on Regional Suitability of Medicinal and Ornamental Dichroa febrifuga Lour. The contents of exchangeable calcium and magnesium in Hunan tobacco-growing soils and their effects on tobacco quality