Influences of Soil-loosening on the Olive Resistance Physiology and Soil Environmental Factors under Drought Stress Travelling Wave Mechanism and Dynamic Mechanical Characteristics of Band Saw Blade Vibration Dynamic Tensile Force Measure and Analysis of Woodworking Band Saw Blades ISSR Analysis of Hybrids of Loose Spike Sorghum and Sudangrass The Comprehensive Set of Techniques for the Improvement Deteriorated Rangeland in the Semiarid Regions of Inner Mongolia, Jilin and Shaanxi Province Research Progress in the Control and Regulation of Plant Growth and Development by Reactive Oxygen Species STUDY ON SOIL HUMUS AND FERTILITY CHARACTERISTIC IN THE 29 YEAR-OLD PLANTATIONS OF CHINESE FIR ON DIFFERENT ROTATIONS THE EFFECT ON THE CONTROLLED BURNING TO THE SoIL HUMUS AND FERTILITY IN DIFFERENT FOREST STANDS A New Loose-curd Cauliflower Hybrid‘Zhe 017’ A New Loose-curd Cauliflower Hybrid‘Zhe 017’ Comparison on accumulation of flavonoids in loose and compact callus suspension cell culture of Tetrastigma hemsleyanum Comparison on accumulation of flavonoids in loose and compact callus suspension cell culture of Tetrastigma hemsleyanum