Study on Plantation of Grass Outer Fringe on Sandy Coast Shelter-forest in Guangdong Province The compensatory growth of shrubby Pinus thunbergii response to the boring stress in sandy coast Optimum fertilization for high sugar and low-nitrate pumpkin production in the Loess Plateau Branching pattern characteristics and anti-windbreakage ability of Pinus thunbergii in sandy coast Fractal feature of soil structure and reflection on soil properties in different regeneration patterns of Casuarina equisetifolia forest in coastal sandy soil A Study of the Psammophilous Vegetation along the Coast of Jiangsu Province STUDIES ON THE PROTECTIVE MATURITY PERIOD AND REGENERATION AGE OF PINUS THUNBERGII PROTECTION FOREST ON SANDY COAST,SHANDONG PROVINCE