According to the needs of erecting eco-environment, exploitting and utilizing soil and water resources, authors had systemly surveyed several near to ground factors, such as sunlight, air and soil temperature, soil moisture, the distribution and stain of plant productivity which mainly consisted of grasses, by using several auto-count instruments in several sloping fields and in different site of the sloping fields. The authors also analyised and announced some of these basic variety law which could provide...
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