3.2.3 to collect soil samples. Store samples in soil (soil surface) on the 0-15 cm depths of 200 samples (a sample study space, 100) by split sample collection based on the proportion of land area covered in two types of planting area and lawn and keep the 2 examples: 1) not interfere with the structure (undisturbed sample) with a bore of soil samples collected (soil core) to be analyzed for total density of the soil, and 2) the interference structure (disturbed sample) to analyze the properties of soil and soil organic carbon in quantity calculation.
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