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< 【 International Plant Cultivation and Parenting Skill Standard (Elementary)】II.Scientific Soil Testi
18. Determination of Soil Natural Water Content by Drying Method
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19. Determination of Natural Soil Natural Water Content by Alcohol Combustion Method
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20. Determination of Soil Water Holding Capacity
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21. Regulation of Soil Moisture
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22. Determination and Adjustment of Soil Texture
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23. Determination of Soil Bulk Density
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