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close this bookBetter Farming Series 04 - The Soil: How the Soil is Made up (FAO - INADES, 1976, 37 p.)
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View the documentWhy we study the soil
Open this folder and view contentsDifferent kinds of land
Open this folder and view contentsWhat is soil made of ?
View the documentAir in the soil
Open this folder and view contentsWater in the soil
Open this folder and view contentsLiving creatures in the soil
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