Dig it! The Secrets of Soil. Beginner
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NACD/FAO ;
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These DIG IT! education materials were developed by NACD based on an exhibition developed by the Smithsonian’s National Museum of Natural History and sponsored by the Soil Science Society of America and the Nutrients for Life Foundation. This version of Dig it! was adapted by the Food and Agriculture Organization of the United Nations in the context of the International Year of Soils 2015.