Earthlearningidea http: www.earthlearningidea.com Make your own soil Investigating the type and origin of the ingredients of soil Mix together some gravel, sand, powdered clay, dry compost (to represent humus*) and dec - Organic base - Document - PDFSEARCH.IO

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	Earthlearningidea http://www.earthlearningidea.com Make your own soil Investigating the type and origin of the ingredients of soil Mix together some gravel, sand, powdered clay, dry compost (to represent humus*) and dec Add to Reading List Document Date: 2014-11-17 03:12:24 Open Document File Size: 106,77 KB Share Result on Facebook City Waldorf / / / IndustryTerm physical and chemical processes / online discussion / / Organization ESTA Primary Committee / Earth Science Teachers’ Association / / Person Elizabeth Devon / Elizabeth Devon Introduce / / Position teacher / great scientist / / URL http / SocialTag Soil science Land use Organic gardening Humus Alkali soils World Reference Base for Soil Resources Soil pH Agriculture Soil Land management

Earthlearningidea http://www.earthlearningidea.com Make your own soil Investigating the type and origin of the ingredients of soil Mix together some gravel, sand, powdered clay, dry compost (to represent humus*) and decAdd to Reading List