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the grand plan
the organic gardening movement
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acid activities added aerated agricultural alkaline amount anaerobic areas bacteria balance basic benefits carbon dioxide cattle chemical fertilizers chemical gardening commercial fertilizers components compost heap crops cultivation decomposing processes deficient earth earthworm effect ensure erosion farmers farming fertile soil fresh manure fungi gardening organically Grand Plan green matter greensand healthy humus Indore insecticides insects Justus von Liebig land large quantities law of return limestone livestock living maintain materials method of gardening methods of composting microorganisms mulch nature nature's necessary nitrogen no-digging method nutritive organic gardening organic matter organic methods oxygen percent phosphorus pile plant and animal plant growth plenty of organic plowed potash potassium practice process of decomposition production pulverized raw organic release responsible result rich in organic rock root systems sawdust sheet composting shredding Sir Albert Howard Sir Howard soil fertility soil's supply take place throughout topsoil trace elements usually vegetables