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41	month in review the mix. Clay has the finest particle size of the three loam components. These fine clay particles compact easily, especially under the weight of heavy construction equipment, Add to Reading List Source URL: www.gardenillinois.com Language: English - Date: 2008-04-03 20:15:29 Landscape architecture Organic gardening Organic farming Sustainable gardening Composting Hardpan Compost Tile drainage Mulch Agriculture Soil Land management
42	Chapter 7 Table 29. Composition of phosphogypsum * Agricultural Uses of Add to Reading List Source URL: www.ars.usda.gov Language: English - Date: 2001-07-30 10:06:17 Soil chemistry Soil Sulfates Calcium compounds Land management Phosphogypsum Gypsum Hardpan Alkali soils Chemistry Soil science Matter
43	The Effect of Lime And Organic Matter on the Development of Alfalfa Roots Add to Reading List Source URL: digital.library.okstate.edu Language: English - Date: 2009-01-09 16:55:16 Soil Alfalfa Hardpan Root Manure San Joaquin Agriculture Pedology Land management
44	Roadside Manual (M 25-30) Add to Reading List Source URL: www.wsdot.wa.gov Language: English - Date: 2012-08-10 14:08:50 Topsoil Fertility Revegetation Earthworm Soil biodiversity Index of soil-related articles Soil Landscape architecture Hardpan
45	Soil Quality Information Sheet Soil Quality Indicators: Infiltration Add to Reading List Source URL: urbanext.illinois.edu Language: English - Date: 2013-12-05 17:00:54 Land management Hydrology Agronomy Infiltration Erosion No-till farming Tillage Surface runoff Hardpan Soil science Soil Earth