1. Brady NC, Weil RC (2012) The Nature and Properties of Soils. (14th edn), Dorling Kindersley India Pvt. Ltd, Noida, India.
2. Day SD, Bassuk NL (1994) A review of the effects of soil compaction and amelioration treatments on landscape trees. Journal of Arboriculture20(1): 9-17.
3. Stine MA, Weil RR (2002) The relationship between soil quality and crop productivity across three tillage systems in south central Honduras. American Journal of Alternative Agriculture17(1): 2-8.
4. Onduru DD, Jager AD, Wouters B, Muchena FN, Gachimbi L, et al. (2006) Improving Soil Fertility and Farm Productivity under Intensive Crop-Dairy Smallholdings: Experiences from Farmer Field Schools in the Highlands of Kiambu District, Central Kenya. Middle-East Journal of Scientific Research1(1): 31-49.
5. Digging deeper to find unique microbial communities: The strong effect of depth on the structure of bacterial and archaeal communities in soil;Eilers;Soil Biology and Biochemistry50,2012