கேள்வி: உழவு - நூல்தொகை பற்றி நீங்கள் என்ன அறிந்துள்ளீர்கள்?
பதில்: * Cook, R.L., H.F. McColly, L.S. Robertson, and C.M. Hansen. 1958. Save Money – Water – Soil with Minimum Tillage. Extension Bulletin 352. Cooperative Extension Service, Michigan State University, East Lansing. * Sprague, Milton A., and Glover B. Triplett. 1986. ''No-tillage and surface-tillage agriculture: the tillage revolution''. New York, Wiley. * Troeh, Frederick R., J. Arthur Hobbs, Roy L. Donahue. 1991. ''Soil and water conservation for productivity and environmental protection'', 2nd ed. Englewood Cliffs, N.J., Prentice-Hall. * Soil Science of America. 2009. Glossary of Soil Science Terms. [Online]. Available at https://www.soils.org/publications/soils-glossary (28 September 2009; verified 28 September 2009). Soil Science of America, Madison, WI. * [http://www.sciencebuddies.org/science-fair-projects/project_ideas/EnvSci_p052.shtml No-Plow Farmers Save Our Soil] * [http://knowledge.allianz.com/en/globalissues/safety_health/food_water/agriculture_sustainable_farming.html agriculture_sustainable_farming.html] * [http://www.dailymail.co.uk/news/article-1145431/Now-farm-help-teach-world-live-oil-says-woman-banished-plastic-bags-town.html I will teach the world farming without oil] * [http://www.umequip.com/tillage/primary/zone-builder Manufacturer of Agricultural Zone Till Subsoiler with Photos] (umequip.com by Unverferth Equipment)
கேள்வி: உழவு - மேலும் படிக்க குறித்து விரிவாக சொல்லுங்கள்.
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