1. Kitab al-Filaha;Aboul-Khayr,1946
2. Soil Erosion in Iceland;Arnaulds,2001
3. Nitrous oxide emissions following application of residues and fertilizer under zero and conventional tillage;Baggs;Plant Soil,2003
4. Bennett, H.H., 1939. Soil Conservation. Ayer Co. Pub. Description from biblio.com. McGraw-Hill Book Company, New York, 1939 (1st Hard Cover, 1st ed., 2nd printing, 993 pp. CR-LS. Catalogs: Science).
5. Influente of no-tillage on soil moisture;Blevins;Agron. J.,1971