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Browse on keywords: organic matter yield
Search results on 05/19/13
2349. Hae, F.K.. 1981. Climate's impact on food supplies: Can it be identified?. L.E. Slater and S.K. Levin (eds.). Climate's impact on food supplies. p. 9.
2617. Hill, K.W.. 1954. Wheat yields and soil fertility on the Canadian prairies after a half century of farming.. Soil Sci. Soc. Am. Proc. 18:182-184.
T: soil properties X rotation; wheat yields X time
3471. Kaiser, V.G.. 1962. A lesson in farming from an old agriculture.. V. Kaiser papers, box 1, folder 80.
Describes wheat fallow fields in Turkey and Iran farmed over 3000 years; low yields (6-7 bu/ac), no inputs, no erosion - stable system; intensified production can cause massive problems and requires better soil conservation and organic matter management.
4229. McCurdy, C.W.. 1894. Idaho soils.. ID Agr. Expt. Sta. Bull. #9.
Palouse soils around Moscow, ID producing 30-60 bu/ac wheat; early soil test for soil organic matter %: pasture (virgin soil) = 6.87, subsoil = 9.55, cultivated = 13.95 and 13.65; method not known, results seem high.