Agriculture Reference
In-Depth Information
Kitchen, N.R., K.A. Sudduth, and S.T. Drummond. 1999. Soil electrical conductivity as a crop
productivity measure for claypan soils. J Prod Agric 12(4):607-617.
Kitchen, N.R., S.T. Drummond, E.D. Lund, K.A. Sudduth, and G.W. Buchleiter. 2003. Soil
electrical conductivity and topography related to yield for three contrasting soil-crop
systems. Agron J 95:483-495.
Korsching, P., P. Lasley, and T. Gruber. 2005. Iowa Farm and Rural Life Poll 2005 Summary
Report. Department of Sociology, Iowa State University, Ames, IA.
Kort, J. and R. Turnock. 1999. Carbon reservoir and biomass in Canadian prairie shelterbelts.
Agroforest Syst 44:175-186.
Krzic, M., M. Fortin, and A.A. Bomke. 2000. Short-term responses of soil physical properties
to corn planting-tillage systems in a humid maritime climate. Soil Till Res 54:171-178.
Kumhalova, J., F. Kumhala, M. Kroulik, and S. Matejkova. 2011. The impact of topography on
soil properties and yield and the effects of weather conditions. Prec Agric 12:813-830.
Kunkel, K.E., K. Andsager, and D.R. Easterling. 1999. Long-term trends in extreme events
over the conterminous United States and Canada. J Clim 12:2515-2527.
Lal, R. 1993. Tillage effects on soil degradation, soil resilience, soil quality, and sustainability.
Soil Till Res 27:1-8.
Lal, R. 1997. Degradation and resilience of soils. Philos Trans R Soc (Biology) London
352:997-1010.
Lal, R., T.M. Sobecki, T. Iivari, and J.M. Kimble. 2004. Soil Degradation in the United States:
Extent, Severity, and Trends . Lewis Publishers, Boca Raton, FL.
Larney, F.J., H.H. Janzen, B.M. Olson, and A.F. Olson. 2009. Erosion-productivity-soil
amendment relationships for wheat over 16 years. Soil Till Res 103:73-83.
Lasley, P. 1984. Iowa Farm and Rural Life Poll 1984 Summary Report . Department of
Sociology, Iowa State University, Ames, IA.
Lasley, P. 1986 . Iowa Farm and Rural Life Poll 1986 Summary Report . Department of
Sociology, Iowa State University, Ames, IA.
Lasley, P. 1987. Iowa Farm and Rural Life Poll 1987 Summary Report . Department of
Sociology, Iowa State University, Ames, IA.
Lasley, P. 1993. Iowa Farm and Rural Life Poll 1993 Summary Report . Department of
Sociology, Iowa State University, Ames, IA.
Lasley, P. 1998. Iowa Farm and Rural Life Poll 1998 Summary Report . Department of
Sociology, Iowa State University, Ames, IA.
Loveland, P. and J. Webb. 2003. Is there a critical level of organic matter in the agricultural
soils of temperate regions? a review. Soil Till Res 70:1-18.
Lucey, K.J. and D.A. Goolsby. 1993. Effects of climatic variations over 11 years on nitrate-
nitrogen concentrations in the Raccoon River, Iowa. J Environ Qual 22:38-46.
Lynne, G.D., J.S. Shonkwiler, and L.R. Rola. 1988. Attitudes and farmer conservation behav-
ior. Am J Agric Econ 70(1):12-19.
Machado, S., E.D. Bynum, Jr., T.L. Archer, R.J. Lascano, L.T. Wilson, J. Bordovsky,
E.  Segarra, K. Bronson, D.M. Nesmith, and W. Xu. 2000. Spatial and temporal vari-
ability of corn grain yield: site-specific relationships of biotic and abiotic factors. Prec
Agric 2:359-376.
Mahboubi, A.A. and R. Lal. 1998. Long-term tillage effects on changes in structural properties
of two soils in central Ohio. Soil Till Res 45:107-118.
Martens, D.A., W. Emmerich, J.E.T. McLain, and T.N. Johnsen. 2005. Atmospheric carbon mitiga-
tion potential of agricultural management in the southwestern USA. Soil Till Res 83:95-119.
Mason, J.W., G.D. Wegner, G.I. Quinn, and E.L. Lange. 1990. Nutrient loss via groundwater
discharge from small watersheds in western and south-central Wisconsin. J Soil Water
Conserv 45:327-331.
Massey, R.E., D.B. Myers, N.R. Kitchen, and K.A. Sudduth. 2008. Profitability maps as an
input for site-specific management decision making. Agron J 100:52-59.
Search WWH ::




Custom Search