D.C. R.M. Aiken and G.S. McMaster. 1997. Optimum wheat stubble height to reduce erosion and evaporation . Bowman, R.A. 1997. Field methods to estimate soil organic matter . Anderson, R.L. 1997.
Cultural systems can reduce reporductive potential of winter annual grasses.
H.R. Duke and L.R. Ahuja. Corn growth and nitrogen uptake with furrow irrigation and fertilizer bands. Nielsen, D.C. 1997. On-farm soil water measurements . Bowman, R.A. and A.D. Halvorson.