  SURFACE ROUGHNESS AND CROP CONSTANTS FOLLOW
 NUMBER OF CROPS AND SURFACES =  4
    1 CROP:    corn PIT: 1.0 PER: 45 RC:0.47 HU:   53. N:0.099 C:0.28
    2 CROP: pasture PIT: 0.5 PER: 93 RC:0.50 HU:   38. N:0.115 C:0.08
    3 CROP: alfalfa PIT: 0.6 PER: 96 RC:0.53 HU:   35. N:0.150 C:0.04
    4 CROP:farmstea PIT: 0.3 PER: 70 RC:0.30 HU:   20. N:0.045 C:0.01
