Soil Total Carbon and Nitrogen Content

Cropping System
Year Top Depth (cm)
Total Nitrogen (%) Total Carbon (%)
Conv. Corn/Tomato

1993

0
0.105
0.980

15
0.097
0.862

1997

0
0.109
0.987

15
0.098
0.874
Conv. Wheat/Tomato

1993

0
0.113
0.975

15
0.105
0.866

1997

0
0.114
0.942

15
0.107
0.861
Irrigated Wheat Control

1993

0
0.111
0.992

15
0.103
0.903

1997

0
0.109
0.951

15
0.098
0.839
Irrigated Wheat/Fallow

1993

0
0.100
0.886

15
0.088
0.750

1997

0
0.099
0.869

15
0.086
0.721
Irrigated Wheat/Legume

1993

0
0.110
0.906

15
0.098
0.775
Legume/Corn/Tomato

1993

0
0.111
0.983

15
0.103
0.889

1997

0
0.113
0.848

15
0.101
0.870
Organic Corn/Tomato

1993

0
0.115
1.034

15
0.104
0.928

1995

0
0.133
1.128

15
0.107
0.930

1997

0
0.146
1.256

15
0.119
1.031
Rainfed Wheat Control

1993

0
0.109
0.977

15
0.099
0.869

1995

0
0.110
0.973

15
0.103
0.906

1997

0
0.110
0.978

15
0.101
0.875
Rainfed Wheat/Fallow

1993

0
0.109
0.979

15
0.101
0.894

1997

0
0.107
0.960

15
0.099
0.860
Rainfed Wheat/Legume

1993

0
0.108
0.936

15
0.100
0.855

1995

0
0.101
0.910

15
0.092
0.790

1997

0
0.109
0.961

15
0.097
0.810
Transitional

1993

0
0.111
0.808

15
0.102
0.857

1997

0
0.110
0.950

15
0.107
0.876