Applied and Environmental Soil Science / 2013 / Article / Tab 5 / Research Article
Effect of Continuous Agriculture of Grassland Soils of the Argentine Rolling Pampa on Soil Organic Carbon and Nitrogen Table 5 Soil organic carbon and nitrogen contents (mg g−1 ) and bulk density (Mg m−3 ) of the different soil depths and A horizon clay content (mg g−1 ) at 2500 Mg soil ha−1 used in all the sites analyzed.
Symbol Soil type Agriculture time Depth Bulk density Carbon Nitrogen Clay Requirement years cm Mg m−3
g Kg−1 2500 Mg ha−1 T period Pe Typic Argiudoll 0 14 14 7 1.07 1.1 1.25 30.1 23.2 20.2 2.9 2.2 2.0 25.2 Pass Cr Typic Argiudoll 0 30 7 1.19 1.26 26.2 16.0 2.5 1.4 26.3 Pass Ur Typic Argiudoll 0 28 8 1.07 1.25 30.5 19.8 2.8 1.6 24.6 Pass Ro Typic Argiudoll 2 13 12 8 1.1 1.18 1.27 24.9 23.7 14.6 2.2 1.9 1.2 23.9 Pass Py Vertic Argiudoll 5 16 10 7 1.07 1.22 1.25 24.3 18.1 10.6 2.1 1.6 0.9 24.1 Pass Ro5 Typic Argiudoll 8 22 1.17 23 1.9 0.0 23.9 Pass LG Aeric Argialboll 34 11 11 3 1.18 1.18 1.22 20 21.1 18.2 1.7 1.9 1.5 23.3 Pass Ro Typic Argiudoll 35 15 10 8 1.1 1.22 1.3 19.1 18.9 11.8 1.6 1.6 1.0 21.4 Pass Pe6 o Py2x Typic Argiudoll 40 18 4 1.19 1.31 15.2 12.9 1.2 1.0 19.0 Fail Ve2 Typic Argiudoll 55 15 8 1.22 1.24 15.1 13.8 1.3 1.2 23.0 Fail LG Aeric Argialboll 60 16 5 8 1.23 1.28 1.3 19.1 19.4 11.2 1.4 1.8 0.8 24.7 Pass AD2 Typic Argiudoll 64 20 1.25 18 1.4 22.1 Pass AD2 Typic Argiudoll 70 16 5 7 1.23 1.41 1.35 16.1 15.9 14 1.3 1.1 1.1 21.2 Pass Ur Typic Argiudoll 72 12 6 5 1.15 1.36 1.38 18.7 18.5 16.7 1.4 1.5 1.2 20.8 Pass Ar2 Typic Argiudoll 72 20 1.25 15.2 1.1 19.7 Fail Cr1 Typic Argiudoll 75 16 8 1.19 1.3 19.4 17.3 1.5 1.4 24.1 Fail Pe Typic Argiudoll 80 16 5 7 1.25 1.32 1.28 19 18.4 18.5 1.5 1.4 1.5 21.5 Pass Ro4 Typic Argiudoll 80 15 1.25 18.9 1.5 19.7 Fail AD2 Typic Argiudoll 83 20 5 1.26 1.35 19.7 20.7 1.4 1.9 23.5 Pass Py Vertic Argiudoll 84 15 8 7 1.22 1.38 1.28 19.4 18.6 18.2 1.6 1.5 1.4 22.0 Pass Py1 ó Py2x Vertic Argiudoll 87 15 5 1.28 1.29 19.8 20.5 1.5 1.9 21.6 Fail Py2x Vertic Argiudoll 112 13 1.22 16.3 1.2 21.2 Fail Ca1 Vertic Argiudoll 113 20 6 1.24 1.3 12.7 12.2 1.0 0.9 23.2 Fail NT period Pe Typic Argiudoll 0 10 10 1.2 1.34 20 16.4 1.9 1.6 Pass Pe Typic Argiudoll 0 10 10 1.22 1.35 16.8 15.7 1.5 1.4 Pass Pe Typic Argiudoll 0 10 10 1.22 1.34 17.1 16 1.7 1.6 Pass Pe Typic Argiudoll 17 5 5 10 1.16 1.3 1.33 17.2 14.3 14.0 1.4 1.2 1.0 22.6 Pass Pe Typic Argiudoll 17 5 5 10 1.14 1.27 1.33 21.1 16.2 14.9 1.9 1.4 1.2 22.7 Pass Pe Typic Argiudoll 21 5 5 10 1.16 1.33 1.34 17.6 14.2 13.8 1.5 1.3 1.3 Pass Pe Typic Argiudoll 21 5 5 10 1.27 1.39 1.38 19.8 14.9 14.0 2.0 1.6 1.5 Pass Pe Typic Argiudoll 25 5 5 10 1.20 1.39 1.38 23.6 16.5 14.9 1.6 1.4 2.3 22.4 Pass Pe Typic Argiudoll 25 5 5 10 1.15 1.33 1.36 19.1 14.1 13.4 Pass Pe Typic Argiudoll 25 5 5 10 1.19 1.31 1.38 21.1 15.2 14.2 Pass Pe Typic Argiudoll 29 5 5 10 1.16 1.32 1.37 22.1 16.3 15.2 2.2 1.6 1.4 Pass Pe Typic Argiudoll 33 5 5 10 1.02 1.33 1.36 21.6 15.9 14.9 Pass
T: tillage; NT: no tillage.
