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.

SymbolSoil typeAgriculture timeDepthBulk densityCarbonNitrogenClayRequirement
yearscmMg m−3 g Kg−12500 Mg ha−1

T period
PeTypic Argiudoll0141471.071.11.2530.123.220.22.92.22.025.2Pass
CrTypic Argiudoll03071.191.2626.216.02.51.426.3Pass
UrTypic Argiudoll02881.071.2530.519.82.81.624.6Pass
RoTypic Argiudoll2131281.11.181.2724.923.714.62.21.91.223.9Pass
PyVertic Argiudoll5161071.071.221.2524.318.110.62.11.60.924.1Pass
Ro5Typic Argiudoll8221.17231.90.023.9Pass
LGAeric Argialboll34111131.181.181.222021.118.21.71.91.523.3Pass
RoTypic Argiudoll35151081.11.221.319.118.911.81.61.61.021.4Pass
Pe6 o Py2xTypic Argiudoll401841.191.3115.212.91.21.019.0Fail
Ve2Typic Argiudoll551581.221.2415.113.81.31.223.0Fail
LGAeric Argialboll6016581.231.281.319.119.411.21.41.80.824.7Pass
AD2Typic Argiudoll64201.25181.422.1Pass
AD2Typic Argiudoll7016571.231.411.3516.115.9141.31.11.121.2Pass
UrTypic Argiudoll7212651.151.361.3818.718.516.71.41.51.220.8Pass
Ar2Typic Argiudoll72201.2515.21.119.7Fail
Cr1Typic Argiudoll751681.191.319.417.31.51.424.1Fail
PeTypic Argiudoll8016571.251.321.281918.418.51.51.41.521.5Pass
Ro4Typic Argiudoll80151.2518.91.519.7Fail
AD2Typic Argiudoll832051.261.3519.720.71.41.923.5Pass
PyVertic Argiudoll8415871.221.381.2819.418.618.21.61.51.422.0Pass
Py1 ó Py2xVertic Argiudoll871551.281.2919.820.51.51.921.6Fail
Py2xVertic Argiudoll112131.2216.31.221.2Fail
Ca1Vertic Argiudoll1132061.241.312.712.21.00.923.2Fail

NT period
PeTypic Argiudoll010101.21.342016.41.91.6Pass
PeTypic Argiudoll010101.221.3516.815.71.51.4Pass
PeTypic Argiudoll010101.221.3417.1161.71.6Pass
PeTypic Argiudoll1755101.161.31.3317.214.314.01.41.21.022.6Pass
PeTypic Argiudoll1755101.141.271.3321.116.214.91.91.41.222.7Pass
PeTypic Argiudoll2155101.161.331.3417.614.213.81.51.31.3Pass
PeTypic Argiudoll2155101.271.391.3819.814.914.02.01.61.5Pass
PeTypic Argiudoll2555101.201.391.3823.616.514.91.61.42.322.4Pass
PeTypic Argiudoll2555101.151.331.3619.114.113.4Pass
PeTypic Argiudoll2555101.191.311.3821.115.214.2Pass
PeTypic Argiudoll2955101.161.321.3722.116.315.22.21.61.4Pass
PeTypic Argiudoll3355101.021.331.3621.615.914.9Pass

T: tillage; NT: no tillage.