Table 1.
Principle soil properties before treatment.
Fig 1.
Depth distribution of the soil bulk density (ρb) under different tillage practices.
No till (NT), rotary tillage (RT) and plow tillage (PT); (A) after the maize harvest and (B) after the wheat harvest. The data are presented as the means ± SD (n = 3). The various capital letters indicate significant differences among the soil depths, and the lowercase letters indicate significant differences among the treatments (P<0.05).
Fig 2.
Depth distribution of the soil organic carbon (SOC) concentration under different tillage practices.
No till (NT), rotary tillage (RT), and plow tillage (PT): (A) after the maize harvest and (B) after the wheat harvest. The data are presented as the means ± SD (n = 3). The various capital letters indicate significant differences among the soil depths, and the lowercase letters indicate significant differences among the treatments (P<0.05).
Fig 3.
Depth distribution of the soil total nitrogen (TN) concentration under different tillage practices.
No till (NT), rotary tillage (RT), and plow tillage (PT): (A) after the maize harvest and (B) after the wheat harvest. The data are presented as the means ± SD (n = 3). The various capital letters indicate significant differences among the soil depths, and the lowercase letters indicate significant differences among the treatments (P<0.05).
Table 2.
Storage of the soil organic carbon (SOC) and total nitrogen (TN) for the wheat and maize seasons.
Table 3.
Stratification ratio (SR) of the soil organic carbon (SOC) and the total nitrogen (TN) for the wheat and maize seasons.
Fig 4.
Stratification ratio (SR) related to storage of (A) soil organic carbon and (B) nitrogen.