Table 4: Summary of the effect of biochar rate on water-soluble (WS) manganese (Mn) and sulfur (S) over the 2023 growing season under simulated-furrow-irrigated rice on a silt-loam soil in the greenhouse.

Rate (Mg ha-1)

WS-Mn (mg kg-1)

WS-S (mg kg-1)

0

4.3 a

10.1 ab

2.5

3.5 b

10.5 a

5

3.3 b

10.1 b

†Means in a column with different letters are different at P < 0.05