Performance of Sorghum Varieties under Variable Rainfall in Central Tanzania

Table 1

Soil physical and chemical properties used for the calibration of APSIM.

Soil parameters	Layers
	BD (g cm^−3)	1.38	1.47	1.44	1.38	1.51	1.51
SAT (cm cm^−1)	0.37	0.35	0.34	0.33	0.33	0.33
LL (cm cm^−1)	0.084	0.084	0.134	0.134	0.134	0.14
DUL (cm cm^−1)	0.248	0.299	0.334	0.278	0.270	0.270
Clay (%)	19	20	23	25	34	30
Silt (%)	5	4	4	5	2	4
CEC (cmol/kg)	6.0	8.2	9.2	10.2	10.0	6.0
Soil C parameters
Organic C (g 100 g^−1)	0.41	0.31	0.23	0.14	0.14	0.06
Finert	0.4	0.6	0.8	0.8	0.9	0.9
Fbiom	0.025	0.02	0.015	0.01	0.01	0.01

BD: bulk density; SAT: volumetric water content at saturation. LL is wilting point (volumetric water content at −15 bar pressure potential) and DUL is drained upper limit.
Layer thickness (mm).
Proportion of soil carbon assumed not to decompose.
Proportion of decomposable soil carbon in the more labile soil organic matter pool.