A 2-year old stand of Pangola grass (Digitaria eriantha) field was divided equally into 4 field blocks according to the slope. Each block was sub-divided into 3 plots (4x5 m2) and each plot was separated by 1.5 m spacing. Treatments were arranged into randomized complete block design with 4 field blocks as replication. Three treatments consisted of 1) no sulfur application (control) 2) sulfur application at the rate of 12 kgS/rai and 3) sulfur application at the rate of 24 kgS/rai. All plots were fertilized with basal plant nutrients at 20 kg P2O5/rai, 20 kg K2O/rai and 21 kg
N/rai at the start of the experiment. Rate of each fertilizer application was presented in Table 1.
Treatment pastures were applied by ammonium sulfate and urea before the experiment had started,
while urea was a sole nitrogen source in the control plot.