Soil treatment

T0

Control soil

T1

Urea 150 kg N ha^{−}^{1}

T2

ATS as 32.5 kg S-ATS ha^{−}^{1} (i.e. 25 ppm S-ATS)

T3

ATS as 130 kg S-ATS ha^{−}^{1} (i.e. 100 ppm S-ATS)

T4

150 kg N ha^{−}^{1} as ATS (32.5 kg S ha^{−}^{1}) + urea (134 kg N ha^{−}^{1})

T5

150 kg N ha^{−}^{1} as ATS (130 kg S-ATS ha^{−}^{1} + urea (85 kg N ha^{−}^{1})