Table 1 Timing and rate of nitrogen application (kg ha⁻¹) for summer maize and winter wheat.

Crop	Treatment	Timing and rate of nitrogen application (kg ha⁻¹)
Crop	Treatment	Before seeding	Jointing	Tasseling (maize)	Total
Winter wheat	N0	0	0	—	0
	N1	50	118	—	168
	N2 & RN2^†	72	168	—	240
	N3	90	210	—	300
Summer maize	N0	0	0	0	0
	N1	21	63	45	129
	N2 & RN2^†	30	90	65	185
	N3	50	145	105	300

^†Nitrogen rates in the RN2 treatment were 0 kg N ha⁻¹ in 2009–2011 and were 240 and 185 kg N ha⁻¹ in 2012–2016 for wheat and maize, respectively.

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