Urea Application Rate for Crop Straw Decomposition in Temperate China

Table 4

Enquiry table for the urea application rate of wheat straw returning to the field with different yields per unit area.

Yield per unit area of wheat	Urea dosages of different C : N adjustment targets
	25 : 1	30 : 1	35 : 1
1500	54.90	42.15	32.85
1875	68.70	52.65	41.10
2250	82.35	63.15	49.35
2625	96.15	73.65	57.60
3000	109.80	84.15	65.85
3375	123.60	94.65	74.10
3750	137.25	105.15	82.20
4125	151.05	115.65	90.45
4500	164.70	126.30	98.70
4875	178.50	136.80	106.95
5250	192.15	147.30	115.20
5625	205.95	157.80	123.45
6000	219.75	168.30	131.55
6375	233.40	178.80	139.80
6750	247.20	189.30	148.05
7125	260.85	199.80	156.30
7500	274.65	210.45	164.55
7875	288.30	220.95	172.80
8250	302.10	231.45	180.90
8625	315.75	241.95	189.15
9000	329.55	252.45	197.40

Unit: kg/ha.