. 2020 Apr 1;10:5763. doi: 10.1038/s41598-020-62611-w

Table 3.

Grain yields of maize, PUEs and net profit of different fertilization treatments.

Treatment	Grain yield of maize (g/pot)	PUE (%)	Income ($/hm²)	Fertilizer costs ($/hm²)	Labor cost ($/hm²)	Net profit ($/hm²)	Change relative to P1 (%)
Treatment	Grain yield of maize (g/pot)	PUE (%)	Income ($/hm²)	Fertilizer costs ($/hm²)	Labor cost ($/hm²)	Net profit ($/hm²)	Grain yield	PUE	Net profit
P0	113.7 cd	—	2692.72	643.70	72.5	656.02	−8.38	—	−15.80
P1	124.1 c	19.6	2939.02	766.84	72.5	779.17	—	—	—
C40P1	153.5 a	38.0	3635.28	796.33	72.5	1445.95	23.69	93.88	85.58
C60P1	134.2 bc	31.7	3178.21	815.93	72.5	969.28	8.14	61.73	24.40

Note: The maize yield per hectare was calculated as 83325 maize plants. Materials costs were calculated according to the local price. The price of maize grain was 284.22 $/ton, CDAP was 540.28 $/ton, urea was 238.80 $/ton, labor cost for one fertilization was 72.5 $/hm², other costs (1320.5 $/hm²) included irrigation, pesticides, seeds and other materials and expenses during the maize growth season.