Table 4. Annual Total Revenue, Cost, and Net Returns of Crop Production with Different Treatments in 2016–2018a.
| year | treatment | total revenue($ ha–1 year–1) | N fertilizer cost | ZNC cost | labor cost of fertilization | other cost | net returns | net return change relative to CFF (%) |
|---|---|---|---|---|---|---|---|---|
| 2016 | CK | 2666.7 | 0.0 | 0.0 | 30.8 | 615.4 | 2020.6 | |
| CFF | 3526.6 | 120.4 | 0.0 | 92.3 | 615.4 | 2698.5 | ||
| CP0 | 3771.1 | 231.8 | 0.0 | 30.8 | 615.4 | 2893.1 | 7.2 | |
| CP1 | 4229.0 | 231.8 | 11.5 | 30.8 | 615.4 | 3339.5 | 23.8 | |
| CP2 | 4080.9 | 231.8 | 23.1 | 30.8 | 615.4 | 3179.8 | 17.8 | |
| CP3 | 3979.9 | 231.8 | 34.6 | 30.8 | 615.4 | 3055.7 | 13.2 | |
| 2017 | CK | 2901.9 | 0.0 | 0.0 | 30.8 | 615.4 | 2255.7 | |
| CFF | 3143.0 | 120.4 | 0.0 | 92.3 | 615.4 | 2314.9 | ||
| CP0 | 3803.4 | 231.8 | 0.0 | 30.8 | 615.4 | 2925.4 | 26.4 | |
| CP1 | 4155.0 | 231.8 | 11.5 | 30.8 | 615.4 | 3265.4 | 41.1 | |
| CP2 | 3837.4 | 231.8 | 23.1 | 30.8 | 615.4 | 2936.4 | 26.9 | |
| CP3 | 3763.6 | 231.8 | 34.6 | 30.8 | 615.4 | 2839.5 | 22.7 | |
| 2018 | CK | 1828.6 | 0.0 | 0.0 | 30.8 | 615.4 | 1828.6 | |
| CFF | 2464.2 | 120.4 | 0.0 | 92.3 | 615.4 | 2464.2 | ||
| CP0 | 2900.1 | 231.8 | 0.0 | 30.8 | 615.4 | 2900.1 | 17.7 | |
| CP1 | 3216.3 | 231.8 | 11.5 | 30.8 | 615.4 | 3216.3 | 30.5 | |
| CP2 | 2967.2 | 231.8 | 23.1 | 30.8 | 615.4 | 2967.2 | 20.4 | |
| CP3 | 2836.5 | 231.8 | 34.6 | 30.8 | 615.4 | 2836.5 | 15.1 |
a
Note: Typical prices in China (USD): rice, $461.5 t–1; CRU, $533.9 t–1; urea, $307.7 t–1; calcium superphosphate, $123.1 t–1; potassium chloride, $307.7 t–1; labor cost of fertilization for one time, $30.8 ha–1. Other cost included machinery, irrigation, pesticides, insecticides, seeds, P fertilizer, K fertilizer, and other materials and expenses.