Experimental site | Plant nutrient | Regression equation | Physical optima (kg ha −1 ) | Economical optima (kg ha −1 ) |
---|---|---|---|---|
CSIR-IHBT | Nitrogen | y = 0.795 + 0.0192*x − 0.00009*x2 | 106.67 | 106.16 |
Potassium | y = 0.89 + 0.0358*x − 0.0004* x2 | 44.62 | 44.43 | |
RHRS | Nitrogen | y = 0.705+ 0.005*x − 0.000006* x2 | - | - |
Potassium | y = 0.665 + 0.0159*x − 0.0002* x2 | 39.75 | 39.37 | |
PAU | Nitrogen | y = 0.17+ 0.0134*x − 0.00009* x2 | 74.44 | 73.93 |
Potassium | y = 0.55 + 0.0036*x − 0.00004* x2 | 45.00 | 43.08 |