Regression | Coefficients | Pr > F | |
Linear | 0.2051 | <0.0001 | |
Quadratics | 0.2258 | <0.0001 | |
Cross product | 0.0016 | 0.5608 | |
Total model | 0.4324 | <0.0001 | |
Settings | Coefficients | Pr > |t| | |
Constant | 1.5141 | <0.0001 | |
P | 0.0522 | <0.0001 | |
That | 0.0086 | 0.0007 | |
Mg | 0.0060 | 0.0268 | |
W × W | −0.0005 | <0.0001 | |
P × Ca | −0.00001 | 0.4696 | |
P × Mg | −0.00002 | 0.2568 | |
Ca × Ca | −0.0001 | 0.0012 | |
Ca × Mg | 0.00001 | 0.6300 | |
Mg × Mg | −0.00007 | 0.0121 | |
P × Ca × Mg | 4.63 × 10−8 | 0.8953 | |
Critical values | |||
Factors | Critical dose (kg/ha) | Optimal dose (kg/ha) | RDG (t/ha) |
P | 48.49 | 41 |
|
That | 40.23 | 37 | 3.06 |
Mg | 33.07 | 29 |
|