| OLS | MLE | |||||
| Output (kgs) | Estimate | Std. Error | t value | Parameter | Std. Error | t-value |
| (Intercept) | 1.926 | 5.737 | 0.336 | 2.676 | 3.982 | 0.672 |
| Land (acres) | 2.373*** | 0.620 | 3.827 | 1.964*** | 0.499 | 3.936 |
| Seed (kgs/acre) | 0.970 | 2.291 | 0.423 | 0.785 | 1.590 | 0.494 |
| Fertilizer (kgs/acre) | 0.328* | 0.188 | 1.742 | 0.205 | 0.171 | 1.203 |
| Herbicides (lts/acre) | 2.895 | 2.083 | 1.390 | 0.837 | 1.412 | 0.593 |
| Insecticides (lts/acre) | −3.444* | 1.793 | −1.921 | −2.938* | 1.535 | −1.914 |
| Pesticides (lts/acre) | 2.714 | 1.977 | 1.373 | 1.517 | 1.367 | 1.110 |
| Labor (man days) | −0.245 | 1.225 | −0.200 | 0.547 | 0.997 | 0.549 |
| Land * land | −0.283*** | 0.058 | −4.875 | −0.267*** | 0.055 | −4.854 |
| Land * Seed | −0.124 | 0.127 | −0.975 | −0.077 | 0.106 | −0.729 |
| Land * Fertilizer | 0.008 | 0.014 | 0.545 | 0.011 | 0.013 | 0.851 |
| Land * Herbicides | 0.204 | 0.139 | 1.467 | 0.192 | 0.130 | 1.473 |
| Land * Insecticides | −0.005 | 0.146 | −0.034 | 0.139 | 0.134 | 1.037 |
| Land * Pesticides | −0.201 | 0.139 | −1.450 | −0.035 | 0.125 | −0.279 |
| Land * Labor | 0.009 | 0.095 | 0.090 | 0.033 | 0.085 | 0.392 |
| Seed * Seed | −0.219 | 0.483 | −0.453 | −0.095 | 0.336 | −0.282 |
| Seed * Fertilizer | −0.029 | 0.038 | −0.758 | −0.009 | 0.034 | −0.262 |
| Seed * Herbicides | −0.504 | 0.423 | −1.192 | −0.154 | 0.290 | −0.531 |
| Seed * Insecticides | 0.800** | 0.370 | 2.164 | 0.652** | 0.319 | 2.042 |
| Seed * Pesticides | −0.123 | 0.417 | −0.294 | −0.094 | 0.306 | −0.308 |
| Seed * Labor | 0.126 | 0.239 | 0.528 | −0.118 | 0.204 | −0.579 |
| Fertilizer * Fertilizer | −0.050 | 0.034 | −1.489 | −0.041 | 0.032 | −1.261 |
| Fertilizer * Herbicides | −0.009 | 0.044 | −0.218 | −0.006 | 0.041 | −0.150 |
| Fertilizer * Insecticides | 0.034 | 0.041 | 0.812 | 0.026 | 0.039 | 0.667 |
| Fertilizer * Pesticides | 0.004 | 0.044 | 0.080 | 0.053 | 0.044 | 1.215 |
| Fertilizer * Labor | −0.009 | 0.029 | −0.299 | −0.016 | 0.026 | −0.595 |
| Herbicides * Herbicides | −0.710 | 0.538 | −1.319 | −0.833* | 0.452 | −1.843 |
| Herbicides * Insecticides | 0.292 | 0.363 | 0.804 | 0.277 | 0.310 | 0.893 |
| Herbicides * Pesticides | −0.161 | 0.374 | −0.430 | 0.450 | 0.351 | 1.282 |
| Herbicide * Labor | −0.210 | 0.351 | −0.598 | −0.037 | 0.338 | −0.110 |
| Insecticides * Insecticides | −0.686 | 0.465 | −1.477 | −0.363 | 0.460 | −0.790 |
| Insecticides * pesticides | 0.607* | 0.338 | 1.795 | 0.575* | 0.297 | 1.937 |
| Insecticides * Labor | −0.005 | 0.271 | −0.019 | −0.065 | 0.253 | −0.258 |
| Pesticide * Pesticides | −1.424** | 0.565 | −2.519 | −1.694*** | 0.479 | −3.534 |
| Pesticides * Labor | −0.602** | 0.286 | −2.103 | −0.380 | 0.248 | −1.531 |
| Labor * Labor | 0.009 | 0.159 | 0.055 | 0.037 | 0.144 | 0.254 |