Table 3.
Actual versus Integrated Farm System Model (IFSM) simulated annual production and purchases for cooperating beef farms in Cerrado and Amazon biomes.
| Beef System Output | Cooperating Cerrado Farm | Cooperating Amazon Farm | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2016–2017 | 2017–2018 | 2015–2016 | 2016–2017 | 2017–2018 | ||||||
| Actual | Simulated | Actual | Simulated | Actual | Simulated | Actual | Simulated | Actual | Simulated | |
| Grazed pasture (t DM/ha) |
- | 3.03 | - | 4.89 | - | 3.66 | - | 2.97 | - | 1.79 |
| Calculated a forage DMI required (t DM/ha) | ||||||||||
| Minimum at 1.8% | 2.99 | - | 4.64 | - | - | - | - | - | - | - |
| Maximum at 2.5% | 4.15 | - | 6.44 | - | 3.94 a | - | 2.89 a | - | 2.37 a | - |
| Production (t DM/ha) | ||||||||||
| Soybean | - | - | - | - | - | - | 2.41 | 2.62 | 2.08 | 2.15 |
| Purchases (t DM/ha) | ||||||||||
| Forage | - | 0.90 | - | 1.68 | - | 0.57 | 0.31 | 0.34 | 0.47 | 0.30 |
| Corn grain | 0.21 | 0.18 | 0.34 | 0.22 | 0.48 | 0.52 | 0.30 | 0.16 | 0.35 | 0.19 |
| Cottonseed | - | - | - | - | 0.03 | 0.04 | - | - | - | - |
| Soybean, 44% protein | 0.19 | 0.24 | 0.30 | 0.29 | 0.14 | 0.18 | 0.10 | 0.14 | 0.08 | 0.24 |
| Minerals | 0.25 | 0.18 | 0.41 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.01 | 0.01 |
| Grazed pasture (t DM/head) |
- | 2.19 | - | 1.43 | - | 5.60 | - | 6.11 | - | 3.61 |
| Calculated a forage DMI required (t DM/head) |
||||||||||
| Minimum at 1.8% | 1.83 | - | 1.97 | - | - | - | - | - | - | - |
| Maximum at 2.5% | 2.55 | - | 2.74 | - | 6.03 a | - | 5.95 a | - | 4.78 a | - |
| Purchases (t DM/head) | ||||||||||
| Forage | - | 0.55 | - | 0.66 | - | 0.87 | 0.64 | 0.70 | 0.95 | 0.61 |
| Corn grain | 0.13 | 0.11 | 0.14 | 0.86 | 0.73 | 0.80 | 0.62 | 0.33 | 0.71 | 0.38 |
| Soybean, 44% protein | 0.11 | 0.14 | 0.12 | 0.12 | 0.21 | 0.28 | 0.21 | 0.29 | 0.16 | 0.48 |
| Minerals | 0.16 | 0.11 | 0.16 | 0.01 | 0.03 | 0.03 | 0.04 | 0.04 | 0.02 | 0.02 |
| Beef production (kg BW/ha) |
- | - | - | - | 231 | 267 | 243 | 236 | 289 | 248 |
a For cooperating farm in Cerrado biome, calculated from National Research Council (NRC) dry matter intake (DMI) requirements for beef cattle at daily DMI per cattle body weight of 1.8% (minimum) and 2.5% (maximum). For cooperating farm in Amazon biome, calculated from NRC dry matter intake (DMI) requirements for beef cattle at daily DMI/cattle body weight of 2.5%.