| Plot Activity | Chickasha | Hennessey | Covington | Lahoma | Blackwell | Haskell | Cuidad Obregon, MX | Ciudad Obregon 1 (see pictures) | Ciudad Obregon 2 | ||
| planting date | 18/10/01 | 30/10/01 | 25/9/01 | 03/10/01 | 17/10/01 | 19/10/01 | 5/12/01 | 13/12/01 | |||
| variety | Jagger | Jagger | Common | Jagger | Custer | 2137 | Rayon | Rafi | |||
| seeding rate, kg ha-1 | 87 | 90 | 101 | 87 | 112 | 90 | 100 kg/ha | 120 kg/ha | |||
| Sensor date | 27/02/02 | 26/03/02 | 22/03/02 | 26/03/02 | 14/04/02 | 21/01/02 | 29/01/02 | ||||
| Days from Planting to Sensing | 132 | 147 | 175 | 158 | 177 | 47 | 48 | ||||
| Days from Planting to Sensing (GDD>0) | 87 | 93 | 115 | 110 | 126 | 47 | 48 | ||||
| preplant fertilization date | 09/09/01 | 26/09/01 | 30/08/01 | 17/09/02 | 27/09/01 | 12/11/01 | 14/11/01 | ||||
| topdress fertilization date | 01/03/02 | 27/03/02 | 23/03/02 | 27/03/02 | 16/04/02 | 22/01/02 | 31/01/02 | ||||
| Response Index | 1.10 | 1.19 | 1.28 | 1.10 | 1.10 | 1.00 | 1.00 | ||||
| harvest date | |||||||||||
| Preplant N , kg/ha | Topdress N, kg/ha |
Yield, kg/ha (Topdress N, kg/ha) |
Preplant N, kg/ha | Topdress N, kg/ha |
Yield, kg/ha (Topdress N, kg/ha) |
||||||
| 0 N | 3008 | 3474 | 2046 | 4170 | 1267 | 0 | 0 | 6007 | 5867 | ||
| 0 | 45 | 3081 | 3321 | 2425 | 4241 | 1371 | 0 | 83 | 5858 | 6004 | |
| 0 | 90 | 1938 | 3859 | 2442 | 4081 | 1158 | 0 | 167 | 6208 | 6522 | |
| 45 | 45 | 2141 | 3629 | 2901 | 3920 | 1311 | 0 | 250 | 6800 | 6567 | |
| 45 | 0 | 2839 | 3968 | 2517 | 4209 | 1238 | 0 | NFOA (urea) | 6072 (19) | 5467 (35) | |
| 90 | 0 | 2191 | 3473 | 2724 | 4235 | 1169 | 0 | NFOA (UAN) | 5648 (24) | 5734 (34) | |
| 0 | New NFOA | 2625 (12.3) | 3703 (15.3) | 2190 (8.3) | 4286 (8.2) | 1287 (3.4) | |||||
| 45 | New NFOA | 2375 (12.6) | 3373 (16.9) | 2484 (9.9) | 4350 (10.1) | 1382 (3.8) | |||||
| 0 | Average NFOA | 2783 (12.3) | 3531 (15.3) | 2149 (8.3) | 4299 (8.2) | 1440 (3.4) | |||||
| 45 | Old NFOA | 2154 (62.5) | 3447 (52.6) | 2645 (12.5) | 4247 (12.7) | 1386 (3.3) | |||||
| opti-crop | |||||||||||
| SED | 209 | 255 | 152 | 244 | 99 | 227 | 807 | ||||
| Soil Characteristics | |||||||||||
| soil pH | 7.1 | 5.9 | 6.1 | 5.6 | 6.8 | 4.4 | 8.2 | ||||
| organic C, g kg-1 | 7 | 9.91 | 8.64 | 8.6 | 9.2 | ||||||
| total N, g kg-1 | 0.67 | 1.05 | 0.92 | 0.71 | 0.74 | 0.72 | |||||
| P, mg kg-1 | 132 | 8 | 19 | 21 | 45 | 17.8 | 67* | ||||
| K, mg kg-1 | 800 | 193 | 181 | 345 | 410 | 76 | 513 | ||||
| NH4-N, mg kg-1 | 36 | 2.6 | 6.1 | 3.8 | 14.3 | 27.6 | 5.2 | ||||
| NO3-N, mg kg-1 | 9 | 2.7 | 1.4 | 2.8 | 18.2 | 13.3 | 20.0 | ||||
| Preplant P fertilizer applied, kg P, ha-1 | 8 | ||||||||||
| Preplant N Fertilizer, kg N/ha | 75 | ||||||||||
OFIT Trials 2001
