Table 1.
Summary of different inoculation treatments applied in the small plot field trials to evaluate their relative effect on maize yield
| Trial type | Design | Inoculant | Treatment | P2O5 kg/ha (seed-placed) | Field sites | Year(s) |
|---|---|---|---|---|---|---|
| Efficacy | Split plot | Jumpstart commercial rate* | 0, 10, 20 | Fergus Falls, MN; DeWitt, NE; and Jeffers MN | 2006 | |
| Formulation | Split plot | Jumpstart commercial rate* | New JumpStart formulation commercial rate† | 0, 10, 20, 30 | Aurora, NE (2009, 2010); Centerville, SD (2009, 2010); Fergus Falls, MN (2009); Garden City KS (2009); Groom, TX (2009); Britten, SD (2010); University of Nebraska, NE (2010) | 2009, 2010 |
| Application dribble band | RCB‡ | Jumpstart commercial rate* | 10 | DeWitt NE (2006); Fergus Falls, MN (2006, 2007, 2008); Centerville, SD (2007, 2008); Jeffers, MN (2006); Gardener, ND (2008); York, NE (2007) | 2006, 2007, 2008 | |
| Application granule | RCB‡ | Jumpstart commercial rate* | Granules at 1, 2 and 3 times commercial seed rate | 10 | DeWitt NE (2006); Fergus Falls, MN (2006, 2007, 2008); Centerville, SD (2007, 2008); Jeffers, MN (2006); Gardener, ND (2008); York, NE (2007) | 2006, 2007, 2008 |
| Miscellaneous inoculant combinations§ | RCB‡ | Jumpstart commercial rate* | JumpStart with and without other commercial inoculants | 10 | 60 | 2006–2010 |
*
5 × 104 colony forming units (cfu) P. bilaiae/seed.
†
Test formulation.
‡
Randomized complete block.
§
Individual trial data not included.