Changing the inoculant industry one bushel at a time.
Yield Data
2002 Soybean Yield Data2003 Soybean Yield Data
2004 Independent
Peanut Yield Data
2004 N-ROW Pea Trial
2005 Pea Yield Data
Citron Yield Data
2005 Citron Yield Data
Field Pea Inoculation Trial
2004
NDSU Carrington Research Extension Center
A field pea inoculation trial was conducted at the NDSU Carrington Research Extension Center to
compare inoculant treatments submitted by commercial manufacturers / distributors to an absolute
control (no inoculum, no N fertilizer) and a treatment with 60 lbs. total N (soil test +
fertilizer) / acre.
The experiment was installed on a Heimdal silt loam soil with a loose history of field pea production.
A soil test the previous fall indicated 34 lbs NO3--N / acre in the top 24 inches. The soil tested
12 ppm (Olsen) for phosphate, which is considered to be in the "high" range. Cultivar 'Integra'
(yellow-cotyledon) was sown at the rate of 300,000 live seeds / acre on 20 May in a randomized
complete block design with six replicates. Individual plots were 7 (7") rows wide x 25' long.
Weeds were effectively controlled with a preplant application of Sonalan and post-emergence hand
rouging. Disease and insect pests were not detected.
Early stand counts indicated plant emergence considerably below the target population (Table 1).
This phenomenon has been observed previously, with no indication of the causal agent. Recent
experiments with fungicide seed treatments have not provided the answer. Although stands were
lower than desired, differences among treatments were not statistically significant.
All inoculation treatments were numerically superior to the control in visual nodulation scores on
15 July and 15 were significantly better. However, these differences were not translated into
significant differences in days to end bloom or physiological maturity, plant height, lodging, test
weight, or seed weight.
Pea yields were exceptional, with a trial average of 77.7 bushels / acre. Although no differences
were statistically significant (P<0.05), all but one inoculant treatment numerically increased yield.
Soil Implant, TagTeam Peat, Nitragin Experimental 2, SowFast Liquid, and N-Row all resulted in yields
above 80 bushels / acre (a 19 - 25% increase over the uninoculated control.
| North Dakota State University | Carrington, ND (Peas) |
| N-ROW | 80.6 |
| Cell-Tech | 79.3 |
| N-TAKE | 79.2 |
| Implant | 78.3 |
| So-Fast Granular | 78.0 |
| Tag Team Liquid | 77.2 |
| Bio-Riz | 75.4 |
| Rhizo-Flo | 75.2 |
| Control | 68.0 |