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Purpose
Evaluate weed suppression and biomass production of five cover crops seeded following snap beans.
- Cooperator: Ed Cagney
- Nearest town: Kalamazoo
- Soil type: Kalamazoo loam
- Seeding method: Broadcast, then disked
- Planting date: (July 30, 1998) (August 3, 1999)
- Sampling date: (October 28, 1998) (October 19, 1999)
- Exp. design: RCB, four replications
Treatments and Results
- First column: 1998
- Second column: 1999
| Treatments: |
Rate
(lb/A) |
Cover Crop Biomass
(lb/A) |
Weed Biomass
(lb/A) |
| Oilseed Radish (including root) |
15 |
3683 a |
1748 a |
34 a |
0 a |
| Hairy Vetch |
25 |
2233 b |
826 c |
975 ab |
51 a |
| Oats |
48 |
2619 b |
1123 b |
551 ab |
61 a |
| Crimson Clover |
12 |
2923 ab |
239 d |
1470 bc |
52 a |
| Canadian Mammoth Red Clover |
12 |
1000 c |
165 d |
2083 c |
154 a |
| Control |
|
0 |
0 |
3966 d |
60 a |
| LSD(0.05) |
|
1020 |
234 |
988 |
159 |
Conclusions
1998:
- Oilseed radish yielded significantly more biomass than all other cover crops with the exception of crimson clover.
- Canadian mammoth red clover provided the lowest cover crop biomass.
- Oilseed radish was significantly better at weed suppression than crimson clover and Canadian mammoth red clover.
- Oilseed radish, hairy vetch and oats were significantly better at weed suppression than Canadian mammoth red clover.
- There were significant differences between all cover crops as compared to the control for weed biomass.
1999:
 Oilseed radish yielded significantly more biomass than all other cover crops.- Canadian mammoth red clover and crimson clover provided the lowest cover crop biomass and was significantly lower than all other cover crops.
- Weed biomass showed no significant difference of weed suppression by cover crops and no difference compared to the control.
- Droughty summer conditions affected this experiment.
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