Side dressing of Multi-K was carried out before bulbs enlargement
|
Crop/cultivar |
White Onion / Printon |
|---|---|
| Country / location | France / Rubescourt (80) in Picardie |
| Objectives | Enhance white onion yield by addition of K in form of Multi-K |
| Haifa product tested | Multi-K |
| Application method | Side dressing |
| Tested treatment | 1 x S.D. of 300 kg/ha Multi-K prills before bulbs start swelling |
| Control treatment results |
Marketable yield (bulbs > 35 mm in diameter) = 54 MT/ha Grower’s revenue from fresh yield: 108 US$/MT |
| Best treatment results |
Marketable yield (bulbs > 35 mm in diameter) = 58 MT/ha Grower’s revenue from fresh yield: 108 US$/MT |
| Characteristics of best treatment | Fresh yield increase: 4 MT/ha 1.1% increase in D.M. content, that’s considerable, but not enough for a better price, a bonus is given at 17% D.M. Increased return = 4 x 108= 432 US$/ha Cost of treatment (application + material)= 161 US$/ha |
| Net benefit of best treatment | 432 - 161= US$/ha |
| Benefit/Cost ratio | 432 / 161 = 2.68 |
| Conclusions |
Good results that justify further experimentation. The results could be more significant unless the plot was severely infected by Sclerotinia, which did not allow complete harvesting. |
| Reference | Illiaquer (a huge private company growing vegetables all over France) & Duclos. |
