PPO report:

The Holland-hydra ebb and flow system has been tested the best by the independentresearch institute for flowerbulbs (PPO) in 2003. This test was about cost price and expenditure at growing tulips.

Conclusions made in this report:

1. Planting is cheaper than on peatmoss
2. Less time spending on inhousing and cleaning than on peatmoss
3. Less labour because of the low weight of the trays
4. An equal time in the greenhouse as the rootingtime
5. More rooting than on dead water growing
6. Better take-up of suplements than on dead water
7. Recycling recources
8. Less time spending on harvesting
9. Saving of transport during cleaning of the trays
10. Emtying the trays saves time because of the low weight of the trays and only the remains of the roots have to be removed.

More in the PPO-report: Generall premisses - description of the different growing systems and a analysis of the strong and weak points - means, method and chosen premisses to calculate the cost prise and energie use - results, conclusions and recommandations.

This report can be ordered only in Holland.
Dit rapport is te bestellen bij PPO door overboeking van 10,00 euro op bankrekening 36.70.17.369 van de Rabobank Wageningen t.n.v. Praktijkonderzoek Plant & Omgeving - Publicatieverkoop Lelystad. Vermeld op uw betaalopdracht het PPO-nummer 706, het gewenste aantal exemplaren en uw volledige adres.