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Proceedings of Past Forest Nursery Association Meetings:

Nursery Waste Water: The Problem and Possible Remedies
R. Kasten Dumroese , David L. Wenny and Deborah S. Page-Dumroese
1995: Kearney, NE
We found between 49 and 72% of the water applied to a production crop of
container-grown conifer seedlings was discharged from the nursery. The amount discharged
varied by species and by seedling growth stage. Our results showed between 32 and 60% of
all nitrogen was also discharged, again influenced by species and growth stage. In another
study, Douglas- fir and western white pine seedlings were grown using relative addition rate
fertilization and 60% less nitrogen than our conventional crop. Based on our results and the
literature, we feel a combination of improved greenhouse efficiency, irrigating crops based on
container capacity, using intermittent irrigation, and applying fertilizers with a relative
addition rate can improve irrigation and fertilization efficiency and reduce nursery runoff.
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