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Leaching of Nitrogen and Phosphorus during Production of Forest Seedlings in Containers

Marja-Liisa Juntunen*,a, Taina Hammarb and Risto Rikalaa

a The Finnish Forest Research Institute, Suonenjoki Research Station, FIN-77600 Suonenjoki, Finland
b North Savo Regional Environment Centre, P.O. Box 1049, FIN-70101 Kuopio, Finland



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  		Fig. 1. (A) Scheduling of culturing practices for birch, pine, first- and second-season spruce, and (B) height development of seedlings during the 1995 growing period. {blacksquare}, sowing; {diamondsuit}, transplanting; {square}, separation of trays. Symbols for tree species in (B) describe the dates of liquid fertilization in (A).

 


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  		Fig. 2. Monthly amounts of precipitation, irrigation and leachate (mm) for (A) first-season spruce, (B) second-season spruce, (C) pine, and (D) birch in 1995, and for pine in (E) Ecopot and (F) Plantek containers in 1996.

 


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  		Fig. 3. Leachate volume (mm, bars), N concentration (mg L-1, dots), and amount (kg ha-1, bars) of N leached from birch and pine containers from May to October in 1995.

 


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  		Fig. 4. Leached amounts of NO3–N, NH4–N, and organic N by (A) tree species in 1995 and (B) container types in 1996.

 




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The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
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