© 1982 by Institute of Chartered Foresters
Effect of Different Forms and Rates of Nitrogen Fertiliser on the Growth of Lodgepole Pine
Forestry Commission, Northern Research Station Roslin, Midlothian, Scotland
Application of four forms of nitrogen fertilizer each at three rates produced significant positive responses in shoot growth in a seven-year-old Pinus contorta, Dougl. stand on a deep, infertile peat in south Scotland. The response was shortlived (4 years) and was followed by a period (12 years) when shoot growth fell below the control level. Form of N did not affect the result but rate of N did and these effects are discussed with respect to annual shoot growth, foliar N levels and shoot growth:foliar N correlations.