1. Effect of irrigation and fertilisation on mineral nutrients in Scots pine needles;Aronsson,1980
2. Biomass production and nitrogen recovery after fertilisation of young loblolly pines;Baker,1974
3. Fertilisation of plantations;Ballard,1984
4. Distribution and balance of 15N labelled fertiliser nitrogen applied to young pine trees (Pinus sylvestris L);Björkman;Stud. For. Suec.,1967
5. Nitrogen-Total;Bremner,1982