1. 1990
2. Water relations of salt stressed wheat

   Arif, H. (Awdur), Ion 1990

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1989
4. Vegetation succession following the clearance of Rhododendron in the Vale of Ffestiniog.

   Hockley, T. G. (Awdur), Hyd 1989

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. 1988
6. Studies of the biological activity of a novel herbicide (Triasulfuron) including studies of mobility and persistence in soils.

   Oppong, F. K. (Awdur), Hyd 1988

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. Cost benefit analysis and sustained yield forestry in India.

   Kumar, P. J. D. (Awdur), Price, C. (Goruchwylydd), Ion 1988

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

8. 1987
9. Forest recreation use patterns user behaviour and recreational value in Malaysia.

   Sabri, W. M. W. (Awdur), Tach 1987

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

10. Genetic and environmental factors in the migration of the African armyworm moth, Spodoptera exempta (Walker) (Lepidoptera :Noctuidae).

    Woodrow, K. P. (Awdur), Medi 1987

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

11. Studies of leaf growth in barley

    Maan, A. A. S. (Awdur), Ion 1987

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

12. 1986
13. Geochemical and mineralogical studies of the weathering of Silurian argillaceous rocks

    Chapman, P. (Awdur), Medi 1986

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

14. Sudies on the epidemiology of a Nigerian strain of Schistosoma haematobium with particular reference to the molluscan hosts

    Fryer, S. E. (Awdur), Maw 1986

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

15. Physiological aspects of tillering in barley (Hordeum distichum).

    Woodward, E. J. (Awdur), Ion 1986

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth