DAWSON, S. O., D. G. KOWALSKI and P. J. DART (1989): Variation with soil depth, topographic position and host species in the capacity of soils from an Australian locale to nodulate Casurina and Allocasurina seedlings. Plant Soil 118: 1-11.10.1007/BF02232785
DEVAGIRI, G. M., R. C. DHIMAN, Y. P. SINGH and S. K. PATIL (2001): Seed source dependent variation in mycorrhizal colonization and nutrient uptake in Dalbergia sissoo seedlings. Journal of Tropical Forest Science 13(2): 246-257.
KUENEMAN, E. A., W. R. ROOT, K. E. DASHIELL and J. HOHENBERG (1984): Breeding soybeans for the tropics capable of nodulating effectively with indigenous Rhizobium species. Plant Soil 82: 387-386.10.1007/BF02184276
MIETTINEN, P., M. Karsisto and G. M. MUSA (1992): Nodulation of nine nitrogen fixing tree species grown in central Sudan. For. Ecol. Management 28: 1-6.
POKHRIYAL, T. C., S. P. CHAUKIYAL and H. B. NAITHANI (1993): Nitrogen fixation and nodulation behaviour of some nitrogen fixing species from inner and outer Himalaya. Indian Forester 119: 310-319.
SANGINGA, N. K., B. MARIQUE and G. HARDENSON (1991): Variation in nodulation and nitrogen fixation by Gliricidia sepium/Rhizobium spp. symbiosis in a calcareous soil. Biol. Fertil. Soils 11: 273-278.