References:

Berlyn, G.P. and R.C. Beck. 1980. Tissue culture as a technique ~or studying menstematic activity. in C. H. A. Little (ed), Control of shoot growth in trees. Proc. Intern. Union Forest Res; Organ. Fredericton, N. B. Canada. p. 305-324.

Berlyn, G.P. and R.O. Russo. 1990. The use of organic biostimulants to help low input sustainable agriculture. J. Sustainable Agric. (in press).

Berlyn, G.P., Dasappa, A. Lctourneau and AO. Anoruo. 1990. Some effects of nonhormonal biosti~mulants on the growth of Caribbean Pine (Pinus caribaea Mor. var. hondurensis Barr. & Golf.) (in preparation).

Booth, E. 1966. Some properties of seaweed manures.in E.D. Young and L. McLacblan (eds), Proc. Fifth International Seaweed Symposium. Pergamon Press, Oxford. p. 349-357. Hernando F. V. 1968. The action of humic acid of different sources on the development of plants and their effect on increasing concentration of the nutrient solution. in Organic matter and soil fertility. Study Week, April 22-27, 1968. Vatican City. North Holland Publishing Company, Amsterdam. p. 805-856.

Metting, B. 1985. Agronomic uses of algae. I. Phycol. (Suppl.):10.

Oertli, 1987. Exogenous applications of vitamins as regulators for growth and development of plants: A review. Z. Pflanzenernabr Bodenk. 150:375-391.

Russo, R.O. 1989. The effect of roots on the growth of coffee seedlings (unpublished). Russo, R.O. and G.P Berlyn. 1989. The effect of a new growth biostiinulant on acetylene reduction in nodulated seedlings of Alnus ascuminata. Abstracts of Nitrogen Fixing Meeting, Ames, Iowa, August 1989.

Sean, T.L. and A.R. Kingman. 1973. A review of humus and huinic adds. The South Carolina Agricultural Experiment Station, Clemson University, Research Series No. 145. 18 p.