Studies on growth and fruiting in the tomato. III. Effect of the early environment on growth and flowering. (3) Nitrogen, phosphorus and potassium nutrition.
Saito, T.; Hatayama, T.; Ito, H.
J. Jap. Soc. hort. Sci 32: 131-42
1963
Accession: 014203975
2 were grown in sand culture with a standard minor element content and different levels of N, P and K. Optimum concentrations for growth and flower formation were 120-160 p.p.m. N, 60-180 p.p.m. P and 60 p.p.m. K. Raising the N concentration increased vigour and reduced the time taken to differentiate flower buds under high light intensity. Under weak illumination the reverse occurred. The effects of increasing the P concentration were similar.