OBSERVATIONS ON GROWTH AND DEVELOPMENT RATES OF TOMATO SEEDLINGS
For the various seasons of the year, under greenhouse conditions in The Netherlands, growth and development rates of tomato seedlings were determined. Improvements in the rooting-medium resulted in considerably better growth. Weight increase rates observed were sometimes as high as 50% per day. During most months of the year these very high rates were found. This indicates that, with the present cultural procedures, summer light intensities cannot be properly used for growth.
A complicating factor of these fast growth rates is that individual plants within a sowing will differ in weight quite considerably. And this is the more so a troublesome fact since differences in weight of upto 100% cannot be seen.
de Lint, P.J.A.L. and Klapwijk, D. (1973). OBSERVATIONS ON GROWTH AND DEVELOPMENT RATES OF TOMATO SEEDLINGS. Acta Hortic. 32, 161-172