THE EFFECTS OF NITROGEN, PHOSPHORUS AND POTASSIUM ON THE CANNING QUALITY OF TOMATOES (LYCOPERSICON ESCULENTUM) IN SOUTH-WESTERN NIGERIA

The effects of nitrogen, phosphorus and potassium fertilizers on total solid, titratable acidity, reducing sugars and ascorbic acid of tomatoes were investigated.
Total solids content of tomato was increased when P level in the soil was low to optimum.
Above this it decreased.

N and K at any level had no effect on total solids.
N, P and K sometimes increased titratable acidity, reducing sugars and ascorbic acid contents, but decreased them when their rates were higher than the optimum level required by the tomato crop.
A small-fruited cultivar, Marzanino, had lower titratable acidity and reducing sugars than large-fruited Ronita and ""Ife No.1"" cultivars.
The significance of these fertilizer treatments and some cultural practices in improving canning qualities of tomatoes is discussed.

IV Africa Symposium on Horticultural Crops

R.A. Sobulo, A.O. Olorunda

https://doi.org/10.17660/ActaHortic.1977.53.23