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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 on the canning quality of tomatoes (Lycopersicon esculentum) in south-western Nigeria. Acta Horticulturae (53): 171-180

In studies with 3 tomato cvs N, P and/or K were applied at low, optimum (N 40-60 kg/ha, P2O5 60 kg/ha and K2O 30-60 kg/ha) or high rates. Fruit total solids content increased at low-optimum P rates but decreased at high P rates. N and K at any rate had no effect on the total solids content. NPK at optimum rates increased titratable acidity, reducing sugars and ascorbic acid contents but decreased them at high rates.

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