Potassium nutrition of the strawberry plant I.—Rates of dry matter production and potassium uptake: Effect of potassium supply on components of yield

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Abstract
Rates of dry matter production and potassium uptake by three varieties of strawberry were studied in a sand culture experiment, with containers of 780 ml water retention capacity, in relation to the effect of potassium supply on components of yield.Potassium, applied at the levels in this experiment, had little effect on the potential yield of the plant as determined by numbers of flowers initiated but a positive effect on the actual yield as determined by % flower set, yield of fruit and degree of berry expansion. The major factor which limited yield, however, was the failure of the berries to expand to their maximum size.It is suggested that in future experiments plants should be grown in containers of sand which have at least 2000 ml water retention capacity and that the nutrient solutions applied should be more dilute.