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Sweet cherry nutrition: Effects of phosphorus and other major elements on vigour, productivity, fruit size and fruit quality of 'Kristin' sweet cherries grown on a virgin, acid soil



Sweet cherry nutrition: Effects of phosphorus and other major elements on vigour, productivity, fruit size and fruit quality of 'Kristin' sweet cherries grown on a virgin, acid soil



Norwegian Journal of Agricultural Sciences 9(1-2): 105-114



'Kristin' sweet cherry responded positively to phosphorus fertilization in a field trial carried out over a period of 13 years on a virgin, acid soil low in plant available P and exchangeable K, Mg and Ca. Application of 20 kg P ha-1 per year significantly increased tree size as measured by trunk girth, cumulative yield, yield efficiency and fruit size. The sweet cherry trees had a sufficient supply of P when soil plant available P was above 4 mg P/100 g and leaf P was in the range 0.20-0.30% P. The soil non-exchangeable potassium (180 mg K/100 g) contributed consistently over time to meet the demand for K. Accumulated yield, however, was increased by application of 60 kg K ha-1 per year. Fruit quality as measured by soluble solids was negatively affected by phosphorus and potassium fertilization. Liming with ground limestone and dolomitic limestone (2000 - 6000 kg ha-1) at the start of the experiment raised soil pH from 4.4 to 5.5-6.0 thus supplying the trees sufficiently to maintain the leaf Mg and Ca within the optimal range throughout the experimental period.

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Accession: 009499150

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