An NPK experiment with Sultanina grapes
1992
Orphanos, P.I. (Agricultural Res. Inst., Nicosia (Cyprus))
The soil tested 22ppm Olsen P and 700ppm exchangeable K, P and K did not influence yield. In the first six years of the experiment yield increased linearly with N (rates applied 0, 75, 150, 225 kg N/ha) but in the last two years yield was not affected by N. Because of excessively dense foliage under high N, 100-150 kg N/ha is recomended.
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