EFFECTS OF N, P, K, AND MG ON THE GROWTH AND PRODUCTIVITY OF THE HIGHBUSH BLUEBERRY
1973 ◽
Vol 53
(1)
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pp. 161-168
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In a 6-yr field experiment with highbush blueberries (Vaccinium corymbosum L.), (NH4)2SO4 had more effect on plant characteristics than superphosphates, KCl, or MgSO4∙7H2O. Application of (NH4)2SO4 was associated with decreased yields and bush size in each of 4 yr, with decreased fruit size in 2 of 3 yr, and with increased winter injury in 2 of 4 yr. This treatment increased leaf N in each of 6 yr but decreased leaf Ca in 3 of 6 yr. Regression equations showed that leaf Ca, bush size, and winter injury were the most important variables affecting yield, whereas leaf N and bush size were the most important ones affecting fruit size.
1973 ◽
Vol 53
(3)
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pp. 571-577
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2012 ◽
Vol 58
(No. 5)
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pp. 236-241
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