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Effect of rate and date of foliar sprays with boron and two adjuvants on coffee (Coffea arabica L.) cv. Catuai



Effect of rate and date of foliar sprays with boron and two adjuvants on coffee (Coffea arabica L.) cv. Catuai



Agronomia Costarricense 17(1): 33-39



Trials between Apr. 1989 and Jan. 1992 were carried out in a 3-year-old unshaded plantation located 1180 m a.s.l. with an average annual rainfall of 2200 mm. The B source was Solubor containing 20% B and the adjuvants used were Superior Wk (nonoxynol) and Nu Film (pinolene). Solubor was applied at 1.5 or 3.0 kg/1200 litres and the application rate was 600 litre/ha. The applications were made 2-5 times/year.

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