Response of Manzanillo olive transplants to different nitrogen and cobalt applications

Abstract

ABSTRACT: A pot experiment was carried on ‘Manzanillo’ olives transplants included three levels of nitrogen (N) (N<inf>1</inf>=25, N<inf>2</inf>=50 and N<inf>3</inf>=75 g N plant⁻¹ year⁻¹) and four levels of cobalt (Co) (B<inf>1</inf>=zero, B<inf>2</inf>=10, B<inf>3</inf>=20 and B<inf>4</inf>=30 ppm Co). Generally, fertilizing with 50 g N plant⁻¹ year⁻¹ gave the highest significant value than those of other treatments in all vegetative growth characters. Vegetative growth was gradually increased by increasing cobalt up to 20 ppm and 30 ppm levels. Regarding the combination between nitrogen and cobalt levels in most cases, the best treatment was N<inf>2</inf> x B<inf>3</inf>, which gave the highest values of vegetative growth characters. The combinations of nitrogen and cobalt created slightly more variable and increased effects on the macro and micronutrient contents of ‘Manzanillo’ olives transplants.