Figure 10: Effect of different composts at two time intervals on the uptake (μg day-1) of some micronutrient in Vicia faba L. I: Control, II: olive -mill solid waste, III: wheat straw, IV: cow manure, V: wheat straw-olive-mill solid waste, VI: cow manure olive-mill solid waste and VII: cow manure-wheat straw-olive-mill solid waste.