When leaves of crop plants show brownish coloration from the tips of the mid-ribs backward, they are showing deficiency symptom of? by Sunday | Jul 11 | Agricultural Science WAEC | 0 comments A. magnesium B. zinc C. nitrogen D. copper E. phosphorus Correct Answer: Option E – phosphorus Users Also Read These:The deficiency symptom peculiar to vitamin B in…Poor growth and yellowing of leaves in plants is due…If T represents the gene for tallness while t…A groundnut plant showing stunted growth with yellow…Coloration of the eye is ______ variation?