When leaves of crop plants show brownish coloration from the tips of the mid-ribs backward, they are showing deficiency symptom of? By: Sunday|Published on: Jul 11|Categories: Agricultural Science WAEC| 0 comments A. magnesium B. zinc C. nitrogen D. copper E. phosphorus Correct Answer: Option E – phosphorus Users Also Read These:Â In crop plants, high temperatures may cause?A very poor growth in plants and discolouration of…The deficiency symptom peculiar to vitamin B in…Nitrogen deficiency in plants can lead to the…A groundnut plant showing stunted growth with yellow…SEE ALSO Which of the following feedstuffs does not contain phosphorous?