Which of the following crops cannot be easily improved by cross-breeding? by Sunday | Jul 9 | Agricultural Science WAEC | 0 comments A. groundnut B. cowpea C. oil palm D. maize E. yam Correct Answer: Option E – yam Users Also Read These:The property of soil which cannot easily be changed…Which of the following soil properties cannot be…The ways by which a pasture can be improved include…In crop rotation, deep-rooted crops should follow…A rock in which water cannot easily pass through is termed?