Which of the following small grain crops has an exceptional tolerance to law leaves of soil copper supply?

Barley is a small grain crops that has exceptional tolerance to law leaves of soil copper supply.
Barley is a small grain crop that has exceptional tolerance to law leaves of soil copper supply. Ears of copper deficient plants are often trapped in the sheath and emerge with white tips and blind spikelets plants show dry, white and twisted tips. Young leaves wilt on their tips whereas the basal leaves remain dark green.