Leaves turn yellow and curl upward. Tips of leaves fail to expand.
Boron deficiency resembles calcium deficiency.
Too much boron resembles boron deficiency because both interfere with calcium uptake. Both too much and too little boron show similar signs and resemble calcium deficiency. Boron deficiency can occur in sandy media and humid areas or alkaline soils. This can happen in saline waters. Boron needs in plants Boron may be required for carbohydrate transport in phloem.