Effect of varied soil nitrogen on B vitamins in collards.
D006801:Humans; D009584:Nitrogen / Q000494:pharmacology*; D012987:Soil; D014675:Vegetables; D014803:Vitamin B Complex; D014804:Vitamin B Deficiency; D014815:Vitamins
D012987:Soil; D014815:Vitamins; D014803:Vitamin B Complex; D009584:Nitrogen
NITROGEN/effects; SOIL; VEGETABLES; VITAMIN B DEFICIENCY