Nitrogen deficiency can be detected with a chlorophyll content meter.
Nitrogen fixation | nitrogen | nitrogen oxide | nitrogen fixation | Glucose-6-phosphate dehydrogenase deficiency | Yeast assimilable nitrogen | Ribose-5-phosphate isomerase deficiency | Reactive nitrogen species | Phosphorus deficiency | Nitrogen oxide | Nitrogen deficiency | Nitrogen | Lipoprotein lipase deficiency | Iron deficiency (medicine) | Iron deficiency | Holocarboxylase synthetase deficiency | Growth hormone deficiency |