The yellowing and subsequent casting of leaves, for instance, is a very general symptom of disease in plants, and may be induced by drought, extremes of temperature, insufficient or excessive illumination, excess of water at the roots, the action of parasitic Fungi, insects, worms, &c., or of poisonous gases, and so forth; and extreme caution is necessary in.
Yellowing is a common sign of water-logged roots, and if accompanied by wilting may be due to drought.
Beyond Valuevo the road disappeared into a yellowing forest on the horizon.
Over-transpiration in bright wintry weather, when the roots are not absorbing, often results in yellowing.
Vitamin B2 commonly causes a bright yellowing of the urine with larger intakes possibly affecting laboratory blood tests.