Nitrogen deficiency
photos/corn-N1.jpgNitrogen deficiency in corn:Yellowing proceeds down the midrib of older leaves.
Phosphorus deficiency
photos/corn-P1.jpgPhoshorus deficiency in corn: leaves are dark green, lower leaves even beome reddish purple.
Potassium deficiency
photos/Banana-K1.jpgPotassium deficiency in banana: older leaves become chlorotic, then necrotic, and the tip of the midrib bends downward.
Calcium deficiency
photos/corn-Ca1.jpgCalcium deficiency in corn: new leaves fail to unfurl, growing point dies.
Magnesium deficiency
photos/corn-Mg1.jpgMagnesium deficiency in corn: interveinal chlorosis of older leaves.
Sulfur deficiency
photos/banana-S1.jpgSulfur deficiency in banana: young leaves are uniformly chlorotic.
Iron deficiency
photos/Soy-Fe1.jpgIron deficiency in soybean: young leaves have interveinal chlorosis due to reduced chlorophylls.
Boron deficiency
photos/Papaya-B1.jpgBoron deficiency in papaya: fruits are malformed, develop bumps.
Zinc deficiency
photos/Avocado-Zn.jpgZinc deficiency in avocado:Young leaves have interveinal chlorosis; internodes shorten and have a rosette look.
Manganese toxicity
photos/Soy-Mntox.jpgManganese toxicity in soybean:Growth is stunted; leaves have necrotic spots and curl upward (left picture).
Aluminum toxicity
photos/Al-toxic.jpgAluminum toxicity in roots:High Al affects roots first; primary roots are stunted, shortened and have a stubby appearance (right picture, Lime 0).
