Soil fertility evaluation

• Nitrogen deficiency results in yellow or light green color in leaves
• Potassium deficiency is when older leaves severe marginal Scorch and forward curling of leaf margins
• Bronzing due to spotting and scorching of leaves(potato)
• Sulfur deficiency when the veins and petioles show a very distinct reddish color
• Magnesium deficiency when Leaves yellow between veins
• Calcium Deficiency when Death of growing point and die-back of main stem from tip
• Iron Deficiency show strong chlorosis at the base of the leaves with some green netting
• • Boron deficiency symptoms when the terminal (end)/buds growing point may die light general chlorosis
• Phosphorus deficiency when the Older leaves dull purple and necrotic spots and redish part at the tip of leaf margin
• Copper Deficiency Leaves are curled, and their petioles bend downward
• Zinc Deficiency interveinal necrosis but the main veins remain green
• Chlorine Deficiency leaves have abnormal shapes, with distinct interveinal chlorosis
• Molybdenum Deficiency mottled spotting
• Manganese Deficiency light interveinal chlorosis
• Cobalt Deficiency reduced Vitamin B12 production and lower nitrogen fixation (Hidden sign)