Tomato

1. Nitrogen deficient tomato plants grow slowly.

2. Leaves are small and light green to yellowish green to pale yellow.

3. Leaves near the top will be yellow-green with purple veins.

4. Stems are thick and hard. Flower buds turn yellow and drop off.

5. Fruits may be small and pale green before ripening. Yields are reduced.

6. Nitrogen deficiency of the nutrient can be corrected by applying nitrogenous fertilizers based on soil test.

1. Maturity is delayed.

2. Plants deficient in phosphorus grow slowly.

3. Seedlings are stunted, especially during cool weather.

4. Leaves become dark green with purple interveinal tissue on the underside of the leaf.

5. Stems become slender, fibrous and hard.

6. The deficiency can be corrected by applying phosphatic fertilizers based on soil tests.

1. The deficient young tomato plants have dark green leaves with small stems and shortened internodes.

2. Plant tips have a spike like an appearance resulting from the slower development of the leaf petioles.

3. Young leaves are dark green, becoming crinkled and curled. Older leaves are chlorotic and bronzed.

4. Leaf margins become brown, and tissues break down between the veins.

5. Fruits of deficient plants are not fleshy, ripen unevenly and appear blotchy and drop off soon after repining.

6. The deficiency can be corrected by applying potassium fertilizers, based on soil tests.

1. Magnesium deficiency is first evident on lower and older leaves.

2. Leaf veins remain dark green, and areas between the veins become yellow.

3. Nitrogen deficiency intensifies the development of Mg deficiency in low Mg soils.

4. The deficiency can be corrected by spraying 0.5 per cent magnesium sulphate twice at weakly intervals.

1. Young leaves are chlorotic in iron-deficient plants.

2. Pale yellow mottling starts at the base of the leaves and spreads upward along the midrib and outward along the veins.

3. Iron deficiency is often related to soils with high pH, free CaCO3, high phosphorous and poor aeration.

4. Its deficiency can be corrected by spraying 0.25 per cent ferrous sulphate or 0.5 per cent annabhedi till the chlorotic symptoms do not appear on young leaves.

2. Necrotic interveinal areas occur in expanded and older leaves.

3. Spraying 0.25 per cent Zinc sulphate twice at weekly intervals corrects Zinc deficiency and for prevention soil application of zinc sulphate @ 50 kg/ha is recommended.

4. Single morphactin treatment significantly checked the abscission and shedding of flowers thereby increasing the number of fruits per plant.

5. The number of fruits was maximum when treated with GA3 followed by control and morphactin-treated plants. Also, comparatively higher values of pyruvic acid and glyoxylic acid were recorded with GA3 treatments.