Fertilizer management after tomato planting: After planting, the irrigation should not be too much, in order to keep the soil moist and dry. When raining, pay attention to drainage. There should be no water in the ditch to prevent dryness and humidity, so as to reduce the occurrence of cracked fruit and top rot. Two to three days before flowering and before the first ear fruit is inflated, the water should be poured with flowering water and fruit water. The number of watering will be determined according to the actual situation. When the new leaves have water drops in the morning, it indicates that the water is sufficient, and the young leaves can be watered in the morning. Top dressing should also depend on the growth of the plant. The leaves are dark green and the leaves are curled, indicating that the fertility is sufficient. On the contrary, the leaves become thinner, the leaves become lighter, the new shoots become thinner, and the lower leaves are prematurely yellow, indicating insufficient fertility. Topdressing in case of emergency.
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