A: After the emergence of celery, it is in the low temperature season, and the seedlings have poor drought resistance. The water should be replenished in time, and shallow irrigation should be done to keep the soil moist. When the seedlings grow to 2~3 true leaves, the seedlings are taken and the weeds in the field are removed. When 4~5 leaves, the root system is more developed, the absorption capacity is enhanced, and the water can be properly controlled to keep the surface wet.
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In a hydroponic system, plants are placed in nutrient-enriched water. Mediums such as gravels, sand or vermiculite can also be used. Thus plants which are placed in the water absorb the nutrients very easly. When the nutrients from the water starts finishing , water is recycled or additional nutrients are added.
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