Shortage of greenhouse vegetables can be measured

The first leaves of nitrogen deficiency are light green and gradually yellow, and the plant will also have such changes. Changes in nitrogen deficiency usually begin with the old leaves, and slowly the whole vegetable becomes light green or brown.

Phosphorus-deficient fertilizer When the growing vegetable lacks phosphate fertilizer, it will show slow growth, small leaves and chlorotic spots. The back of many vegetable leaves turns red-purple, and fibrous root growth is delayed, resulting in delayed results and maturation.

Potassium deficiency When the vegetables lack potassium fertilizer, symptoms are initially expressed on the old leaves. The base of the plant is grayish green and yellow-brown, showing spots along the veins. The roots of the plants are stunted, the stems are slender, hardened and rich in wood.

These simple visual methods can be used to determine whether the nutrition of greenhouse vegetables is lacking. If you are not sure, you can take some soil samples and go to the agricultural department to measure the soil fertility for targeted fertilization.

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