How to judge whether there is a lack of nitrogen, phosphorus and potassium in agricultural planting? In actual production, simple visual methods can be used to judge whether the nutrition of greenhouse vegetables is lacking. If you are not sure, you can take some soil samples and go to the agricultural sector to measure soil fertility for targeted fertilization.
The initial leaves of nitrogen-deficient fertilizers are pale green, gradually yellowing, and the plants will change like this. Changes in nitrogen deficiency usually start with old leaves, and the whole vegetable slowly turns pale green or brown.
Phosphorus-deficient fertilizers When the growing vegetables lack phosphate fertilizer, they will show slow growth and small leaves, showing chlorotic lesions. The back of many vegetable leaves turns reddish purple, the roots are slow to develop, delaying the outcome and maturity.
Potassium deficiency When the vegetable is deficient in potassium, the symptoms are initially expressed on the old leaves. The base of the plant is grayish green and yellowish brown, and spots along the veins. The roots of the plants are stunted, the stems are slender, hard and rich in wood.
This article URL: How to judge whether there is a lack of NPK in agricultural planting
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