How to identify nutrient deficiencies in cucumbers from the plant itself
Cucumbers need a lot of fertilizer throughout their life. Besides applying a sufficient amount of base fertilizer (including farmyard manure and chemical fertilizer), you should also apply fertilizer in stages according to the growth of the cucumbers or the soil fertility status, and apply whatever nutrient is lacking. Some vegetable growers may rely on habit, and some may rely on experience, but actually, the simplest and fairly accurate...
Cucumbers need a lot of fertilizer throughout their life. Besides applying a sufficient amount of base fertilizer (including farmyard manure and chemical fertilizer), you should also apply fertilizer in stages according to the growth of the cucumbers or the soil fertility status, and apply whatever nutrient is lacking. Some vegetable growers may rely on habit, and some may rely on experience, but actually, the simplest and fairly accurate method is to distinguish them by the morphological changes of the plant, so that you can target exactly what is missing and supplement it.
Symptoms of nitrogen deficiency: the leaves gradually become smaller and yellow from the lower leaves to the upper leaves. At first, yellowing occurs between the veins, and the veins become prominent and visible. Finally, the whole leaf turns yellow. Few fruits set, and fruit growth and development are poor.