Rotted manure and mineral fertilizers are used for Potato plant.
Under the early potato manure is put in the fall, under the winter potato – at preparation of lot for planting the tubers. Phosphate fertilizers are used in the fall when lot is digging, potash fertilizers - in the fall and spring, and nitrogen fertilizers - in the spring. It is necessary to avoid the use of potassium chloride. The fact that the chlorine, which is in the composition of this fertilizer, has a harmful effect on potato plants, so where possible, be replaced the potassium chloride by fertilizer without chlorine forms, such as potassium sulfate. This increases the starch of tubers, and hence the nutritional value of potatoes. Early potatoes are usually fed once with ammonium nitrate after shoots appear: 0.8-1kg of fertilizer per 100m2. For accelerate maturation and improve the yield and starch content in tubers of potato, some growers are used foliar application of aqueous extract of phosphorus fertilizer once or twice during the ripening of the potato, but for 20-30 days before harvest. 1kg of superphosphate infusion (on 10-20liters of water) is used per 100m2.
If the site annually fertilized with manure, lush greens growing, but little is tuber, it necessary to stop the manure. In the spring should be dug as deeply as possible. If, however, will grow lush, dark greens, it is necessary to feed the plant with potassium sulfate and superphosphate (2kg per 100m2).
