What are the features of fertilizing onions? 0 8

Onions grow well in areas that are well-fertilized and weed-free, with a pH level of 6.4–6.5. Lime should not be applied directly under the onions. Fresh manure is recommended for preceding crops (5–6 kg/m2). For onions, well-rotted manure or compost in the amount of 3–5 kg/m2 is suitable. Mineral fertilizers are best applied in several stages: 60% of phosphorus and potassium fertilizers should be added in the fall, while the rest should be applied before planting the bulbs and during feeding. Nitrogen fertilizers should also be applied in parts: 30% when loosening the soil before planting, and the rest as feedings.

In the fall, when digging the soil, 3–5 kg/m2 of well-rotted manure (if necessary), 10 g/m2 of superphosphate, and 12 g/m2 of potassium sulfate are added. In the spring, during soil loosening before planting the bulbs, 6 g/m2 of ammonium nitrate, 5 g/m2 of superphosphate, and 5 g/m2 of potassium sulfate are added.

To accelerate plant growth and bulb formation, it is recommended to carry out two feedings. The first is done when the leaves begin to develop, using a solution of manure slurry (1:7-8) or bird droppings (1:10-15). The fertilizer is applied in the rows in furrows to a depth of 6–8 cm and covered with soil. The second feeding (two weeks after the first) is carried out using mineral fertilizers in the following doses: 5 g/m2 of ammonium nitrate, 6 g/m2 of superphosphate, and 6 g/m2 of potassium sulfate.