The choice of the place to get the onion right should be rigorous. He doesn't want to see water either in the air or on earth. He is a ferocious fan of the drink, so he puts it in full sun so that nothing around him will last for the shade. He doesn't like the flooded land either. If you have clay or slow soil, don't worry about putting your onion on, it's best to go to the cooperative and go home with the onion. He loves the proud land and the water easily escapes. If you have the least fear of water or any doubt with the earth, raise the furrows, the long peaks, and plant them on the sides and on the same summit. If you do these stretch marks better in the north-south direction, so the sun on your daily walk will dry you both sides.
On the other hand, the onion hates the acidic soil. This is solved by dancing the lime: ground limestone, dolomite, ash, alive lime or dead lime. I like the raw lime and the ash. Lime increases the swelling of the ground. On the contrary, ash will also provide other good food for the plant, such as potassium, etc. You decide.
Now do not start applying the fertilizer, place it on one of the previously paid plots. Well done fertilizer affects you. For the next one, the item that will be for the onion can be paid in autumn with the manure or the oldest mud, it is given lime at the beginning of the winter and leaves the land in peace. The onion does not like to plant in soiled soil, it wants settled soil, like the people of cabbage (Brassica spp).
If you have to buy onions, I was taught by a Pakistani friend: to eat raw onions, they choose the most sweet and white onions, they have no pain either in the palate or in the eyes. They're delicious.