Responsible for the head of the Department of Potato Genetic Resources of the All-Russian Institute of Plant Genetic Resources N. I. Vavilova, Doctor of Biological Sciences Stepan Kira:
- It depends on many factors, primarily on the moisture reserves in the soil. In the northern regions of our country, they are watered only in the dry years, which are almost never there. But in most cases, watering is needed (including in the Chelyabinsk region). They are carried out only if there was no rain, and not earlier than a month after planting. The fact is that in the first few weeks the plant eats from a tuber (nature did not in vain invented this method of propagation for potatoes). But if buds have already appeared on the bushes, and the soil is dry at a depth of 12-15 cm from the surface, then it is time to water it - during the flowering period, the roots of this crop consume moisture intensively.
Moreover, the surface moistening, which is practiced by some gardeners (watering from a hose for 10-15 minutes), is not enough! It is necessary to thoroughly saturate the soil with water to a depth of 20 cm, so water is fed into the furrows or through sprinklers. If after this there is no precipitation, then watering can be repeated with an interval of 10 days, but no more than 2 times.
It should be remembered that potatoes do not tolerate excessive moisture. Its roots must breathe all the time - for this they need loose soil. But diseases (especially all unloved late blight) are very fond of wet soil. After flowering, during yellowing of the tops and about 3 weeks before harvesting, you no longer need to water the potatoes.
Is it true that the more ash you make when planting potatoes, the richer the harvest will be?
“Although the ash contains the potassium necessary for plants, it will not be able to fully feed the potatoes - in any case, planting requires mineral fertilizers. In addition, ash retains moisture, and its abundance in the hole can create conditions for potato diseases. A tablespoon per well is usually sufficient. You can not lay the tuber directly on the ash - it must be dusted with a thin layer of earth. If there’s little “fertilizer from the stove”, then it’s better to simply dust the sprouted tubers right on the day of planting.
A source: http://www.aif.ru