变黄的笑声

Upload a sweet photo to some portal and give us the link so we can look at it

Generally, yellowing of the leaves is a lack of phosphorus or potassium, I don't remember, they wrote on a gardening forum

There can be many reasons, from overfertilization to leatherjackets, mosquito larvae, incorrect pH, watering, poor soil, etc. Write more about the lawn, and maybe we can give some advice.

I managed to deal with the yellow grass by using Yara Mila Complex fertilizer

If there are larvae, the grass "leaves" the ground, i.e. you pull on a clump and the whole patch comes off (larvae gnaw at the roots, so you can see yellow spots and the grass does not hold onto the soil). I will mention right away that larvae of two beetles sit in the ground and do this: the May beetle and the bark beetle. You won't distinguish them so easily, but tansy works on one, and acetone on the other (it is better to use specialized preparations, but they are expensive). First, you need to dig the area to a depth of 30cm, then you will find out what is there, and if there is nothing, it means that there is a lack of minerals. Also important - you need to fight ants, because they breed larvae... just like aphids. So I recommend starting with checking if there are no ants and then digging a piece of soil to a depth of 30 cm with sifting to find the insects. It is also important to check if there are earthworms in the soil. If there are none - the soil is too hard and could be reclaimed or cut to loosen it. There are many methods, and with hard soil, grass grows hard and easily dries out (poor water drainage and retention). Additionally, if you have a problem with weeds - especially thistles and clover - it means that the soil is too acidic, so the grass dries and yellows. In conclusion, grass dries out for many reasons, so upload a photo.