Yellow spots in the lawn can have several causes: for example, nitrogen or iron deficiency or dog urine. Some damage patterns can be attributed to a nutrient deficiency at first glance, others are more difficult to detect or even easily confused with each other.
Iron deficiency is best recognized by the fact that the leaves remain green longer than the area on the edge of the lawn that has been burned by the sun. If the lawn grasses lose their lush green and appear pale, there is most likely too little nitrogen in the soil. The lawn also grows very slowly and needs to be mowed less frequently.