When you let your dog outside, he probably tends to urinate in the same general area. Although this keeps the process easy and familiar for both you and your dog, the urine can have adverse effects, such as burning the grass and leaving an unmistakable smell of dog floating in the air. Lucky, there is a way you can remove the urine odour from the lawn--namely with lime.
Wait for your dog to finish going to the bathroom. It also must be a dry day outside, otherwise the lime application is not going to work properly.
Sprinkle either lime juice or lime powder on the urine spot on the grass or soil. Lime juice helps remove the odour, although it does quickly sink into the ground. Lime powder stays on the top of the grass and soil, deodorising the area for a longer time. Lime juice is found in most stores, while lime powder is usually only available in pet shops or at larger grocery stores.
Allow the lime juice or powder to sit in your soil and grass. There is no reason to remove it or wash it away.
Your dog may or may not react to the lime smell by choosing a new spot in which to urinate. In any case, when urine smell becomes noticeable again, lime juice or powder can be reapplied.