Nitrogen, especially, will need to be applied in conjunction with moisture to be of benefit. Natural fertility or applications of phosphorus and potash will help to keep root systems healthy. Healthy plants provide a more complete canopy which will reduce soil evaporation and keep the soil from drying out as quickly. Otherwise cattle tramp on, lie on and foul on too much material. If you can keep their heads all pointed in one direction and moving systematically across the field then you can greatly reduce these losses.
Smaller fields address all the principles listed at the first of the article.
You can restrict livestock from a section allowing it time to rest and to regrow. You can prevent livestock from regrazing and thus overgrazing forages. In this manner you will allow the plant to refill the root reserve system. Plants that have a larger leaf area left after grazing can rebound more quickly. It provides more area for photosynthesis and helps to maintain a larger root system.