According to the ecological law of the minimum, the successful vital activity of the body is limited by the environmental factor, the quantity and quality of which are close to the minimum required by the body.
If there is enough nitrogen, phosphorus and other minerals in the soil, but not enough potassium, the plant will develop only until it has absorbed all the potassium.
Factors that restrain the development of organisms due to a shortage or excess in comparison with needs are called limiting.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.