2.4.1 Law of the Minimum
The Law of the Minimum was first formulated by Carl Sprengel but popularized by Justus von Liebig (and is still often attributed to him). It is frequently illustrated by a barrel with staves of varying lengths. Its core principle states that yield is most limited by the nutrient that is in the greatest deficiency. Conversely, this also means that yield increases through fertilization of the minimum factor are only possible up to the point where the next limiting factor comes into play. The figure below illustrates this relationship.
Originally confined to nutrient elements, this statement was later extended to other growth factors (light, water, temperature,etc.

graphic
Criticisms of the "Law":
    • It suggests a linear relationship between yield and the availability of a nutrient (or growth factor).
    • It implies that equal amounts of all nutrients have the same effect on yield.