Explanation arable land
Each crop requires nutrients. The essential nutrients that a crop needs most are nitrogen (N), sulphur (S), phosphate (P), potassium (K), calcium (Ca), and magnesium (Mg). The other essential nutrients are the micro nutrients iron (Fe), zinc (Zn), manganese (Mn), copper (Cu), boron (B), molybdenum (Mo) and chloride (Cl). A crop requires relatively low concentrations of these micro nutrients, however a deficit can cause loss of yield and/or quality in every crop.
A number of other nutrients (sodium, silicon, cobalt, selenium) can also be important to - amongst other factors - the yield, quality, resilience, sturdiness, fertility, palatability and (animal) health.
Elements can also compete with each other. For example, if the Mg status is “good” but the K status is “high”, then an Mg deficiency can still occur. Therefore, the recommended dosages take these interactions into consideration.