Review Article

Growing Use and Impacts of Chemical Fertilizers and Assessing Alternative Organic Fertilizer Sources in Ethiopia

Table 1

Essential plant nutrient classification.

Nutrients supplied by water and airNutrients supplied by the soil
NonmineralPrimary macronutrientSecondary macronutrientMicronutrients

Carbon (C)Nitrogen (N)Calcium (Ca)Zink (Zn)Iron (Fe)
Hydrogen (H)Phosphorus (P)Magnesium (Mg)Chlorine (Cl)Manganese (Mg)
Oxygen (O)Potassium (K)Sulfur (S)Boron (B)Cobalt (Co)
Molybdenum (Mo)Nickel (Ni)

Source: [32].