Question

explain the role of different constituents of soil in plant growth

Answer 1

By soil getting full of nutrients like potassium phosphorus and nitrogen Nitrogen helps raise leaves and flowers and Phosphorus help in growth

Answer 2

nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), sulfur (S), magnesium (Mg), carbon (C), oxygen(O), hydrogen (H)
the micronutrients (or trace minerals): iron (Fe), boron (B), chlorine (Cl), manganese (Mn), zinc (Zn), copper (Cu), molybdenum (Mo), nickel (Ni)
These elements stay beneath soil as salt.