The empirical formula is the formula that indicates the relative proportions of the elements in a molecule rather than the actual number of atoms of the elements. It tells us the simplest ratio of elements in a given compound.
Molecular formula on the other hand tells us the actual number of atoms of each element a compound or a molecules has. Molecular formula is calculated from the empirical formula and the molecular mass of a compound.
In canal irrigation its not easy to control flow of water. ... in drip irrigation method pipe system is applied in fields and pipes have holes. these holes are directed perpendicularly to plants root.