Its antonym can be something of less importance, immaterial,imdifferent,subordinate.
Paramount clearly mean something which is superior and very influential among all others regarding a particular thing or skill etc.
For eg:- Public speaking and communication skills are the paramount of his qualities.
Soil erosion can be defined as washing away of soil by the strong action of water and wind gradually but on large scale.
In other words,
Wearing away and grinding of soil to smaller particles by agents of weathering ( i.e. water or air) in such a way that it becomes loose and slowly gets carried away or declined.
It is very important to prevent soil erosion to preserve the natural resources for coming generations.There are many ways to prevent erosion of soil.
They are as follows:-
1.Most important is the planting of trees or afforestation,it is very important to plant trees as they use the minerals from top soil and use them to make food.The trees hold the soil firm with its roots making it difficult to get carried away.
2.Stop the deforestation, for every tree that is cut down we are leading earth and soil towards erosion.
3.Addition of rocks in the soil profile where plantation is done.Rocks will hold the soil together.
4.Building retaining walls to prevent the water from entering the vegetation area.
5.Place logs as a boundary around plants trees and soil which are made of fibrous material as they will absorb water.
6.If possible,use canopies or ventilated enclosed spaces around plants and fertile soils to prevent the action of strong winds from carrying away the soil.