However this is a very vast and one of the most discussed topics among naturalists, I will try to make it short, simple, and easy.
Manures and fertilizers are mainly related to the fertility of the soil. In simple terms, soil fertility is the ability of the soil to provide essential nutrients to the plants. This is dependent on the available essential nutrients in the soil.
Let’s take an example for better understanding
Let’s imagine that we are growing a plant in Pune, the plant will take nutrients from the ground for its growth. It will show less vegetative growth but good health and fruiting based on the availability of nutrients in the soil without applying any extra nutrients.
All the nutrients at a particular place will start decreasing. At one point the land will become infertile and inappropriate to support plant growth. That’s why in prehistoric times people used to migrate to different places to grow their crops.
To solve this problem we started adding manures or fertilizers to the soil in a pot or in large farms.
Manures are organic and support healthy bacteria and organisms living in the soil which in return makes the soil more fertile.
In comparison, fertilizers are inorganic having a high concentration of nutrients but are mainly specific. That means fertilizer A is only rich in element A or B. But not have all the essential nutrients required by plants and also it doesn’t support the growth of healthy bacteria in the soil.
Fertilizers are targeted or have only specific components for specific requirements of the plant while manures are for the overall development of the plant.
Few people even think that we are destroying nature by using fertilizers but my opinion is different. I don’t discard this fact that the use of excess fertilizers can harm the soil health but the use of a limited amount of fertilizers with organic manures does no harm.