Effects of using manures on soil quality:

• The manures enrich the soil with nutrients.
• They provide a lot of organic matter (humus) to the soil and thus restores water retention capacity of sandy soils and drainage in clayey soil.
• The addition of manures reduces soil erosion.
• They provide food for soil organisms, like soil friendly bacteria and help in the increase of natural microflora.

Effects of using fertilisers on soil quality:

• By the continuous use of fertilisers, the soil becomes powdery, dry and rate of soil erosion increases.
• By the use of fertilisers, the organic matter decreases which further decreases the porosity of soil and consequently the plant roots do not get oxygen properly.
• The nature of soil changes to acidic or basic.