Explain what will happen, if on a cultivated field only manures are supplied and in another field, only fertilizersre supplied, keeping all other conditions similar.
During cultivation when the manures are only applied the soil will obviously get enriched with the nutrients as well as the organic matter and there by the fertility of the soil get increased. Each crops requires specific nutrients which can be obtained only when applying fertilizers. If adequate nutrients are not obtained by the crop it will result in the decrease in the crop production. Similarly when only the fertilizers is added during crop cultivation, it will destroy the fertility of the soil there by causing harm to the micro organism which aids in the recycling of the nutrients.So it is advisable to use both the fertilizers for short term and manure for long term benefits so that it will result in the maximum yield from the crop.