the organic manure is considered better than fertilizers ,why?
Answers
Manures r partially decomposed organic material of biological origin added to the soil to Increase fertility of soil . they cause no harm to soil .
fertilizers r commercially produced synthetic chemical substances added to soil to overcome the deficiency of mineral nutrient to maintain fertility of soil. chemical fertizers enhance the crop yield on one hand and cause environmental hazard . and they destroy fertility of soil..
Fertilizers give short term benefits where as manures give long term benefits therefore we must consider the use of manure for long term benefit.
Because :
Fertiliser
Fertilisers are commercially available plant nutrients. They can be organic or inorganic in nature. They ensure healthy growth and development of plants by providing them with nitrogen, phosphorus, potassium, etc. The addition of fertilisers to the soil requires special guidelines such as dose time, post addition precautions, etc., to be followed. A fertiliser does not provide any humus to the soil. Its excessive use causes water pollution. It cannot replenish organic matter of soil.
Manures
Manure is a natural substance prepared by the decomposition of animal excreta and plant wastes. Manure is known to have a large quantity of organic materials and very little amount of plant nutrients. They help in enriching the soil with organic matter and nutrients. The addition of manure does not require any special guidelines. Manure provides humus to the soil and increases soil fertility. It protects the environment and helps in recycling farm waste.