Nothing because natural products are the best.
Fast acting and results oriented are advantages of chemical fertilizers and pesticides.Specifically, chemical fertilizers act nutrients quickly into the soil and into the plant's roots and circulatory system. Immediate results are seen in the growth of roots and shoots and the development of flowers, fruits and seeds. The same instant gratification can be achieved when chemical pesticides are used. Chemical pesticides kill the pest in question.
Biofertilizers are for environmentalists. Chemical fertilizers get the job done faster, better and with more interesting reactions. Hint: Look at the base of the flower root three minutes after applying any chemical fertilizer, and watch it change colour.
examples of fertilizers
chemical
Primarily the reduction of the volume to be applied and the rapidity of availability to the crop. Chemical fertilizers have a much higher percentage of the nutrients per unit of material which saves the farmer both time and money in application.
Chemical fertilizers stimulate plant growth; but if the concentration is too high, they may damage roots. What precautions concerning chemical fertilizers must a gardener take?
The advantages of natural fertilizers would be that they are not made of chemicals and not harmful for the body. A disadvantage is that they smell bad and don't work as well.
The production is significantly increased.
Nitrogen :)
fertilizers
phosphorus
Advantages of Chemical Fertilizers:- We need more food to feed increased population. This is only possible through high yielding varieties of food grains and other food materials like Oilseeds, Sugar, Fruits etc. All these things need nutrition through roots - from soil. These nutritions in large quantity can only be fortified to soil through use of Chemical fertilizers. Organic - manuring is just not possible because of many limitations. Disadvantages of Chemical Fertilizers:- Excess or uncontrolled use can spoil the soil properties, Osmotic pressure, pH, Conductivity and water holding capacity. It may also affect adversely on population of microorganisms and other parameters.it can also damage water resources