Chemical fertilizers can provide the best effect in a very short time. We can say that this is sort of a dope, stimulating plant growth, fruiting and flowering. Mineral fertilizers are phosphorus, nitrogen, potassium. Provide the basic needs of plants in the food macronutrients - phosphorus, nitrogen and potassium. The same fertilizer can place a full set of macro or sochetatsya other essential trace elements (boron, molybdenum, manganese, copper and so dalie) These are called complex fertilizers, their composition often varies widely depending on the dominant element.
The use of fertilizers can have negative consequences. Very high doses - more than 4 kg per sq.m. - degrade the soil, namely, its structure and will probably lead to degradation. Just fertilizers can not be fully utilized by plants. The majority of them washed out of the soil.