Answer the following:

List any two advantages and two disadvantages of using chemical fertilizers.

Advantages:

1. They are available in a usable form containing nutrients in a fixed ratio. The ratio required for a particular area of land is determined by testing the composition of the soil.

2. They are cost effective and can provide plants the nutrients as required having a balance of nitrogen, phosphorus, and potash.

Disadvantages:

1. They change the composition of the soil and as such make the soil inhabitable to the soil flora that naturally flourish.

2. They change the inherent characteristic of the soil an cause land pollution.