A ... is a substance that increases the fertility of the soil.
Fertilizer
Salt
Fertility
Fertilization
The best phosphatic fertilizer is:
Elements needed by plants only in trace amounts include:
Advantages of natural fertilizers (manure) over chemical fertilizers are:
All are correct
Manure is not easily leached i.e. not easily washed out of the soil to streams and rivers. Chemical fertilizers are easily washed by rain water into streams, rivers and lakes causing water pollution
Manure does not affect the PH of the soil like some chemical fertilizers do especially when applied in excess
Manure is cheap and readily available, unlike chemical fertilizers which are relatively expensive and scarce
The fertilizer 20:10:10 represents:
