Fertilizers can be:

* Organic: Derived from natural sources like animal manure, compost, or bone meal.

* Inorganic: Manufactured from mined minerals and chemicals.

Fertilizers contain essential nutrients for plant growth, usually a combination of:

* Nitrogen (N): For healthy leaf and stem growth

* Phosphorus (P): For root development and flowering

* Potassium (K): For disease resistance and overall plant health

There are also specialized fertilizers that target specific needs like:

* Micronutrients: Trace amounts of essential elements like iron, zinc, and manganese

* Slow-release fertilizers: Release nutrients gradually over time

* Foliar fertilizers: Applied directly to the leaves

Choosing the right fertilizer depends on the specific crop, soil type, and growth stage.