- Agriculture is an essential activity for human survival.
- It provides us food, clothing, biofuel, and medicine.
- A farm can be considered as a system of production in which there are many interactions between soil-plant-atmosphere.
- Some of the inputs required in the system are water, fertilizers, and solar radiation.
- Not all the inputs are renewable, such as fertilizers. This implies that scarcer the source more expensive it is.
- Sustainability is an important issue in agriculture. To achieve a sustainable production, the production system should provide benefits for the economy, society, and environment. Wisely use of inputs in the system aids to a more sustainable agriculture.