Every plant needs water. Even those that thrive in the desert. Mahtab Rasheed has highlighted 3 main points for irrigation,
- Critical time for irrigation.
- Amount of water to be given to the plants.
- Frequency of irrigation.
For brevity, I have broken these points into two main points: Frequency of irrigation and Amount of water to supply. Water is vital to the growth of the plants in that it is a vehicle to provide nutrients to the plant and it is a critical component involved in photosynthesis. So every plant must have its regular cycle of water supplied to its roots. I believe the best water that plants can get is rain water. Nonetheless, rain does not have a regular pattern and cannot be relied upon for farming. There are some plants that can rely solely on the rain. Plants like this are the more resilient types.
Not all plants will thrive in the abundance of water. So the water being supplied to the plants must be managed. For example, Aloe Vera need not have water up to 4 weeks. Too much water too frequently will stunt the growth of Aloe Vera. Aloe Vera thrives with very little water and lots of sunlight.
On the other hand, plants like lettuce require a lot of water and thrives in a river like environment. For this reason, the plant does well in aquaponics system.
It is important for the farmer to understand that water must be provided to the root of his plants than anywhere else. So water sprinkled on top of the plant is best supplied in underwater pipes that will quickly bring water to the roots of the plant.

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