Agriculture system of hydroponic

Most hydroponic systems contain the nutrient solution in a closed system. This helps protect it from evaporation and from discharging into the environment as does the runoff from expose, fertilized soil.

It is a technology for growing plants in nutrient solution (water and fertilizers) with or without the use of an artificial medium (e.g. sand, vermiculite, rockwool, peat moss, saw dust) to provide mechanical support. 

Unlike the soil grower, the hydroponic gardener can control two essential process; nutrient intake and oxygen intake via roots.

Hydroponics can give plants maximum levels of the exact nutrients they need. It is also highly productive, conservative of water and land and protective of the environment.

The tree major plant requirements that a hydroponic system must satisfy are:
*Provide roots with a fresh, well balanced supply of water and nutrients.
*Maintain a high level of gas exchange between nutrient solution and roots.
*Protect against root dehydration and immediate crop failure in the event of a pump failure or power outage.

Nutrition is supplied by the nutrient solution, a mixture of pure water and dissolved nutrients. When oxygen is either incorporated into the nutrient solution or drawn into the root are when the system is drained. 

Hydroponic systems are classified as active or passive systems, depending on how the nutrient solution is delivered to the root zone. An active system includes a mechanical means for re-circulating the nutrient solution, while a passive system relies on capillary action, absorption, and/or the force of gravity to replenish roots with nutrient.

Hydroponics offers a means of control over soil-borne diseases and pests, which is especially desirable in the tropics.
Agriculture system of hydroponic