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2. Nutrient film technique - Wikipedia

   en.wikipedia.org/wiki/Nutrient_film_technique

   To prevent tipburn from taking place, provide crops with adequate air flow and circulation, decrease relative humidity, and decrease the temperature in your growing environment, and you may need to lower your DLI. For proper nutrient uptake, maintain a fertigation pH level of 5.4.-5.8 and an electrical conductivity level between 1.7 and 2.5.

3. Kratky method - Wikipedia

   en.wikipedia.org/wiki/Kratky_method

   The Kratky method is a passive hydroponic technique for growing plants suspended above a reservoir of nutrient-rich water. [1] Because it is a non-circulating technique, no additional inputs of water or nutrients are needed after the original application, and no electricity, pumps, or water and oxygen circulation systems are required. [2]

4. Hydroponics - Wikipedia

   en.wikipedia.org/wiki/Hydroponics

   Under controlled laboratory conditions hydroponic solutions are periodically pH adjusted to near neutral (pH 6.0) and are aerated with oxygen. Also, water levels must be refilled to account for transpiration losses and nutrient solutions require re-fortification to correct the nutrient imbalances that occur as plants grow and deplete nutrient ...

5. Deep water culture - Wikipedia

   en.wikipedia.org/wiki/Deep_water_culture

   Lettuce, for example, grows best in a pH of 5.6–6.0, EC of 1.1–1.4 dS·m −1, 17 mol·m −2 ·d −1 daily light integral which may consist of a combination of natural and supplemental lighting, air temperature of 24 °C day/19 °C night, water temperature of 25 °C, and dissolved oxygen of >7 mg·L −3.

6. Hydroponic dosers - Wikipedia

   en.wikipedia.org/wiki/Hydroponic_dosers

   When growing in hydroponics, the pH of the nutrient solution often drifts off target during use. The same is said for the amount of nutrients in the solution. These devices will automatically measure and adjust the solution as needed. By keeping TDS and pH levels in-range, plants grow efficiently, without health problems. Hydroponic dosers are ...

7. Aquaponics - Wikipedia

   en.wikipedia.org/wiki/Aquaponics

   Aquaponics is a food production system that couples aquaculture (raising aquatic animals such as fish, crayfish, snails or prawns in tanks) with hydroponics (cultivating plants in water) whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.