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- Title
HYDROPONICS IN PRECISION AGRICULTURE - A REVIEW.
- Authors
IKRANG, Elijah G.; EHIOMOGUE, Precious O.; UDOUMOH, Unwana I.
- Abstract
This review paper present hydroponics in precision agriculture. Hydroponics is a techniques for growing plants in nutrients solutions without soil, but only with water or nutrient rich solution in greenhouse under controlled environment within a short period of time. Among various hydroponic systems, the deep flow technique (DFT), nutrient film technique (NFT), and aeroponic systems have been commercially used with recirculated nutrient solutions. Since ion concentrations in the nutrient solutions change with time causing a nutrient imbalance, nutrient control systems with real-time measurements of all nutrients are required, but such systems are not yet available on a commercial basis. Instead, ion electrical conductivity-based hydroponic systems have been the second-best choice but suffer from nutrient imbalance. To improve the nutrient balance, periodical analysis of nutrient solutions and adjustment of nutrient ratios need to be conducted. As an advanced method, the ion-selective electrodes and artificial neural networks have been used to estimate the concentration of each ion. To protect the plants in plant factories from disease, disinfection systems, such as ultraviolet (UV) systems, are required. Root-zone environmental factors such as nutrient concentration, pH, dissolved oxygen, and temperature directly affect the growth of hydroponically grown plants. For real-time measurement of these factors, corresponding sensors are required. By assuming that the electric current increases with an increase of ionized nutrients in the nutrient solutions, electrical conductivity (EC) sensors are used to measure nutrient concentrations.
- Subjects
HYDROPONICS; PRECISION farming; ELECTRIC currents; SOIL solutions; ELECTRIC conductivity; PLANT nutrients
- Publication
Annals of the Faculty of Engineering Hunedoara - International Journal of Engineering, 2022, Issue 2, p143
- ISSN
1584-2665
- Publication type
Article