Latest In Irrigation Tech from Tevatronic

29.05.2017

May 29th 2017 - Tevatronic has developed a technological solution that makes growing crops fully autonomous from irrigation and fertilization aspects.
The system is fully capable of deciding when and how much to irrigate, and it executes the irrigation decision without human intervention.

Oleg Korol was a software engineer for the Israeli army when he decided to run Tevatronic instead. He looked at several companies before finding this technology that measures plant pressure on the soil to decide when to turn irrigation on, and water depth to decide when to turn it off. If we have autonomous cars, it just makes sense to have irrigation systems making these decisions as well, stated Mr Korol ; and so, his decision was made.

The science behind technology is supported by many years of research from Dr Isaac Klein on irrigation and nutrition of fruit trees in the Volcani Center, Agricultural Research Organization (ARO) in Israel.
The main research interests cover irrigation of fruit trees including modeling for consumptive use and deficit irrigation, irrigation methods in relation to nutrient and water use efficiency, fertigation and nutrient distribution in the soil…

Tevatronic irrigation controler can operate in several modes:

A. Tensiometer alone mode. Tensiometers can be installed at any depth, sending the data every 15 mn via the valve switch to the server for inspection. The user makes the decision when and how much to irrigate manually.
B. Automatic mode. In this mode the controller operates as a conventional irrigation computer, requiring the input of irrigation timing and volume of water and % fertilizer injection. Tensiometers can be employed as in mode “A”.
C. Automatic mode + Decision support. This mode is similar to mode “B” but the system also suggests an irrigation time to the user.
D. Autonomous mode. In this mode the system makes the irrigation decision when and how much to irrigate, based on the input by the user of the irrigation depth, the threshold tension to initiate the irrigation and % fertilizer injection. This mode requires the use of a tensiometer and the wired or wireless connection of the valve switch/remote valve controller to an electrical 12 V DC solenoid valve. The soil water tension is measured every minute for irrigation control and recorded every 15 mn. Soil matric potential values, valve opening and closing time and volume of water and fertilizer applied are uploaded to a server on the internet for graphical and data inspection. Irrigation depth calculation is based on a proprietary algorithm. In the autonomous irrigation mode monitoring and controlling soil water tension is carried out by a single tensiometer positioned at a shallow soil layer close to a dripper where a dense root system exist (depth of 15 cm and a distance of up to 15 cm from a dripper). Once tension and irrigation depth are set the systems operates autonomously without human intervention at a frequency dictated by the drying soil. The volume of water applied is a function of the evapotranspiration by the plant that integrates all existing variables and adjust the amount of water required by the irrigation frequency and the algorithm that control irrigation depth.

During the last few years, many tests have been conducted and it results in drastic reduction of water and fertilizers consumption while increasing the yield.

Connected tensiometer, Autonomous irrigation, Fertigation scheduling
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