A 'irrigation automation, i.e. an automated water supply are thus used professionally in horticulture enterprises, in nursery gardens, in the vegetable growing and cultivation of ornamental plant and in Freilandkulturen as well as under glass (greenhouses), with many plant cultures. Also within the public range, in looking gardens, parks, with the of noise protection barriers up to the domestic garden and balcony are automatic irrigation plants.
The mechanism must decide, whether water is needed, like much water is given and if necessary also whether liquid fertilizer is to be along-distributed. In addition sensors are combined, Zeitfunktionen and programs - co-ordinated with the respective water distribution system - in such a way that the plants grow optimally. At the same time the water consumption is to be minimized and the fertilization to the actual need of the plants to be adapted. In practice irrigation computers are used for this task. In connection with climatic computers the irrigation time can be merged finally into the climatic rule strategy, in order to prevent for example a high air humidity with possible fungal attack of the plant culture.
Beside sprinkler systems with Regnern, nozzle tubes or wide pilot procedures micro irrigation procedures become generally accepted such as dripping irrigations, spraying irrigations and Kleinstregner, which cause smaller losses of water. In closed culture systems under glass flow gutter systems, ebb-tide tide systems and dripping irrigations are preferred. Here a closed water circulation and nutrient cycle are reached, which are environmentalcareful and which makes plant culture in the best possible way controllable.
Spray plants, which are used with the Bewurzelung by Stecklingen, are steered with sensors, which release frequent short spraying impulses as "artificial sheet ". Here for example rain sensors or cords are used, which measure the electrical resistance over the water contact.
For nozzle tubes on cut flower average usually time-steered irrigation computers are in the use, which make the water pressure available over single solenoid valves successively for different patches or units.
As indirect measured variable the irradiation intensity serves the sun. By means of Sol integrators after a certain irradiation sum a casting procedure is released.
Alternatively by temperature and humidity the of air is calculated, which correlates with the water consumption of the plants well. In connection with the culture day of the plant culture by it the water consumption of the plants can be calculated.
The measurement of the soil dampness as criterion for the irrigation need is as direct measuring method recommendable, if an even water distribution is given, for example in closed culture systems or with dripping irrigations. Here switch Tensiometer or similar electronic Tensiometer are used.
For the hobby range there are also clay/tone candles, which are connected with a by a hose and supply directly automatically a planting container without further technology.
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