Irrigation and Fertilization Principles
| Soil Type | SP Value | Irrigation regime* | Irrigation Threshold Cbar** | Fertilization |
| Heavy | >50 | Large intervals and small volume. Large volume requires longer irrigation period. | 25 – 40 | Quantitative is a common practice, but also proportional when reduced dosage is in use. |
| Medium | 35 – 50 | Medium-short intervals with small volume. Water volume can be increased according to plant needs. | 20 – 25 | Proportional or quantitative with medium dosage |
| Light | 35 > | Short intervals with small amount of water. Pulse irrigation is optional, according to plant needs. | 15 – 20 | Proportional with increased dosage |
*It is recommended to irrigate in large volumes (approximately 200-400 m3/ha, according to the soil type) once or twice during the growing season in order to flush excessive amounts of nutrients and chemicals and refresh the root zone.
** It is advised to use tensiometers in several locations of the plot in order to decide upon optimal irrigation timing.
Vardit Dripline
The Vardit dripline is recommended for greenhouse crops grown on soil. Its dripper is equipped with a large inlet filter which can be used with low-quality water. The Vardit’s unique pressure compensation mechanism ensures excellent performance in changing topography and long plots. The dripline is available in flow rates of 0.85 / 1.2 / 1.6 / 2.1 / 3.4 l/h, in keeping with the growing trend of low water volumes for efficient, accurate and economical drip irrigation.
Click here to view the VARDIT dripper product sheet
Greenhouse Crops Grown on Soilless Substrate
Growing crops on soilless substrate presents the grower with a bigger challenge in terms of irrigation frequency and fertilization precision. Media control plays a crucial role in soilless culture and can significantly affect both plant health and development. During the growing period, the farmer should make sure that the soilless media, organic or inorganic, provides an optimal environment for the root zone.
Inbar Dripline
The Inbar dripline was designed specifically for precision and pulse irrigation. Featuring a unique pressure compensation mechanism and an efficient inlet filter, the dripper also includes two other important features: non-drain and anti-siphon mechanisms. The non-drain feature keeps the pipe full of water between irrigation pulses, enabling immediate and precise water discharge along the dripline. The anti-siphon mechanism prevents soil and dirt particles from being drawn into the dripper through the outlet hole.
Click here to view the Inbar Dripper product sheet
