Nitrogen works where you place it —not where you spill it.

CULTAN (Controlled Uptake Long Term Ammonium Nutrition) delivers nitrogen in ammonium form (NH₄⁺) directly into the root zone, using injection needles about ~8 cm long. At the injection point a local deposit forms, which the soil's sorption complex holds in place until the roots grow to it, so the plant takes up nitrogen gradually throughout the growing season. Classic saltpetre (CAN/KAS, NO₃⁻) is spread on the surface and needs rain to bring the nitrogen to the roots; along the way part of it volatilises as NH₃, and part leaches into groundwater as nitrates. CULTAN does not eliminate both phenomena entirely, but it reduces them, because the application point has no contact with air or with the upper soil layers most exposed to leaching.

Liquiliser handles all the typical mineral liquid fertilisers used in Polish agriculture: urea-ammonium nitrate solution (RSM-28, RSM-30, RSM-32), liquid multi-nutrient N-P-K fertilisers (with added micronutrients), aqueous ammonium nitrate solutions and aqueous urea solutions. Each of these forms reaches the root zone through the same injection discs, without contact with air.

No. Liquiliser is an applicator for liquid mineral fertilisers: RSM, liquid multi-nutrient fertilisers, ammonium nitrate solutions and urea. Organic material (cattle slurry, pig slurry, biogas plant digestate) requires a completely different machine design: larger hydraulic cross-sections, six-blade splitting rotors, non-return valves protecting the system from ingress of organic matter, and reinforced-wall rubber hoses. For slurry, Duport has a separate technology: All Track applicators (Farmer / HD Profi / Twin), All Track 15 m and Schleppschuh, and tankers with a progressive cavity pump. Liquiliser is not used for slurry, and vice versa.

The SW range comprises four models: SW 8032, SW 12048, SW 13554 and SW 15060, with working widths from 8 to 15 m, and tanks of 3,000, 6,000 or 8,500 l to choose from. The choice depends not only on field area but also on field geometry (long fields can be covered with a wider boom; fields with numerous turns and curves require a smaller width), on tractor power and on fertiliser logistics (a larger tank means fewer returns to the loading point, but also a greater load on the axles). We determine the specific choice in discussion with an agronomist and the RUTHENIA ALBA service team.

The needles penetrate the soil between crop rows and place the fertiliser locally; they do not cut the plant's roots or the main axis of the root system. Point punctures in the root zone are a natural element of agronomic CULTAN practice; the plant responds to a nitrogen deposit near its root system by growing root hairs towards it. In field practice the operation is neutral for the crop, provided the wheel track matches the row spacing and the working speed is within the range permitted by the manufacturer.

From the RUTHENIA ALBA warehouse. We keep in stock stainless steel needles (with tungsten carbide tips), complete injection discs, injector springs, and hydraulic and ISOBUS terminal components. The specific range of parts and delivery times are agreed once the SW model and its configuration are determined. A replacement part for an injection disc should not halt the season; this is one of the reasons we maintain a warehouse in Poland, not just an import point.