Progress has been made in the agronomy of Rubber Dandelion. Field trials were conducted in 2014 and 2015 at ILVO (Belgium), Rusthoeve (The Netherlands) and InExCb-Kz (Kazachstan). In 2014, plantlets were planted on flat beds. Several planting densities and fertilization levels were tested in Belgium and the Netherlands. Maximum yields were obtained at the highest planting density (1.15 ton DM/ha in Belgium and 0.7 ton DM/ha in The Netherlands). Preliminary tests with mechanical harvesting were conducted (Figure 1).
In 2015, we compared planting on flat bed and ridges (Figure 2) and experimented with precision sowing with pelleted seed (Figure 3). Furthermore, higher planting densities than in 2014 were tested. Yields varied between 1.36 and 3.3 ton DM/ha in Belgium and 0.7 and 3.2 ton DM/ha in the Netherlands.
In 2015, InExCB-KZ conducted field studies with two sowing methods, the ridge sowing and the traditional, two seeding densities. The seeding density of 375 000 seeds/ha yielded 1.44 t / ha, and at a density of 250,000 seeds/ha, the yield was 1.22 t / ha. In both cases, 60 kg of active substance of nitrogen fertilizer was used.
In 2016, ILVO, Rusthoeve and InExCB-KZ will conduct further research on industrial sowing methodology of TKS. The chemical control of weed and pest control will be studied in rubber dandelion. The mechanical harvesting and storage of the roots will be explored.