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Background: Broccoli (Brassica oleracea var. italica) is a very popular vegetable species that is characterized by a specific taste and high nutritional value. The flower is used for food, although the other green parts of this plant are also edible. In Serbia, broccoli is produced throughout the year, except for winter. Due to the relatively short growing season, it is a good pre-crop, as well as a subsequent crop. During production, the utilization of applied nutrients is questionable, and therefore their effect on production. Materials and Methods: During these studies, the influence of micro granulated starter fertilizer (Super Start NP 10:35 +2% MgO + 5% S +2% Zn, Elixir Zorka, Serbia) on the production characteristics of broccoli was investigated, with the aim of finding the optimal dose its applications. Fertilizer was added to the soil along both sides of the planted plants at a distance of about 10 cm from the roots. In addition to the control in which no starter fertilizer was applied, there were 5 more treatments with doses from 15 to 35 kg/ha. Broccoli variety Parthenon F1 (Sakata Seed) was grown at a density of 28,800 plants/ha. Other agro technical measures were standard (watering, protection). Results: Inflorescences were harvested at technological maturity when they reached the appropriate size. The measured values for the width, height and mass of the inflorescence were significantly higher in the varieties with the highest doses of starter fertilizer. The yield behaved in the same way. The width of the inflorescence ranged from 16.37 to 20.63 cm, the height from 12.52 to 14.79 cm, the mass of the inflorescence from 448.7 to 661.4 g, while the yield had values from 10.68 to 15.74 t/ha. Conclusion: For all examined parameters, the values obtained at the highest doses of starting fertilization (30 and 35 kg/ha) did not differ statistically significantly. Based on this, it can be concluded that the dose of applied starter fertilizer of 30 kg/ha is opti

Fertilizers with controlled release (CRF) are materials that have nutrients for the plant and can be dissolved after a certain time from the moment they are introduced into the soil. They are available to the plant much longer than conventional fertilizers. Phosphate glasses (PG) are quite interesting for controlled release systems due to their low chemical durability. Although pure PG have highly hygroscopic nature, their chemical durability can be compositionally controlled [1,2]. Biochar is the product of biomass pyrolysis, a process where organic substances are broken down at temperatures ranging from 350 °C to 900 °C in a reduced oxygen thermal process. Biochar applications have an effect on soil improvement, waste management, climate change mitigation and energy, and consequently might have social and economic benefits. Biochar improves soil physiology and increases productivity, assisting with crop residue management [3,4]. This paper presents the results of testing the effect of PG and biochar from plum stones (PSB) on rose plantings (sort Lavaglut). The control sample were rose plantings without fertilizer addition. The phosphate glass (45.4P2O5•25.6K2O•14.5CaO•3.1SiO2•9.3MgO•1.2ZnO•0.9MnO2) was prepared from reagent grade raw materials. The glass mixture was melted at T = 1230 °C for t = 1h in an open porcelaine crucible in an electric furnace and the melt was quenched on a steel plate. Phosphate glass and biochar were added in a variety of dosages. The application of 1 g of phosphate glass and the application of 10 g of PSB had the greatest effect on increasing the average height of plants. The application of PG and biochar had no significant effect on the average number of formed branches in the crown, as well as on the average number of newly formed branches. Higher doses of PG (3 g) and PSB (10 g) have a favorable effect on increasing the average number of formed flowers. The chemical analysis of the plant material at the end of the vegetative cycle de