In modern agriculture, preparations qualified as biostimulants are used alongside pesticides. They influence the development of plants and enable a yield-forming effect. An important feature of these preparations is that they are safe for the environment. They can be treated as substitutes for plant protection agents, which is especially important in the era of implementation of the European Green Deal, ordering the reduction of chemicalization of agriculture. The purpose of this paper was to compare the production and economic results of five methods of plantation care in Solanum tuberosum cultivation: on the first object (control), mechanical cultivation was used, and on the second, object the herbicide Avatar 293 ZC (1.5 dm³·ha⁻¹), on object three, the herbicide Avatar 293 ZC (1.5 dm³·ha⁻¹) and the biostimulant PlonoStart (2.0 dm³·ha⁻¹), on object four, the herbicide Avatar 293 ZC (1.5 dm³·ha⁻¹) and biostimulant Aminoplant (1.5 dm³·ha⁻¹), and on object five, the herbicide Avatar 293 ZC (1.5 dm³·ha⁻¹) and biostimulant Agro-Sorb Folium (4.0 dm³·ha⁻¹). The research was conducted from 2018 to 2020 at the Agricultural Experimental Station in Zawady, central-eastern Poland. The results were analyzed, on average, for two Polish edible potato cultivars (Malaga and Oberon), and three years of study (2018–2020) were taken into consideration. The experiment was established as a two-factor experiment in three replicates on light soil in a spit-plot arrangement. A beneficial effect of herbicides and biostimulants on the yield and profitability of edible potato production was observed. An average increase of 33.2% in marketable yield was obtained. The gross margin increased by an average of 49.3%. The highest total yield, as compared to the control object, was obtained from object 5, where the herbicide Avatar 293 ZC with biostimulant Agro-Sorb Folium was applied, such as the greatest economic effect was achieved also in object no. 5. Application of this biostimulant was most beneficial.

The aim of the study was to determine the effect of mechanical and chemical treatments with the application of biostimulants on the effectiveness of weed infestation reduction and potato yielding. A three-year field research study was conducted at the Agricultural Experimental Station Zawady (52°03′ N; 22°33′ E). The field experiment was set up in a split-plot design with three replicates. The first factor was the two edible potato cultivars, and the second was five methods of mechanical and chemical treatments with biostimulants: (1) control object—mechanical weeding, (2) the herbicide Avatar 293 ZC (clomazone + metribuzin), (3) the herbicide Avatar 293 ZC and the biostimulant PlonoStart, (4) the herbicide Avatar 293 ZC and the biostimulant Aminoplant, (5) the herbicide Avatar 293 ZC and the biostimulant Agro-Sorb Folium. Before emergence, the control object was double ridging and single ridging with harrowing and double ridging after emergence. On other objects (2–5) before emergence, two ridgings were applied. The assessment of weed infestation was performed using the quantitative weight method on two dates: about 2 weeks after the application of the herbicide and biostimulants and before the potato tubers harvest. The herbicide and the herbicide with biostimulants applied to the potato crop showed a positive influence in reducing the number and fresh weight of weeds compared to mechanical-only treatments. The highest effectiveness, calculated on the basis of the number and fresh mass of weeds, was found on the fifth object. It was, on average, 70.5 and 71.6% for cultivars, respectively. Research into the use of biostimulants in potato cultivation will continue due to the pro-environmental nature of biostimulants and the importance of this crop. It is certain that the methodology of future field experiments will meet the challenges of sustainable development.

The aim of this study was to compare Fe, Zn, Mn, Al and Li contents in table potato tubers, obtained from seven potato cultivars with different flesh colour, and one cultivar characterised by light-coloured flesh. The study material consisted of potato tubers produced in a one-factor field experiment carried out at the Agricultural Experimental Station in Zawady belonging to the University of Siedlce, Poland (52°03′ N, 22°33′ E) in 2021–2023. The following cultivars were tested: Eurostar (light yellow flesh), Rote Emmalie and Herbie 26 (red flesh), Provita, Salad Blue, Blaue Annelise, Vitelotte Noire and Bora Valley (purple and blue flesh). The study showed that the genetic characteristics of the cultivars determined the nutrient content and uptake with tuber yield. Of the tested minerals which are important for human nutrition (Fe, Zn, Mn), red and purple cultivars accumulated more Fe than the light yellow-fleshed Eurostar. Zn content was the highest in red-fleshed cultivars compared with light and purple-fleshed cultivars. Mn content was the highest in the tubers of the light yellow-fleshed Eurostar and lowest in red Rote Emmalie. Fe, Zn, Mn and Al contents and uptake with tuber yield were influenced by weather conditions during the growing season.

The aim of the study was to evaluate the content and uptake of macronutrients (P, Ca, Mg, K) in Solanum tuberosum tubers and the effect of care with biostimulants from a three-year field experiment conducted at the Agricultural Experimental Station in Zawady, Poland. The experiment was set up in a split-plot arrangement with three replications. The first factor was two varieties of edible potato (Oberon and Malaga), and the second factor was five treatments with herbicide and biostimulants: (I) control facility, (II) herbicide (chlomazone + metribuzin), (III) herbicide and biostimulant PlonoStart, (IV) herbicide and biostimulant Aminoplant, (V) herbicide and biostimulant Agro-Sorb Folium. Biostimulants and herbicide increased the concentration of P, Mg, Ca, and K compared to tubers harvested from the control facility. The Oberon variety had the highest macro-nutrient uptake capacity. The application of herbicide with biostimulants increased the uptake of the mentioned mineral nutrients compared to the control variant. Climatic conditions affected the content and uptake of selected elements.