Potato (Solanum tuberosum L.) is grown in over 160 countries. Weed competition and environmental stressors during the vegetative growth stage significantly impact crop yields. An experiment was conducted from 2012 to 2014 in Poland to assess the effect of herbicides linuron + clomazone (L+CH) and metribuzin (M) as well as herbicides mixed with biostimulants (linuron + clomazone and algae extract of Ecklonia maxima—auxins and gibberellins (L+CH+E) and metribuzin + sodium p-nitrophenolate, sodium o-nitrophenolate and sodium 5-nitroguaiacolate (M+S)) on weed infestation, marketable yield and yield components of the following three table potato cultivars: Bartek, Gawin and Honorata. In plots where potato had been treated with herbicides and herbicides mixed with biostimulants, a decline in the fresh matter of weeds was observed, ranging from 72.4% to 96.1%, which was followed by an increase in potato marketable yield (from 27.5% to 61%) and improved parameters of S. tuberosum yield components, compared with the control. Linear correlation coefficients indicated that the following characteristics: marketable yield, weight of tubers per plant and average weight per tuber were associated with weed infestation determined prior to potato harvest.

The field experiment was carried out in 2015–2017 on a family farm in Toczyski Czortki, in the Mazovia voivodeship in Poland. The experiment was set up in a split–split–plot system in three replications. The area of one plot was 30 m⁻². The studied factors were: I—two maize varieties: PR38N86 (medium late hybrid cultivar 280 FAO), P8400 (medium early hybrid cultivar 240 FAO); II—four doses of nitrogen fertilization: 1. control object—without the use of nitrogen (0 kg N·ha⁻¹), 2. nitrogen dose—80 kg N·ha⁻¹ (applied once before sowing), 3. nitrogen dose—120 kg N·ha⁻¹ (applied once before sowing), 4. nitrogen dose—160 kg N·ha⁻¹ (applied once before sowing); III—four types of biostimulants used: 1. control object—without using a biostimulant, 2. Asahi^®SL biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 0.60 dm³∙ha⁻¹, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm³∙ha⁻¹, 3. Improver^® biostimulant: I term—four-leaf phase (BBCH 14) at a dose of 1.00 dm³∙ha⁻¹, II term—eight-leaf phase (BBCH 18) at a dose of 0.60 dm³∙ha⁻¹, 4. Zeal^® biostimulant: I term—six-leaf phase (BBCH 16) at a dose of 2.00 dm³∙ha⁻¹. The aim of the study was to determine the effect of nitrogen fertilization and the use of biostimulants on the size and quality of yield of two varieties of maize grown for grain. Based on the conducted research, it was found that nitrogen doses influenced the amount of maize grain obtained. The highest yields were obtained using 120 kg N∙ha⁻¹. Nitrogen doses significantly affected the studied maize yield components. The dose of 120 kg N∙ha⁻¹ increased the number of grains in the cob, while the dose—160 kg N∙ha⁻¹ exerted the best effect on obtaining the highest values of a thousand seeds. The biostimulants used in the experiment significantly affected the mass of one thousand seeds and the number of grains in the cob. In addition, Asahi^®SL, Improver^® and Zeal^® biostimulants increased maize yield in each growing season studied.

» Articles | Agricultural Journals

Subject and purpose of work: The study presents the effects of agricultural advisory services in the eastern part of Mazovia. The effect of advisory work was the number of services provided by advisers over a three-year-long period of their work. The state institution providing advisory services for farmers in this area is the Warsaw-based Mazovian Agricultural Advisory Centre (MAAC) with a Branch Office in Siedlce. The main objective of the conducted research was to assess the performance of agricultural advisers within six counties: Siedlce, Węgrów, Garwolin, Łosice, Sokołów and Mińsk, located in the eastern part of Mazovian (pol. Mazowieckie) Province. Materials and methods: The activity of the Siedlce Branch was analysed during the years 2012-2014. Particular attention was paid to the distribution and availability of services to farmers. This study was prepared on the basis of an analysis of available internal documents from MAAC and the literature on this field. Results: Based on the performed studies, it was found that agricultural advisory services play a very important role in the adaptation of farms to changing environmental conditions. Conclusions: Nowadays, in the era of globalisation and integration farmers face new challenges, which would be difficult to meet without an efficient agricultural advisory system.

Praca przedstawia opłacalność produkcji w gospodarstwie indywidualnym. Celem badań była ocena opłacalności produkcji roślinnej na przykładzie wybranego indywidualnego gospodarstwa specjalizującego się w tej produkcji. Podstawą danych do kalkulacji i analiz były Raporty Indywidualne Gospodarstwa prowadzone w systemie rachunkowości rolniczej PL FADN w latach 2019–2021. W przeprowadzonej analizie prześledzono wartość i strukturę kosztów oraz ich podział. Policzono opłacalność produkcji poszczególnych działalności występujących w badanym gospodarstwie. Obliczone wskaźniki opłacalności dla badanego gospodarstwa osiągały z roku na rok wyższe wartości. W 2021 r. wskaźnik opłacalności liczony bez dopłat wzrósł o ponad 65 punktów procentowych w porównaniu do 2019 r. i o 74,5 punktu procentowego z uwzględnieniem dopłat. W rozpatrywanych latach najwyższe wskaźniki opłacalności odnotowano dla rzepaku ozimego i pszenicy ozimej oraz w 2021 r. dla kukurydzy na ziarno. Na podstawie przeprowadzonych kalkulacji i analiz można stwierdzić, że badane gospodarstwo prowadziło racjonalną działalność, w której dochody zwiększały się w kolejnych latach, co wpłynęło na ogólną poprawę opłacalności.