Struvite is regarded as a promising phosphorus (P) fertilizer compared to commercial pristine mineral phosphorus fertilizers. The aim of this study was to determine the effect of Phosgreen fertilizer, with struvite as its phosphorus source, on the chlorophyll, potassium (K), and calcium (Ca) contents in lettuce grown in peat compared to superphosphate. The study was carried out as a pot experiment with different doses of P fertilization. The study presents the chlorophyll a, b, total (a + b) chlorophyll, and carotenoid contents of the lettuce plants. Significant differences in the chlorophyll a and b contents were observed between the different phosphorus applications, and this can have a direct impact on the crop yields. Significantly higher contents of both chlorophyll contents were observed under Phosgreen fertilization as well as the chlorophyll a + b content *. The results of the study on lettuce indicate a dependence of vitamin C content on phosphorus fertilizer, but with no significant increase under Phosgreen fertilization; the contents of K and Ca were not significantly dependent on the type of phosphorus fertilizer. Due to the favorable composition of Phosgreen, it may be recommended for use as a phosphorus fertilizer in the agriculture and horticulture sectors.

Faba beans (Vicia faba L.) are a high-protein legume crop that can be widely cultivated in most climates in Europe. The amino acid composition of the faba bean protein is also beneficial for monogastric animals since it contains a great deal of lysine, an amino acid that is deficient in cereals. Two genotypes of faba beans were cultivated at three sowing densities (45, 60 and 75 seeds per m²) during three growing seasons (years 2013–2015). The aim of the research was to assess accumulation of nutrients (N, P, K, Ca and Mg) of two faba beans in seeds and straw under different sowing densities. A field experiment was conducted in 2013–2015 at fields of Wroclaw University of Environmental and Life Sciences in southwestern Poland from which plant material was used for chemical analysis in terms of determining the accumulation of the following elements—N, P, Mg, K and Ca—in the seeds and straw. The results showed that the genotypes of the faba bean varied greatly in accumulation of nutrients in various sowing densities and in following years of research. However, the average accumulation of nitrogen, calcium and magnesium in seeds for three years (2013–2015) was significantly higher in the Bobas cultivar under 60 seeds per m² as well as in both tested cultivars using 75 seeds per m². Accumulation of potassium and phosphorus in seeds was highest in both analyzed cultivars using 60 and 75 seeds per m² (average for 2013–2015). Considering accumulation of elements in the straw of faba bean, it is shown that the concentration of potassium and calcium was the highest in both tested cultivars under the effect of sowing density at 60 and 75 seeds per m² while the concentration of nitrogen, phosphorus and magnesium did not differ significantly as an effect of the interaction of cultivar and sowing date (average for 2013–2015). Weather conditions played an important role in accumulation of nutrients of both faba bean genotypes in the years of research (2013–2015).

Soybean is the crop of the future, especially for countries with a high demand for food and feed protein. Therefore, soybean cultivation is moving north to countries at higher latitudes, where temperatures, photoperiodism, and rainfall distribution are not always able to meet soybean requirements. The aim of this study was to evaluate three sowing dates as a factor influencing soybean cultivars yield and seed chemical composition in agroclimatic conditions of south-western Poland. In the years 2016–2019, a field experiment was conducted in Lower Silesia region, near Wroclaw, with three sowing dates: early (mid-April), 10-day delayed (at the turn of April and May), and 20-day delayed (first half of May), and two soybean cultivars: Merlin and Lissabon. In this location, soybean sowing is recommended in mid-April, possibly at the turn of April and May. The cultivars tested differed in yield and yield component values in the years of research, but generally, the Lissabon was better suited to local conditions. Results were discussed with findings of other domestic research, to investigate the problem of the soybean sowing date in Poland. The recommended sowing date for soybean was found to vary from region to region. These differences are due to the length of the growing season in each location and the varied adaptation of cultivars to the local climatic conditions.

Three-year (2007–2009) experiment with white mustard (Sinapis alba L.) was conducted in the fields of Wrocław University of Environmental and Life Sciences. The experiment was conducted in a split-plot design with two variable factors. White mustard cultivars (Metex, Nakielska) were the first order factor and differentiate sulfur doses (0, 10, 20, 30 kg S per 1 ha) were the second order factor. The aim of the study was to estimate a correlation between the health status of collected white mustard seeds and various doses of sulfur fertilization. In conclusion, the species and types of fungi isolated from white mustard seeds were located mainly on the surface of seeds. An increased sulfur fertilization did not affect an occurrence of fungal pathogens either on disinfected or non-disinfected white mustard seeds. Nasiona gorczycy białej (Sinapis alba L.) pozyskano z doświadczenia ścisłego prowadzonego w latach 2007–2009 na polach Uniwersytetu Przyrodniczego we Wrocławiu. Badania analizowano w układzie split-plot na dwa czynniki zmienne. Czynnikiem I rzędu były odmiany gorczycy białej (Metex, Nakielska), a czynnikiem II rzędu zróżnicowane dawki siarki (0, 10, 20, 30 kg S na 1 ha). Celem badań była ocena zdrowotności zebranych nasion gorczycy białej odmian Metex i Nakielska w zależności od zróżnicowanego nawożenia siarką. Podsumowując wyniki izolacji mikroorganizmów z nasion gorczycy białej zaobserwowano, że gatunki i rodzaje grzybów z nich wyosobnianych zasiedlały głównie powierzchnię nasion. Zarówno w odniesieniu do nieodkażonych, jak i odkażonych powierzchniowo nasion gorczycy białej, nie potwierdzono korzystnego wpływu zwiększonego nawożenia siarką na ograniczenie występowania patogenów grzybowych.