Krzysztof J. Jankowski

Krzysztof J. Jankowski
University of Warmia and Mazury in Olsztyn · Department of Agrotechnology and Agribusiness

Professor

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65
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Publications

Publications (65)
Article
Full-text available
Crambe (Crambe abyssinica Hochst. ex R.E. Fries) is an annual oilseed plant belonging to the family of Brassi-caceae. It is mostly cultivated for its high level of erucic acid. Crambe was field tested in Bałcyny in northeastern (NE) Poland in 2017-2019 to evaluate the effects of nitrogen (N) and sulfur (S) fertilization on the energy efficiency in...
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A two-year field experiment was conducted in Poland to determine energy efficiency (EE) in the production of winter oilseed rape (WOR) in different fertilization: (i) zero-fertilization; (ii) 158 kg N ha􀀀1, 45 kg P ha􀀀1 and 145 kg K ha􀀀1 as mineral fertilizer (NPK); (iii) 1.0 Mg ha-1 meat and bone meal (MBM), 79 kg N ha􀀀1 and 145 kg K ha􀀀1 as miner...
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Jerusalem artichoke (Helianthus tuberosus L.) is a crop with a high potential for energy generation on account of its broad range of industrial applications, high yield potential and relatively low climatic and agronomic requirements. The aim of this study was to determine the effect of different harvest strategies on the energy potential of Jerusa...
Article
Sewage sludge and digestate can be applied as fertilizers to reduce the use of mineral fertilizers and reliance on non-renewable resources in their production. A field experiment was conducted in north-eastern Poland (2016–2018) to evaluate the biomass yield and the energy efficiency ratio (EE) of Amur silvergrass [Miscanthus sacchariflorus (Maxim....
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The aim of this study was to assess the impact of the area under rapeseed cultivation on the economic performance and organization of farms. The study was conducted in 164 rapeseed farms in different Polish voivodeships. A targeted sampling procedure was used to select farms for the study. The studied population was divided into four groups dependi...
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Sewage sludge is a specific by-product of wastewater treatment and its use as fertilizer is the most rational and the cheapest strategy for managing this waste product. In this study, the production of aerial biomass, energy inputs and the energy efficiency ratio of Jerusalem artichoke (JA) fertilized with sewage sludge at rates equivalent to 100 a...
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The aim of this research was to present the changes in biomass production, especially pellets in Poland, in the context of world’s and European Union’s (EU) climate and energy policy, compared to other renewable energy sources. We also analyzed the law concerning the biomass production in the EU. Finally, we have elaborated the prognosis of the pel...
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Considering the need for reduction in insecticide use, we studied the potential for antibiosis and the potential for antixenosis in seven highly yielding winter Brassica napus L. cultivars against Myzus persicae (Sulz.). We found evidence for antixenosis, i.e., disruption in probing in non-phloem tissues and a failure in reaching sieve elements in...
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This article presents the results of a field experiment investigating the energy efficiency of grain produced by a semi-dwarf genotype of winter triticale at different levels of agricultural inputs. The energy efficiency of winter triticale grain production was evaluated in two low-input and two high-input cultivation practices that differed in the...
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The objective of this study was to determine the effects of potassium fertilization (applied to soil at 150, 250, and 350 kg K2O ha−1) and irrigation on the yield (fresh matter yield and dry matter yield of above-ground biomass and tubers) and the health status of tubers and leaves of three Jerusalem artichoke—JA (Helianthus tuberosus L.) cultivars...
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The aim of this study was to determine the effect of nitrogen (0, 40, 80, 120, 160 kg ha⁻¹) and sulfur (0, 15, 30 kg ha⁻¹) fertilization on the energy efficiency ratio of spring camelina produced in north-eastern Poland. The energy inputs in the production of camelina ranged from 5.1 (without nitrogen and sulfur fertilization) to 17.7 GJ ha⁻¹ (160...
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The aim of this study was to determine the effects of soil potassium fertilization (150, 250 and 350 kg K2O ha −1) and irrigation on the tuber quality (content of ά-tocopherol, β-carotene, essential and endogenous amino acids) of three Jerusalem artichoke (Helianthus tuberosus L.) cultivars (Topstar, Violette de Rennes, Waldspindel). Jerusalem arti...
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In recent years, social and economic goals have been preferable compared to environmental issues. However, global problems with the environment, increasing pollution, and gas heating emissions have made environmental issues a major priority. Suddenly, human beings have realized that environmental investments are needed to maintain better world cond...
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The aim of this study was to determine the effect of nitrogen (0, 30, 60, 90, 120 kg ha−1) and sulfur (0, 15, and 30 kg ha−1) fertilization on the morphometric parameters of plants, seed yield components, seed and straw yield, N fertilizer use efficiency (NFUE), and quality of crambe seeds. The experiment had a randomized complete block design, and...
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Camelina is an oilseed crop. Seeds may have an application in various industries. Sulfur applied to soil can increase the seed yield. However, there is insufficient information on the optimal dose of sulfur fertilization that provides the best physical and chemical properties of seed. The aim of this study was to determine the physical and chemical...
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This article presents the results of a three-year experiment involving a multi-criteria evaluation (productivity, economic and energy balance) of the effectiveness of nitrogen (N) and sulfur (S) fertilization in different cultivars of winter oilseed rape (open-pollinated, semi-dwarf hybrid, long-stem hybrid) grown in northeastern (NE) Poland. The y...
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The application of sewage sludge as fertilizer in the production of non-food crops is an environmentally sustainable approach to sewage sludge management. This article presents the results of a multidirectional analysis (agronomic and energy efficiency analysis) evaluating the effects of sewage sludge applied at rates equivalent to 100 and 160 kg N...
Article
Sweet sorghum (Sorghum bicolor (L.) Moench) is an energy crop with low soil requirements (high tolerance to low-quality soils) that can potentially compete with the maize (Zea mays L.) monocultures. This paper presents the results of a 6-year field experiment investigating the biomass yield and energy efficiency of sweet sorghum grown under high-in...
Article
Renewable energy sources (RES) can play a significant role in economic growth. This article examines the development of the wind energy market in the EU. The applicable regulations, directives, and legal acts are reviewed, and the State's role in the development of the renewable energy market is discussed. The analyses were carried out based on the...
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The biomass yield and energy efficiency of maize and sweet sorghum were evaluated based on the results of an 11-year experiment conducted in a large-area farm in north-eastern Poland. The demand for energy in the production of maize biomass was estimated at 24.4–25.5 GJ ha⁻¹. Energy consumption in the production of sweet sorghum biomass was 2.8 GJ...
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Crambe seeds have numerous industrial applications. Crambe seed oil contains mostly monounsaturated fatty acids. Seeds contain crude protein, amino acid, glucosinolates. They are used in human and animal nutrition. The aim of this study was to determine the physical and chemical properties of crambe seeds subjected to fertilization at 0, 15, 30 kg...
Article
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In this study, the agricultural inputs, energy requirements and costs associated with the production of semi-dwarf (PR45 D03 and Avenir) and long-stem (Visby) cultivars of winter oilseed rape were optimized in an experiment with 3 5-1 fractional factorial design. A field experiment was carried out in the Agricultural Experiment Station in Bałcyny (...
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This article presents the results of an 11-year field experiment (2008–2018) conducted in Poland to investigate the biomass yield and energy efficiency of fodder galega in high-input and low-input production technologies. The demand for energy in the production of fodder galega biomass ranged from 13.0 to 14.2 (year of plantation establishment) to...
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Modern white mustard (Sinapis alba L.) cultivars have high concentrations of erucic acid and glucosinolates. The progress in the breeding and cultivation of oilseed crops has contributed to the development of canola-quality white mustard, a variety without erucic acid and with low glucosinolate content, which was released for commercial production...
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This paper presents the results of a 3-year field experiment conducted in north-eastern (NE) Poland to determine the influence of the autumn application of foliar macronutrient and micronutrient fertilizers (control, one application in BBCH (Biologische Bundesanstalt, Bundessortenamt and Chemische Industrie) stage 16 (six leaves unfolded)), two app...
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Giant miscanthus (Miscanthus × giganteus Greef and Deuter) and Amur silver grass (Miscanthus sacchariflorus Maxim./Hack) are rhizomatous grasses with a C4 photosynthetic pathway that are widely cultivated as energy crops. For those species to be successfully used in bioenergy generation, their yields have to be maintained at a high level in the lon...
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The aim of this study was to evaluate the effect of nitrogen fertilization (0, 40, 80, 120, 160 kg N ha⁻¹) on changes in selected physical, thermal, and geometric parameters of camelina seeds. Samples 0 kg N ha⁻¹ and 40 kg N ha⁻¹ formed a homogenous group with lower values of 1,000 seed weight and differed significantly from the second homogeneous...
Article
Camelina [Camelina sativa (L.) Crantz] is an ancient and underutilized crop species with various potential applications in the food and feed industries due to the high nutritional quality of its oil and high protein content. Camelina has a short life cycle, therefore it can be included in rotation systems to promote more sustainable crop production...
Article
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Abstract The aim of this study was to develop classification models based on the texture features from the images acquired with a flatbed scanner to distinguish between the seeds of traditional (Radena) and double-low (Warta) cultivars of white mustard. Texture features were calculated in MaZda software. The classification models for RGB, Lab, and...
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Soil temporarily excluded from agricultural production is exposed to several factors which deteriorate its chemical, physical and biological properties. To preserve the productive potential of uncropped soil, it is recommended that the soil surface be turfed. In the spring of 1996, a field experiment was set up in Knopin (municipality Dobre Miasto,...
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This study compares the biomass yield and energy efficiency of Virginia fanpetals grown in two production technologies (low- and high-input) during a long-term field experiment conducted in north-eastern Poland. The analyzed crop was characterized by higher above-ground biomass yield and superior performance in the high-input relative to the low-in...
Article
biofuels in the EU. The analysis included data on the share of renewables in Gross Island energy consumption, changes of renewable energy in the years 2004e2016 and the amount of liquid biofuels. The authors of the paper used descriptive and statistical methods to describe the changes in bioenergy development in the European Union (EU). The biggest...
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The effectiveness of mineral fertilization can be improved through starter or band application. This technique reduces fertilizer doses (costs) and minimizes environmental risks. This paper presents the results of a 3-year study investigating the effects of a micro-granular starter fertilizer (MSF) applied in the seed zone on the micronutrient cont...
Article
In this paper the price volatility of land in Poland is examined during the years 1992-2016. The analysis concentrates particularly on stationarity, variation and GARCH. Differences in land price changes in particular provinces in Poland are presented and land prices in Poland are compared with other EU countries. The land market in Poland is diver...
Article
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The objective of our paper was to present factors of the efficiency of farms cultivating rapeseed. The analysis included production and economic results for rapeseed cultivation. We used tabular, graphic, and descriptive methods to measure the research results. In addition, the authors used a regression model to measure the impact of selected facto...
Article
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In a two growing seasons (2010-11 and 2011-12) field experiment carried out in temperate climate of Central Europe, the green area index, features of siliques and chemical composition of the seeds of two heterosis cultivars of winter rape, cultivated in three locations: Głubczyce, Pawłowice, and Prusy were compared. It was observed that siliques lo...
Article
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The effectiveness of mineral fertilization can be improved through starter or band application. This technique reduces fertilizer doses (costs) and minimizes environmental risks (decreased nutrient stratification, reduced nutrient emissions to surface water, groundwater and the ambience). This paper presents the results of a 3-year study investigat...
Article
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The effectiveness of starter or band application of fertilizers may improve the response to in-season fertilizer application. This technique reduces fertilizer costs and minimizes environmental risks through decreased nutrient stratification, reduced nutrient emissions to surface water, ground water, and the atmosphere. This paper presents the resu...
Article
A field experiment with the 3 5–1 fractional factorial design and five factors ( k = 5) at three levels ( s = 3) was performed in 2007–2010 at the Agricultural Experiment Station in Bałcyny, north-eastern (NE) Poland. The results of the experiment carried out under the agro-ecological conditions of NE Poland confirmed the high yield potential of co...
Article
Crop yields are determined by complex interactions between various agronomic factors. Knowledge of crop responses to various levels of agronomic inputs and their interactions is essential for developing high-yielding production technologies. Field experiments with the sk−p fractional factorial design are highly useful for selecting the optimal prod...
Article
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The aim of this study was to compare the thermal, physical, mechanical and chemical properties of white mustard (Sinapis alba L.) seeds of the traditional cultivar ‘Radena’ and the double low cultivar ‘Warta’. The selected thermal properties were determined with an analyser KD2 Pro. Cultivar ‘Warta’ was characterised by higher thermal conductivity...
Article
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Green seeds are considered undesirable impurities in rapeseed mass for edible oil production. The rapeseed maturity degree is mostly determined by visual evaluation of the embryo colour. In this study, digital image analysis (DIA) was used for characterisation of rapeseed samples harvested at different maturity stages. The seed size, surface and cr...
Article
Miscanthus × giganteus is a perennial rhizomatous grass which is used as a biofuel crop. Due to its high yields, low production costs, resistance to low temperatures, low soil requirements and, above all, high cellulose content, miscanthus can be a useful resource for ethanol production. The aim of this study was the determine the effect of two fer...
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Soil is an extremely valuable component of ecosystems. Even during a break in intensive soil cultivation planned for a few years, the set-aside land should be given the best possible protection. The biomass left on fallow fields is a priceless source of humic compounds, which entails positive influence on resources of nutrients, their mobilisation...
Article
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In this study, the seeds of open-pollinated winter rapeseed cultivars, hybrid winter rapeseed cultivars, open-pollinated spring rapeseed cultivars and hybrid spring rapeseed cultivars were investigated. The physical, optical, mechanical, geometric and image texture properties of rapeseeds were compared. Statistical models were developed based on th...
Article
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The aim of this study was to determine the effect of different systems of foliar fertilization on the yield of winter oilseed rape (Brassica napus L.), the mineral composition of post-harvest biomass and the processing suitability of seeds. In winter oilseed rape grown on boulder clay, intensified foliar fertilization increased seed yield (by 0.43-...
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This paper presents the results of a 3-year field experiment conducted on soil with moderate levels of boron (B) in north-eastern Poland to determine the influence of foliar application of B (0, 150 and 300 g ha-1) on the yield components, yield, mineral composition, nutritional value and feed value of winter oilseed rape seeds. Foliar application...
Article
This article presents the results of a 3-year field study into the yield and energy efficiency of maize, sweet sorghum, giant miscanthus, Amur silver grass, Virginia fanpetals and alfalfa with timothy grass grown in a farm in north-eastern Poland. The species with the highest dry matter yield (DMY) were the giant miscanthus (25.3 Mg ha-1 y-1) and m...
Article
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Foliar fertilizers are increasingly used in agricultural practice to maximize the yield potential of T. aestivum. Foliar fertilization can effectively reverse nutritional deficiencies (macronutrients), and it can be used as the main method for supplying plants with the required micronutrients. The objective of this study was to determine the effect...
Article
Significant progress in plant breeding and molecular genetics contributed to the development of rapeseed (Brassica napus L.) genotypes/cultivars whose biomass (mainly seeds) can be used for a variety of purposes. Those advancements are also used to modify rapeseed production technologies. In systems with many production factors, agronomic measures...
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The aim of this paper was to review 100 years of Polish studies on sulphur fertilisation and its effects on the growth and development of plants, the chemical composition and impact of sulphur compounds on the health of plants, and its fungicidal activity. In the reviewed studies sulphur deficiency generally delayed vegetative growth, caused the dy...
Article
The objective of this study was to determine the effects of five cultivation factors (sowing date, seeding rate, N fertilization, Mg fertilization, and disease control), applied at three levels of intensity, on the grain yield and 1000-grain weight of hulless spring oat (Avena sativa var. nuda L.) under variable weather conditions with the use of t...
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Najwyższy plon energii zakumulowanej w bioetanolu uzyskano z ziarna pszenżyta uprawianego w technologii wysokich plonów. Wynik był przede wszystkim pochodną wydajności jednostkowej ziarna (wyższej o 10% w stosunku do technologii średniego plonu i aż o 34% w odniesieniu do technologii najniższych plonów). Mimo to, wskaźniki sprawności energetycznej...
Article
The article presents the results of a three-year study investigating the impact of production technology on the energy efficiency of winter rapeseed produced in large-scale farms. Rapeseed biomass produced in a high-input system was characterized by the highest energy demand (30.00 GJ ha−1). The energy demand associated with medium-input and low-in...
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Brassica oilseed crops have very high sulfur requirements. The progressive decrease in the sulfur content of soil, the growing share of cruciferous vegetables in agricultural ecosystems and a significant drop in annual wet and dry deposition of sulfur have prompted a growing body of research into sulfur as a valuable fertilizer ingredient. The aim...
Article
Rapeseed [Brassica napus (L.)], white mustard [Sinapis alba (L.)], and Indian mustard [Brassica juncea (L.) Czern. et Coss] belong to the family Brassicaceae. these crop species synthesize substantial amounts of fat, protein, and glucosinolates (GLS). Brassica species can differ in their concentrations of fat, protein, and GLS in response to S fert...
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The aim of this study was to determine the effect of sulphur (S) fertilization on macronutrient concentrations in the roots, straw and oil cake of white mustard and Indian mustard. The experiment was conducted in northeastern Poland (2006–2008). The highest content of N, P, K, Mg and S was noted in the oil cake of both mustard species. Sulphur fert...
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This study presents the results of long-term semi-continuous experiments on anaerobic digestion at an HRT of 45d with ten silages: 2 annual and 4 perennial crops, and 4 mixtures of annual with perennial crops. The composition of substrates and digestates was determined with Van Soest's fractionation method. Removal of non-fiber materials ranged fro...
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This paper discusses the results of a three-year study into energy efficiency in the production of oilseed crops of the family Brassicaceae in north-eastern Poland. The energy inputs per ha of winter rapeseed were determined at 26.29 GJ, and were 1.8-fold higher (spring rapeseed, white mustard) to more than 2.3-fold higher (Indian mustard) in compa...
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The aim of this study was to determine the milling quality and flour strength of the grain of winter wheat grown in monoculture or after oil plants (winter rapeseed, spring rapeseed, white mustard and Indian mustard) in production systems characterized by varied intensity. Wheat grain harvested in three growing seasons (2006/2007, 2007/2008, 2008/2...
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Long term results of field expts. with cultivation of winter and spring rapes, white mustard, camelina and oil flax were used for evaluation of biodiesel oil prodn. economy (energy return on energy invested). The energy efficiency was in all cases lower (8.3–17.1 GJ/ha) than that of winter rape (43.1 GJ/ha).
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The purpose of this experiment was to determine the influence of the soil application of sulphur (S) on concentrations of micronutrients in the root residues, straw and oil cake of white and Indian mustard. The plant material for chemical analyses originated from a controlled field experiment conducted in experimental fields at the University of Wa...
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Sulfur application has a significant effect on the yield of oil bearing plants of the family Brassicaceae, especially when the sulfur content of soil is low. Sulfur fertilization also affects the value of plant raw materials, reflected by the concentrations of mineral and biologically active compounds in biomass. The aim of this study was to determ...
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Over the years, researchers from Polish research centres have been improving analytical methods as well as plant and soil assays, designed to diagnose demands of crops for sulphur fertilization and to assess their supply with this element. In this article, the authors look back at the last 100 years of the Polish research on sulphur, in the context...