Vladimir Ivezić

• PhD
• Faculty of Agrobiotechnical Sciences, University of Osijek

The challenge of today’s agriculture is to maintain stable production and at the same time improve soil conditions. Appropriate crop management can contribute to the increase of yields, nutritional status of plants, and below-ground biomass which consequently increases soil organic carbon (SOC). One promising approach to increase yield and reduce t...

Since plant’s edible parts are one of the most important sources of nutrition, agronomic biofortification plays a huge role in overcoming mineral deficiency worldwide. The field-based research trial was set up in 2 years (2020 and 2021) with seven different treatments of foliar Zn and Se biofortification: 1. control (without Se or Zn solutions); 2....

The importance of soil fertility and its elasticity is increasingly highlighted in view of the significant limitations of crop cultivation due to climate change and soil degradation. Unfortunately, in the last few years in the Republic of Croatia, the share of acidic arable soils and soils with a low content of SOM and plant-available phosphorus is...

Selenium (Se) is a nonmetal that is essential for humans and other animals, and is considered beneficial for plants. The bioavailability of Se strongly influences its content in the food chain. Soils are the main source of Se, and their Se content primarily influences its availability, along with other soil properties. A field survey was conducted...

The incorporation of trees on traditional agricultural land has the potential for providing beneficial conditions for understory crops by altering the microclimate. Under these assumptions, we conducted a study on maize productivity intercropped in a 14-year-old walnut orchard by measuring growth and yield parameters, and water and nutrient uptake....

Climate changes have a significant impact on the most important aspects of agricultural production: ecosystem fertility, yield, production costs and revenues. The elasticity of the agroecosystem, as the ability to neutralize stressful conditions, significantly corelate the content of organic matter in the soil, which coul be increased by fertilizat...

Intercropping arable crops between tree rows has proven to be a great alternative to conventional agriculture in terms of food production sustainability and climate change adaptation. However, close interactions between species in these systems sometimes yield adverse allelopathic effects. In this study, the possibility of intercropping barley and...

Intercropping arable crops in orchards is a sustainable land use for intensifying agricultural production, under the condition of plants’ complementarity in sharing resources. This study investigated the aspects of water use and yields in intercropped systems of walnut and crops. To assess possible temporal complementarity between crops and trees,...

Population growth and an increasing demand for food cause the intensification of agriculture leading to soil degradation and a decrease in the soil organic carbon (SOC) stock. Agroforestry systems such as alley cropping are gaining more and more attention as a practice to maintain and/or increase SOC in agroecosystems. The aim of this study was to...

The aim of the study was to determine the influence of the origin of the substrate on the possibility of growing spinach seedlings, on the zinc content of spinach seedlings, and how the additional introduction of zinc solution into different substrates affects the translocation of zinc into spinach seedlings. Seedlings grown in the control-Organic...

In this study, we evaluated the leaf antioxidative responses of three wheat varieties (Srpanjka, Divana, and Simonida) treated with two different forms of zinc (Zn), Zn-sulfate and Zn-EDTA, in concentrations commonly used in agronomic biofortification. Zn concentration was significantly higher in the flag leaves of all three wheat varieties treated...

Acid soils with pH values below 5.5 have a negative effect on agricultural production. For this reason, liming is applied as a measure to raise the soil pH to the optimum (pH = 6-7). The aim of our research was to evaluate and compare the effectiveness of four liming materials (wood ash from biomass powerplant, filter dust from cement factory, blas...

The aim of research was to determine the productivity of the intercropped system of walnut and winter barley and investigate how barley performed in that system in terms of yield, yield components, and nutrient content in the grain. Field trial consisted of three plots: a) control plot of monoculture barley; b) sole walnut orchard; c) walnut orchar...

The grain yield and concentrations of Fe, Zn, Se, Cd, and P in two winter wheat genotypes and in vitro bioaccessibility of Fe and Zn under the effect of different nitrogen fertilization and Zn-Se foliar application were evaluated. The total grain Fe, Zn, and Se concentrations, as well as Fe and Zn concentrations, after in vitro digestion were under...

An above‐ground plant diversity affects a below-ground biodiversity. A soil fauna diversity is important for the ecosystems’ sustainability. It reflects both the abiotic conditions and the soil’s biotic activity. This study’s objective was to assess the effect of an agroforestry system on the nematode abundance and trophic group distribution and on...

Agroforestry is the practice of integrating woody vegetation with crops and/or livestock production in order to strengthen ecological services on farmland and achieve a more multi-functional agricultural system. Crop yields determine economic outcomes when trees are young, but information on yields is scattered in the literature and a quantitative...

In order to investigate the possibility of reducing GHG in winter wheat production, field trial was set up in a 3-year experiment (VS) with four different tillage systems (TS) and three N fertilization norms (FN). The tillage systems were CT—conventional tillage, DT—disk harrowing, LT—soil loosening, and NT—no tillage system. N fertilization norms...

In Croatia, farmers are showing increasing interest in establishing walnut orchards for nut production on arable land due to higher anticipated net margins. One way to address the lack of profitability in the initial years when nut yields are low may be to plant arable intercrops. The anticipated impacts of this practice were assessed using a bioph...

Intercropping involves combining more plant species on the same parcel of land at the same time. The significance of intercropping is in the cultivation of plant species in systems that are less susceptible to different stress conditions. The aim of our research is to investigate buckwheat yields intercropped between alleys of grafted walnuts. The...

Biofortification experiments with three winter wheat cultivars treated with sodium selenate through foliar- and soil-fertilisation were conducted at two locations in Croatia and Serbia in two consecutive years to increase the selenium (Se) concentration in bread-making wheat grain. The treatments were: (a) 5 g ha⁻¹ Se foliar-, (b) 10 g ha⁻¹ Se foli...

Sažetak Zbog sve veće svijesti o ekologiji, komunalni otpad se koristi u svrhu dobivanja komposta. Kako bi se utvrdila kvaliteta takvog komposta ispitiana je energija klijavosti krastavca (Cucumis sativus L.) i salate (Lactuca sativa L.). U istraživanju je korišteno pet supstrata, dva dobivena iz komunalnog otpada, dva dobivena iz poljoprivrednih o...

Sažetak Soja je najzastupljenija i najbitnija leguminoza koja se proizvodi zbog visokog sadržaja ulja i bjelančevina u zrnu. Cilj istraživanja bio je ustanoviti utjecaj gnojidbe različitim količinama dušika i fosfora te primjene mikrobiološkog preparata na sadržaj ulja i bjelančevina. Najveći sadržaj ulja iznosio je 22,55%, a najveći sadržaj bjelan...

Determining potassium supply of soil plays an important role in intensive crop production, since it is the basis for balancing nutrients and issuing fertilizer recommendations for achieving high and stable yields within economic feasibility. The aim of this study was to compare the different extraction methods of soil potassium from arable horizon...

Application of Geographic Informatic System (GIS) in land-planning management has been well known among researchers for over 40 years, and for site-specific fertilization, it started to be recognized in the early 90s. GIS modeling in agriculture helps to identify site-specific distribution of a certain characteristics, and by creating theme maps as...

SAŽETAK Kisela tla, s pH reakcijom ispod 5,5, predstavljaju problem u poljoprivrednoj proizvodnji. Kao mjera podizanja pH reakcije tla i postizanja optimalnih pH vrijednosti često prijmjenjuje kalcizacija. Cilj istraživanja je utvrditi mogućnost primjene tri nova kalcizacijska materijala (drveni pepeo, fi ltarska prašina i bazična troska) te karbok...

The aim of this study was to compare electroultrafiltration extractable potassium (KEUF) from arable horizon (0-30 cm) of nine different soil types with ammonium lactate method (KAL), which is frequently used analytical method for determining the accessibility of nutrients and it is a common method used for issuing fertilizer recommendations.

Soil organic matter content is one of the main issues of European soils and agriculture in general. Various methods are used to determine organic matter. Most common approach is determining organic carbon from which organic matter is calculated as for example in wet combustion method by potassium dichromate and sulfuric acid. More robust, but easy-...

The research objective was to determine the influence of basic soil chemical properties on total concentration and available fractions of essential trace elements in the soil. Agrochemical soil analysis were conducted at two localities of different soil properties Berak and Vinogradci in eastern Croatia. The soil at the site Berak was eutric cambis...

It is well known that soil properties, metal speciation and plant species, especially soil-plant interactions, determine the availability of metals in soils. Therefore, various one-step extraction methods such as EDTA and DTPA have been used to represent the available fraction. In present study we observed the total (aqua regia) and available fract...

Long-term intensive agriculture without appropriate management is likely to cause soil degradation. Therefore, monitoring of soil quality in agricultural regions is essential for protecting soil and water resources and providing high-quality and safe food. Our objective was to quantify potential soil degradation by assessing trace element solubilit...

This paper provides a brief overview of the current positive legal regulations in the Republic of Croatia related to the agroforestry system of alley cropping production and discusses the possibilities and establishing this kind of production on the Croatian territory, especially its eastern and agriculturally most developed part - Slavonia. The pa...

Agroforestry can be defined as sustainable management system, which includes integration of agriculture and forestry. Silvoarable systems include intercropping of trees and crops. This paper presents the research on light intensity in such systems. The main aim of the research was to examine the light insolation inside poplar stands of different ag...

The aim of this paper is to determine fertilization and the frequency of analysis in Osijek- Baranja and Vukovar-Srijem counties. One third of the farms do not provide analysis and does not have any data, and 55% of farms has sufficient data on the soil. The 47% of farmers never use organic fertilizers. The average mineral fertilization was 112 kg...

Soil acidity is global factor limiting soil fertility of about 40% of the cultivable land which are acid. The common liming recommendations are based on different soil properties and therefore the calculation could differ according to available and used soil data. The aim of this paper was to determine the suitability of simple regression models fo...

Soil acidification results with the chemical changes in soil, especially with availability changes of P, K, Ca, Mg, essential and potentially toxic heavy metals. The aim of this paper was to determine the influence of acid soils liming to phosphorus and potassium availabilty change and to determine plant response. Liming and fertilization pot exper...

Far as is known there is no relevant information about the status of total and organic phosphorus in Croatian soils, so aim of this study was to determine the total and organic phosphorus in soils of the eastern Croatia. In total were collected 94 soil samples and the soil pH, organic matter as well as the total phosphorus content and organic phosp...

Intensive agriculture throughout a long period is likely to cause soil degradation. Therefore, monitoring of soil quality in agricultural regions is essential for food quality and food safety. The present study is conducted in the agricultural region of Croatia (Osijek-Baranja County) where 74 samples were collected from forest land (21) and agricu...

Various extraction methods are used to predict plant uptake of trace metals. Most commonly it is total concentration that is used for risk assessment and evaluation of trace metal availability. However, recent studies showed that total concentration is a poor indicator of availability while concentrations in soil solution show good correlation with...

Regression modelling and statistical correlations are often developed to aid reasonable predictions of metal solubility and free metal ion in terrestrial ecosystems. In the present study, we test how regression model predictions of metal solubility and free metal ion correlate with metal concentrations in plants. We previously optimised a model for...

Soil pH, soil organic matter (SOM), dissolved organic carbon (DOC) and total trace metal concentration (M(tot)) control the solubility of metals in the soil. Several regression models have included these soil chemical variables for the prediction of metal solubility and free metal ion (FMI) concentrations in contaminated soils. We hypothesize that...

Water extraction of trace elements can simulate the concentration of elements in the soil solution from where the plant takes up the elements. The objective of this investigation was to determine the water extractable concentration of seven trace elements (Fe, Mn, Ni, Co, Mo, Pb and Cd) and to assess their relationship with soil properties of the D...