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Publications (40)
Barley is an ecologically adaptable crop widely used in agriculture and well suited for organic farming. Satellite imagery from Sentinel-2 can support crop monitoring and yield prediction, optimising production processes. This study compares two types of Sentinel-2 data—standard (S2) data with 10 m and 20 m resolution and Sentinel-2 Deep Resolution...
The barley crop is widely used in the economic life of humanity and is characterized by great ecological plasticity. It is a good competitor to other cereals, which is why it is extremely suitable for growing in organic farming. The multispectral data obtained from the COPERNICUS Sentinel-2 satellites has proven in numerous scientific works its app...
The study presents findings on the assessment of actual evapotranspiration across croplands using vegetation index data, facilitated by the Google Earth Engine platform. This research emphasizes the importance of remote sensing in understanding water requirements for crops, contributing to improved agricultural practices and water management strate...
This paper discusses the intended use of spectral index and color (RGB) composite images obtained by the SENTINEL-2 pair of satellites as part of the space segment of the European Copernicus Earth observation program. The characteristics of the spectral channels are presented for their application in environmental studie s. Some of the most used co...
In the period 2023-2024, on the territory of the "Sinite Kamani" Nature Park, Eastern
Stara Planina, Bulgaria, the circadian and spatial activity overlap of selected predator mammals
was analyzed. The aim of the study is to determine whether niche segregations are observed in
the spatial and temporal relationships between mutually competing predato...
This study investigates the potential of Earth observation research in improving air quality management and supporting telemedicine initiatives in response to the COVID-19 pandemic. Utilizing ground stations in Sofia and Burgas, we collected hourly measurements of NO2, CO, PM10, and PM2.5. Satellite data from TROPOMI-S5p and ground-based air qualit...
The consumption of organically produced foods is gaining increasing popularity. Simultaneously, the areas under organic control are expanding. Data obtained from the Sentinel-2 satellite are exceptionally suitable for agricultural monitoring, as the mission provides data every 2–3 days, allowing for the tracking of changes in crops. Einkorn, known...
Remote sensing has been used for improving understanding of the climate system and its changes. It enables to monitor the Earth's surface, ocean and atmosphere at several spatio-temporal scales, thus allowing climate system observations, as well as investigating climate-related processes or long and short-term phenomena. Remote sensing techniques,...
The rice plant is one of the most widely consumed crops globally, and its height is a key indicator of growth. This study explored the relationship between rice plant height, measured in situ in Bulgaria and Türkiye, and multi-temporal data from Sentinel-1 and Sentinel-2 satellites to develop models for height estimation. The strongest correlation...
Мнозина може да не подозират, че кариерите за промишлен добив на инертни материали като чакъл пясък, глина и др. представляват специфичен изкуствено създаден (биотоп) за многобройни животински и растител-ни видове. Съществува обаче и "конфликт на интереси" на тези територии. Кариерите представляват земни ями с различна площ и дълбочина. Сте-ните им...
In this study, we investigated the opportunity to use unmanned aerial vehicles (UAV) imagery to monitor weeds, einkorn biomass, and yields in organic einkorn fields. The BBCH scale for cereals (Biologische Bundesanstalt, Bundessortenamt and Chemical) was used to determine the phenological phases of the crop. Images were captured during two major cr...
The BBCH (Biologische Bundesanstalt, Bundessortenamt and Chemical) scale was used to determine crop phenology. Ground data were collected in phases BBCH 29, 45 and 75. In phase BBCH 29, zones with three differences in the vegetation index NDVI were determined, respectively NDVI-0.86, 0.74 and 0.63. In the field, in the three zones with different ND...
The aim of this study is to predict and map winter wheat yield in the Parvomay municipality, situated in the Upper Thracian Lowland of Bulgaria, utilizing satellite data from Sentinel-2. The main crops grown in the research area are winter wheat, rapeseed, sunflower, and maize. To distinguish winter wheat fields accurately, we evaluated classificat...
The present research was conducted during the agricultural year 2022-2023 in the land of Byala Reka village, Parvomai municipality in central southern Bulgaria. The ground data for the yield was collected from an organically certified field sown with barley, which is part of the holding of ET "Borislav Slavchev". The BBCH scale for cereal plants wa...
The use of remote sensing methods for monitoring, managing, and decision support in agriculture is increasingly intensifying. With the advancement of technologies, they become more accessible, while the quality and security of the obtained data are improving. Striving to improve the quality of the environment and its preservation, expanding the are...
The primary goal of this research is to create a health integration system for the swift identification of COVID-19 and similar pandemic infections. Given the rapid transmission rate of this disease, it's crucial to develop advanced technology to prevent human-to-human transmission. This system incorporates a 3D tool that utilizes a combination of...
In 2021 in northwestern Bulgaria, on the territory of State Forestry "Midzhur", West Stara Planina Mtn, we analysed the temporal and spatial activity of the roe deer (Capreolus capreolus) in an area with scarce other large ungulates. In the locations where both wolf and roe deer were recorded a significant (75%) temporal overlap between the two spe...
Abstract: Aerospace methods have traditionally found great use in archaeology. The problem with them is that they are expensive and have low temporal and spatial resolution. With the development of technology in recent years, unmanned aerial vehicle (UAV) systems have become increasingly suitable for application in archeology [Rinaudo et al. 2012]....
This publication comprises some results from Dragon-5 project "ID.57160: Monitoring Water Productivity In Crop Production Areas From Food Security Perspectives". Accurately measuring the amount of water (e.g., evapotranspiration-ET) and energy (e.g., of latent and sensible heat) that are exchanged at the Earth's surface is crucial for various appli...
Due to climate changes, a number of changes are observed in the world's oceans, such as a change in the amount of thermal energy and water temperature, a change in sea and ocean currents, as well as an increase in acidification. These changes lead to a change in sea water as a habitat for marine ecosystems. Since the beginning of the new millennium...
This publication is a review of the application of remote sensing methods for wildlife population monitoring in zoology. Remote sensing methods are divided into four categories. The first category of methods examines the application of camera traps, the second is about application of Unmanned Aerial Vehicles (UAV), the third category examines the a...
Water use efficiency and water productivity are becoming increasingly important for food security. The role of sustainable food production is emphasized by UN SDGs and is of particular importance in the new decade, where also water scarcity issues are going to exacerbate due to climate change and anthropogenic factors. The chapter will review the r...
Abstract: Reduced start-up processing in organic farming dates back to the early 1950s, when Rusch developed his ideas. It can be said that two approaches have been taken to conservation start-up processing - North American and European. Research in North America focuses mainly on zero soil processing, with this type of soil treatment barely practi...
Above-ground biomass (AGB) is considered an essential climate variable that underpins our knowledge and information about the role of forests in mitigating climate change. The availability of satellite-based AGB and AGB change (ΔAGB) products has increased in recent years. Here we assessed the past decade net ΔAGB derived from four recent global mu...
Organic farming is a much more sustainable farming system than conventional farming. It is part of humanity's efforts to preserve biodiversity and provides healthy and safe food to humans. Remote sensing methods are widely used in agriculture. Their use will help the transition from conventional to organic farming. They can help farmers choose the...
The aim of the present study is to determine which type of data processing obtained from an unmanned aerial vehicle (UAV) is more suitable for predicting the yields of the eikorn crop grown under organic farming conditions. The comparison is made between data obtained from the UAV at the pixel level of 7 × 7 cm and when aggregating the pixels to a...
Abstract: The aim of the present study is to establish a group of vegetation indices generated from data obtained from an unmanned aerial vehicle for predicting the yields of einkorn grown in organic farming conditions. The experiment was conducted during the agriculture year 2020-2021 on a certified organic field located in the municipality of Par...
Abstract: Remote sensing (RS) have been used since the early 1970s for zoological research. RS have been used as a method for remote monitoring, detection and counting of animals. RS has been found to be a suitable method for detecting and counting some animal populations (Heyland 1972; Lavigne & Øritsland 1974).
In the presented methodology for aerospace monitoring of autumn wheat crops, grown under the conditions of organic farming, the ways of applying ground and aerospace methods are discussed in detail. This includes field experiments, phenological observations, GIS and remote sensing methods and data (data from Sentinel-2 satellite and WingtraOne unma...
In the presented methodology for aerospace monitoring of autumn wheat crops, grown under the conditions of organic farming, the ways of applying ground and aerospace methods are discussed in detail. This includes field experiments, phenological observations, GIS and remote sensing methods and data (data from Sentinel-2 satellite and WingtraOne unma...
Biomass is monitored in many agricultural studies because it is closely related to the growth of the crop. The technique of digital repeat photography that continuously capture images of a given area with an RGB or near-infrared enabled cameras, Phenocams, has been used for more than a decade mainly to estimate phenology. Studies have found a relat...
Phenocams that capture images of a given area in the RGB or near-infrared (NIR) spectrum have been used for more than a decade to estimate phenology in natural landscapes and crop fields. The aim of our study is to estimate phenological parameters, start (SOS) and end (EOS) of season, for barley, from RGB and NIR Phenocam and compare them with in-s...
In recent years, a number of studies have proven that the conventional agricultural system is not sustainable, toxic to the environment, human health, and its potential to feed humanity is limited to the next 50 years. With this in mind, as well as the increasing demand for healthy and safe foods, and the increase in the proportion of people who ca...
The main objective of the study is to monitor crops for the 2019/2020 agricultural year with the use of low resolution NDVI and MVHI products of NASA and summary statistics of ground truth from the monthly bulletins of NIMH and annual report by Bulgarian Ministry of agriculture, food and forestry for the territory of Bulgaria. The hypothesis tested...
In this study, an overview is made and a comparative analysis of articles, reports and materials dealing with organic farming of LWC, in the period 1970 to 2021 is performed. After analysing the literature, the following conclusions are made: Cereals occupy a particularly important place in organic farming, the main advantages of their cultivation...
EN title: Possibilities for forecasting the yield of organic wheat using aerospace methods
Abstract: With climate change, adverse natural phenomena, such as floods and droughts, are becoming more common, which in turn are a major threat to wheat yields. Almost all regions of the planet are vulnerable to such climatic events. Remote sensing methods...
In recent years, a number of studies have proven that the conventional agricultural system is not sustainable, toxic to the environment, human health, and its potential to feed humanity is limited to the next 50 years. With this in mind, as well as the increasing demand for healthy and safe foods, and the increase in the proportion of people who ca...
Atanasova, D., Maneva, V. & Chanev, M. (2018). Phytosanitary status of wintering oat (Avena sativa L.) crops in Southeastern Bulgaria. Field Crops Studies, XI(2), 229-234. The study presents monitoring results in wintering oat crops in the region of Southeastern Bulgaria. The aim of the study is to determine the species composition of weeds, diseas...
