The article presents the results of the use of drones and GIS technologies during pilot testing of new types of agro-ameliorants and humic preparations to assess the effectiveness of reducing the accumulation of radionuclides in agricultural products grown on radioactively contaminated agricultural land in the Bryansk region. In the course of the work, an assessment of experimental farms was carried out to select the optimal sites for testing, as well as their digitization using an unmanned aerial vehicle equipped with a two-piece geodetic receiver to determine the exact geographical coordinates. Subsequently, with the help of a drone, fertilizer application was monitored, and the germination of agricultural plants was assessed after the application of agromeliorants.
Based on the received materials, a library of electronic maps of the territories where the work was carried out was created in the ArcGis software environment. They included 4 farms of the Novozybkov district and 2 farms of the Krasnogorsk district. The library of electronic maps included cartographic information on the types of land use, surface contamination of soils with 137Cs, types and granulometric composition of soils, their agrochemical parameters, germination, yield, reduction ratio of 137Cs inflow into crop and forage production, as well as on the boundaries of elementary experimental plots with the designation type of fertilizer applied.
The results of the work are the information base for solving real problems of applying new technologies in agricultural production aimed at reducing the content of 137Cs in crop and fodder production 

Victor V. Krechetnikov
Researcher
Russian Institute of Radiology and Agroecology
Kievskoe shosse 109 km, Obninsk, Kaluga region, 249032, Russia
е-mail: viktor.krechetnikov@mail.ru
ORCID: 0000-0002-6099-6917
Scopus: 57208577554

Evgeniya O. Krechetnikova
Junior Researcher
Russian Institute of Radiology and Agroecology
Kievskoe shosse 109 km, Obninsk, Kaluga region, 249032, Russia
e-mail: evg.krechet@yandex.ru
ORCID: 0000-0002-3601-2201

Igor E. Titov
Researcher
Russian Institute of Radiology and Agroecology
Kievskoe shosse 109 km, Obninsk, Kaluga region, 249032, Russia
e-mail: titan13_08@mail.ru
ORCID: 0000-0002-5275-3229
Scopus: 36449472300

Nikolai G. Ivankin
Researcher
Russian Institute of Radiology and Agroecology
Kievskoe shosse 109 km, Obninsk, Kaluga region, 249032, Russia