Saabunud / Received 26.01.2020 ; Aktsepteeritud / Accepted 12.05.2020 ; Avaldatud veebis / Published online 12.05.2020 ; Vastutav autor / Corresponding author: Edvin Nugis e-mail: [email protected] paper aims to present the use of various treatments for
the differential application of nitrogen in the precision farming system. To
assess the state of the vegetation cover, both ground-based observations
and associated remote sensing methods were used. Assessment of the state
of plants (Menkovsky of AFI, 2009–2011) was carried out according to
the phases of their growth and development using an N-tester in the field,
as well as analysis of plant samples in a specialized laboratory. Remote
sensing was carried out at the time of the analysis of plant samples using
unmanned aerial vehicles equipped with cameras that allow shooting in
different areas of the spectrum. The test sites with predetermined doses of
nitrogen fertilizers for decrypt the obtained images were used. It is shown
that for differential application of nitrogen fertilizers in spring wheat crops
it is advisable to use the optical characteristics of the state of plants
performed using calibration test sites. We have found that the maximum
yield in the differentiated nitrogen applications treatment (TK-4) was
4510 kg per hectare (kg ha–1
). At the same time, the minimum in the TK1 treatment was 3780 kg ha–1
. On average, over the years of research
differentiated fertilizer application increased the collection of protein per
hectare by 15–17%. In the TK-4 treatment for three years, a grain was
obtained that corresponded to the first quality class (exceed 14%) in terms
of protein content. Our novel research has shown that for characterizing
the state of plants an assessment is given which was performed using
calibration test sites
