5 research outputs found
Dependence of Conditioner Power Input on Mowing Machine Material Feed Rate
Rosana G. Moreira, Editor-in-Chief; Texas A&M UniversityThis is a Technical Paper from International Commission of Agricultural Engineering (CIGR, Commission Internationale du Genie Rural) E-Journal Volume 5 (2003): F. Kumhala, M. Kroulik, and V. Prosek. Dependence of Conditioner Power Input on Mowing Machine Material Feed Rate. Vol. V. July 2003
Landsat and Sentinel-2 images as a tool for the effective estimation of winter and spring cultivar growth and yield prediction in the Czech Republic
The influence of climate and topography on crop
condition and yield estimates is most effectively monitored by
non-invasive satellite imagery. This paper evaluates the efficiency
of free-access Sentinel 2 and Landsat 5, 7 and 8 satellite images
scanned by different sensors on wheat growth and yield prediction.
Five winter and spring wheat cultivars were grown between
2005 and 2017 in a relatively small 11.5 ha field with a 6% slope.
The normalized difference vegetation index was derived from
the satellite images acquired for later growth phases of the wheat
crops (Biologische Bundesanstalt, Bundessorenamt and Chemical
industry 55 – 70) and then compared with the topography wetness
index, crop yields and yield frequency maps. The results showed
a better correlation of data obtained over one day (R2 = 0.876)
than data with a one-day delay (R2 = 0.689) using the Sentinel
2 B8 band instead of the B8A band for the near-infrared part of
electromagnetic spectrum in the normalized difference vegetation
index calculation