In 2024, we conducted a field experiment at the Laboratory Field of the Biotechnical
Faculty, in which we compared different technical spraying parameters in 4 experiments
and determined the coverage of the winter wheat ear during flowering. The driving
speed of 6 km/h and the spraying pressure of 3 bar were constant for all experiments.
Water-sensitive papers were used to determine the degree of coverage of the front and
rear side wheat head. Droplet imprints were measured with the Wise Node measuring
device and the data were statistically processed. In the first experiment, we found that
increasing the nozzle volume flow rate or water consumption increases the mean
coverage of both the front and rear sides of the wheat head when using TFJ deflector
nozzles and their alternating arrangement. When using the Idta 04 asymmetric jet
injector nozzle (10° forward and 50° backward), better mean head coverage was
achieved than when using the TFJ 04 deflector nozzle. Regarding the spray height with
the TFJ 04 deflector nozzle, we found better wheat mean head coverage at a low spray
level of 10 cm. In the last experiment with different angles of the TTI 02 deflector nozzle
holders, it was shown that the 45° angle was the least optimal angle for good mean head
coverage compared to the angles of 0°, 15°and 30°. In most experiments, lower mean
coverage was found at the back of the wheat head.
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