fertilizer. However, the quality of the resulting spread pattern in the field can be poor,
Therefore, the study aims to test a modulating disc (A2) and control disc (A1) and find the
effect of change on the machine performance using different of forward speeds, disc speed,
urea fertilizer and barley seeds. Results showed that use of the disc A2 reduces the
coefficient of variation (CV%). The machine reached its best performance when using A2 …