- 期刊
- OpenAccess
Evaluating of Broadcasting Uniformity of Centrifugal and Oscillating Granular Broadcasters
並列摘要
The uniformity and accuracy of chemical fertilizer and seed broadcasting on field surface are significant parameters of broadcaster performance. Improper and inaccurate broadcasting causes abnormal and nonhomogeneous soil fertility which is against to the purposes of sustainable agriculture. Broadcasters also are used for planting seeds like wheat, barley etc., soit's appropriate performance effect on crop production. The results of this study help us to analyze broadcaster performance parameters and choose suitable device for best fitting to our purposes. In this research, the uniformity performance of oscillating and centrifugal broadcaster was studied. The research was done using factorial experiment in form of randomized complete block design with three factors and three replications. Three factors were used:1- broadcaster type including oscillating and centrifugal, 2-Material types to be broadcasted including a)urea fertilizer, b)ammonium phosphate fertilizer and c)wheat seed with different mass and density were used and 3-broadcasters gate opening rates(two levels including fully open and semi-open outlet gate). All treatments were applied according to ASAE S341.2, 1999 test code. The EXCEL datasheet was used to provide histogram of broadcasting pattern. The performance parameters used were the uniformity of each broadcaster that was measured by using broadcasting pattern and astatistical index, coefficient of variation. The analysis was done with the 99% level of confidence which showed that oscillating broadcaster had higher broadcasting uniformity than centrifugal broadcaster. Also results showed that increasing the average of particles mass would increase the uniformity of broadcasting. Results indicated that increasing broadcasting rate due to increasing output flow rate of particles, would decrease uniformity of broadcasting.