Evaluation of a prototype spreader in the distribution of poultry manure

A study of a prototype spreader evaluated the distribution of four poultry manures differing in terms of composting degree and moisture content. The chemical and physical properties such as wet bulk density, moisture content, and static frictional characteristics of the manures were evaluated. The prototype was set up for orchard and arable crops and the spinner speed and point of delivery of the organic fertilizer onto the spinners were adjusted. When properly adjusted it was suitable for broadcast manure distribution and in bands. In the former, an increase in spinner speed improved the throwing width and effective swath width. The best results for the point of delivery of the organic material were achieved by moving the point of delivery away from the center of the spinners. In the band distribution, the best results were observed when the point of delivery coincided with the center of the spinners and spinner speed was low. The physical properties of the fertilizers influenced the distribution pattern. The poorest results were observed in the distribution of manure with large particles and high moisture content. A proper management process of poultry manure is recommended for improving the distribution quality.