One of the basic principles of sustainable agriculture is to an emphasis on the use of natural plant nutrients. This is generally provided by the animal manure. Liquid animal manure, which is rich in nitrogen, is unfortunately thrown into ditches and rivers without making use of it in our country. Lack of information regarding the liquid animal manure storage and the inadequacy of legal regulations cause the excessive manure applications and the intense environmental pollution on lands near the animal farms. Pollution of groundwater and surface water threatens the human and animal health in all nearby regions, especially the farms. Therefore, the fact that livestock plants have appropriate liquid manure storages is important. The liquid manure kept in storages should be able to be spread on agricultural lands with liquid spreader tanks according to the need of soil and plant. For this purpose, in recent years, there have been massive increases in manufacture and importation of solid manure spreading trailers and liquid manure spreading tanks. In this study, a domestic manufactured, tractor pulled type, rear-flapper spreading, and liquid manure spreader tank with a capacity of 8000 L was used. In the field studies carried out, parameters at different three feed rates (3, 6 and 9 km/h) of the machine were determined such as the operating time, effective operation achievements, manuring flow rates, manuring capacities (tons/ha and tons/h) and spinning rates. According to the obtained results, the effective operating time at 6 km/h feed rate, the effective operation achievements, the manuring capacity per unit area and the manuring capacity per unit of time were observed as 0.19 h/ha, 5.26 ha/h, 17.5 tons/ha and 126.0 tons/h, respectively