Optimized design and experiment of a controllable rotary tube strip fertilizer spreader for hilly mountainous terrain.

Acknowledgements: The authors acknowledge the financial support provided by the Heilongjiang Province Natural Science Foundation of China, grant number LH2023E025, the Chinese Academy of Tropical Agricultural Sciences for Science and Technology Innovation Team of National Tropical Agricultural Science Center, grant number CATASCXTD202409, and the Harbin Cambridge University Key Scientific Research Application Research Project, grant number JQZKY2022021.The authors wish to express their thanks to all supporters.