Recently, three farmers in Qingzhou City, Shandong Province, developed the first domestic rotary plough plane cultivator in the country, passed the expert appraisal organized by the Shandong Agricultural Machinery Station, and obtained new practical patents from the State Intellectual Property Office. According to experts from Shandong Agricultural Machinery Station, this agricultural rotary ploughing deep ploughing machine consists of mechanical rakes and rotary cultivators. It is hauled by a tractor with more than 50 hp. It is a combination of deep plowing, thinning, and leveling. Up to 25 cm - 30 cm, the efficiency of farming is more than double that of conventional plowing. Moreover, the cultivated land is fine and flat, no ditch, no ridges, and large and small lands are suitable for operation. This new type of agricultural machinery that fills the gaps in the country has now been put into mass production. It has also been listed as a key promotion and farming implement in Shandong Province. It is understood that the invention of this new type of agricultural machinery product is the peasants Yang Zhihe, Zhang Jingtian and Wang Junzhao of Tongzi Village, Dongxia Town, Qingzhou City. The three of them love agricultural machinery design. Since 1998, they have conducted design tests on agricultural rotary ploughing and deep ploughing machines. They have invested a total of 1.5 million yuan in design funds, tested hundreds of times, and finally succeeded.
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