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去年,我们在杨家公社台前大队四队进行了硫铵深施试验。试验地为河淤土,每亩底施猪圈粪7,500斤、
Last year, we carried out deep-seeding trials of ammonium sulfate at the four brigades of the brigade station in front of Yang’s commune. Experimental soil for the river silt, at the end of the pigsty stool 7,500 pounds,