7、tthesametime,doingrandomizedblockexperimentwithdifferentconcentrationoffoliagespraywithanturalpondliquid,comparingthedifferencesofagronomicandyieldbetweendifferenttreatmentstogetthemostappropriateconcentrationandthebestperiodofnaturalpondliquidmazieseedsoaking.Theexperimentshows: T