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![Effect Of Tied Ridging And Fertilizer On The Productivity Of Sorghum [Sorghum Bicolor (L.)Moench] At Raya Valley, Northern Ethiopia](https://static.kopykitab.com/image/cache/data/journals/jr0052-161x244.jpg "Effect Of Tied Ridging And Fertilizer On The Productivity Of Sorghum [Sorghum Bicolor (L.)Moench] At Raya Valley, Northern Ethiopia")