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  <controlfield tag="008">210402s9999    xx            000 0 und d</controlfield>
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   <subfield code="a">Hiệu quả của phân hữu cơ vi sinh trong cải thiện độ phì nhiêu đất và khả năng khám bệnh trên hành tím (Allium cepa) tại huyện Vĩnh Châu :</subfield>
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   <subfield code="c">Đặng Thị Cúc ; Võ Thị Gương, Dương Minh giáo viên hướng dẫn</subfield>
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   <subfield code="a">Nội dung đề tài nhằm cải thiện một số tính chất hóa lý sinh học đất và phòng trừ bệnh hại trên hành tím bằng sủ dụng phana hữu cơ bã bùn mía chủng nấm Trichoderma</subfield>
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