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   <subfield code="a">Ảnh hưởng của phân hữu cơ đến sự hình thành và khả năng lưu tồn carbon trong các cấp đoàn lạp đất :</subfield>
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   <subfield code="a">Đánh giá ảnh hưởng của phân hữu cơ đến sự phân bố các cấp hạt đất khác nhau. Đánh giá ảnh hưởng của phân hữu cơ đến tổng hàm lượng phân C hữu cơ và thành phần C dễ và khó phân hủy hiện diện trong các cấp hạt đất trên những loại đất khác nhau.</subfield>
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