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  <controlfield tag="008">210402s9999    xx            000 0 und d</controlfield>
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   <subfield code="a">So sánh hiệu quả kỹ thuật của mô hình tôm sú-cua biển với mô hình tôm sú tại hai Xã Cù Lao Long Hoà và Hoà Minh-Huyện Châu Thành-Tỉnh Trà Vinh :</subfield>
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   <subfield code="a">Hiệu quả kỹ thuật trong bài nghiên cứu này được ước lượng từ hàm sản xuất biên ngẫu nhiên dạng Cobb-Douglas, dựa trên số lượng sơ cấp thu thập từ 183 nông hộ ở hai xã Hoà Minh và Long Hoà, Huyện Châu Thành, Tỉnh Trà Vinh. Các yếu tố sản xuất ảnh hưởng đến doanh thu của nha nông trong mô hình tôm sú-cua biển là giống, thức ăn, thuốc hoá học, nguyên nhiên kiệu. Và các yếu tố ảnh hưởng đến doanh thu cảu nhà nông trong mô hình tôm sú công nghiệp là diện tích, thức ăn, thuốc hoá học, lao động gia đỉnh.</subfield>
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   <subfield code="x">Khía cạnh kinh tế,Economic aspects</subfield>
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   <subfield code="a">Kim, Thị Ngọc Yến</subfield>
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   <subfield code="a">Trung tâm Học liệu Trường Đại học Cần Thơ</subfield>
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