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Issue Date
Title
Author(s)
1990
Nitrogen fixation of soybean in rice-based cropping systems = การตรึงไนโตรเจนในถั่วเหลืองที่ปลูกในระบบตามหลังข้าว / Ying Jifeng.
Ying, Jifeng.
1991
Replenishment of organic matter for maintaining soil productivity in rice-soybean cropping system = การเพิ่มอินทรีย์วัตถุเพื่อผดุงผลิตภาพของดินในระบบข้าว-ถั่วเหลือง / Wawta Wassananukul.
Wawta Wassananukul.
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Author
1
Wawta Wassananukul.
1
Ying, Jifeng.
Subject
1
Cropping systems -- Thailand, Nor...
1
Humus.
1
Nitrogen -- Fixation.
1
Nitrogen fertilizers.
1
Soil productivity.
1
Soybean -- Fertilizers.
1
Soybean -- Soils.
1
Soybean.
Date issued
1
1991
1
1990