CONTENTS 1
1 Dialogue:General Discussion 1
2 Dialogue:Major Soil Types 5
3 Dialogue:Soil Formation 9
4 Reading:Soil Structure 13
5 Dialogue:Soil Classification 16
6 Dialogue:Soil Chemicals(1) 20
7 Reading:Soil Chemicals(2) 23
8 Dialogue:Soil Chemicals(3) 25
9 Dialogue:Soil Chemicals(4) 29
10 Dialogue:Inorganic Fertilizer 32
11 Dialogue:Organic Fertilizer 36
12 Dialogue:Soil Fractions and Drainage 39
13 Dialogue:Tillage in Humid Areas(1) 44
14 Dialogue:Tillage in Humid Areas(2) 47
15 Reading:Dry Land Tillage 50
16 Dialogue:Cropping Systems 54
17 Dialogue:Irrigation(1) 58
18 Reading:Irrigation(2) 61
参考译文 64