Description of long-term field experiments in China.

Nr.   Name Started  Farming Information  Soil Quality
Monitoring		 Main target
    China
 28 Red soil fertility long-term exp  1990

Farming system: crop rotation, two crops annually
Main crops: wheat, maize, soybean
Productivity level: low
Management: Rotation; Fertilisation;


Chemical,

 improve soil fertility and quality
29 Paddy soil long-term experiment  1981

Farming system: rice-rice rotation, two crops annually
Main crops: rice
Productivity level: medium
Management: Rotation


Chemical

 improve soil fertility
30 Fluvo-aquic soil fert. long-term exp.  1990

Farming system: crop rotation, two crops annually
Main crops: wheat, maize, soybean
Productivity level: medium
Management: Rotation, Tillage 

Physical,
Chemical

 improve phys soil fertility
31 Black soil quality long-term exp.  1981

Farming system: maize continue, one crop annually
Main crops: maize, soybean
Productivity level: medium
Management: Organic matter


Chemical

 soil organic matter
 32 Fert. of Calcareous Purple soil  1982

Farming system: rice-wheat rotation
Main crops: rice, wheat
Productivity level: low
Management: Fertilisation

Chemical

 crops yield change
33 Zhifanggou Watershed  1990 Farming system: dryland farming
Main crops: maize, millet, potato, beans
Productivity level: low-medium
Management: Tillage		 Physical, Chemical improve soil water
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