Data

Source

Period

Deposition

(dry and wet)

Ministry of the Environment,

National Institute of Environmental Research (NIER)

1999-2010

DON

Fertilizer, manure, and fixation

Ministry of the Environment,

NIER,

Rural Development Administration (RDA)

1999-2010

DON

Sewage discharge

Ministry of the Environment,

NIER

2008-2010

DON