There is an irrigation pond
for a circular irrigation system near the drainage canal outlet of
the A10 site
The irrigation period is usually from April to August
and the rice-growing season is from April to September
Crops such as onions and sweet potatoes are cultivated in the vegetable field throughout the year
Commercial pig production takes place inside pig barns with an
approximate pig density of 30 head ha1
within A10 in 2002. Livestock wastes were stored in earthen waste storage ponds as a standard disposal method until November 2004
After that time, the use of livestock wastes as manure has
been promoted and the earthen waste storage ponds are unused
estimated the annual nitrogen input in
2002 to be approximately 600 kg N ha1
(livestock waste, 79.9%;
fertilizer, 15.2%; precipitation, 2.2%; human waste, 1.8%; and irrigation water, 0.9%).