In October, staff and volunteers from ECHO Asia accompanied
students from the International Sustainable Development Studies Institute
(ISDSI) on a hike between the Pang Daeng Nai, Mae Jawn and Huai Pong
communities in Chiang Mai’s Chiang Dao district. October was the perfect time to see the local
production of green manure/cover crops, such as rice bean (Vigna umbellata)
that is produced in a farming system known as relay cropping. The rice bean was planted into a fully mature
stand of corn around the end of August.
By the time the corn is harvested in September or October, a thick stand
of beans has become established during the final weeks of the rainy season,
forming an excellent soil-improving ground cover. After the bean crop is harvested in January,
farmers allow the decomposing corn and bean residues to remain in the field in
order to supplement soil organic matter.
October was also a good time to see the mature upland rice
fields. Farmers in these communities
often rotate production years of relay-cropped corn and legumes with upland
rice production. When the upland rice is
planted, it is also grown with other rain-fed field crops such as grain sorghum,
foxtail millet and pigeon pea as well as understory crops that include cucumber
and pumpkin.
And interspersed between the hill fields are agroforest
plots planted by local farmers in diverse mixtures of fruit trees, such as
mango, and indigenous forest species, such as rattan (Calamus and Daemonorops
species), black sugar palm (Arenga westerhoutii), fishtail palm (Caryota
mitis), fan palm (Livistona speciosa), forest vine pepper (Piper
interruptum) and snowflake tree (Trevesia palmata). The farmers, such as Mr. Jawa in the Huai
Pong Community, value the forest crops as they produce non-timber forest
products that have become increasingly rare in the region due to the
overharvest and forest degradation.
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