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โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

production types, which include conventional and organic Jasmine rice, by using three
experimental sites: wooden barn, tin barn, and home storage. The experiment was planned using
a factorial in a completely randomized design (CRD) for two factors, which include eight types of
paddy storage and a preservation time of 0-6 months. 4) The relationship analysis of the
preservation method used to maintain the rice quality analyzed the 2AP, head rive percentage,
humidity, and chalky grain percentage using Tobit regression analysis.

Study findings are divided into 3 significant parts according to the research objectives as
follows:
1) the barn condition, form and procedures of paddy storage, and incremental
cost of paddies storage.

From the study results, it is found that the postharvesting process, especially rice
drying to decrease humidity before storage, uses mainly household labor. Specifically, 81.57% of
farmers have a barn, and 62.73% of farmers store their Jasmine rice in their barn within the
vicinity followed by house-kept and house extensions storage. The average capacity of Jasmine
rice storage is approximately 13 tons. Farmers who kept Jasmine rice for sale have larger barns
than farmers who kept it for consumption, and irrigation area farmers have smaller barns that
those in other areas. The average useful life of a Jasmine rice barn is approximately 17.26 years,
as one in three farmers had repaired their barn in this time. Farmers who kept Jasmine rice to sell
are overrepresented in barn-repairing compared with other farmer groups. The Jasmine rice barn
height is approximately 1.45 meters above the ground and varies by the production environment.
Irrigation area farmers have barns with the lowest mean height. For the barn material used in
Jasmine rice storage, 91.83% of farmers tend to use wooden floors with wooden or tin walls,
while farmers who kept rice in their house or house extensions had barn floors of cement or
floor tiles with a foundation laid before rice storage occurs. Most granaries have a raised floor,
and farmers would use the area below as an animal pen or agricultural toolshed.
Before rice storage in barn or storage areas, farmers clean and search for damages in
the barn. Some farmers that own a barn prefer to keep rice in their house due to the
convenience of milling for consumption. The average usage frequency of barns is approximately
one or two times per month. For the knowledge of rice storage, most farmers rely on their own
experiences or their ancestors’. Approximately one in three farmers has been instructed in rice
storage methods, especially the for rice drying process and controlling rice humidity, but there
has been no training in rice storage methods.

The cost analysis in cash of Jasmine rice growing found that the average cost that
farmers accrue is 5,066 baht per ton, while the average price of Jasmine rice that receive during
the harvest season is approximately 9,524-10,271 baht per ton. While taking incremental costs of
growing Jasmine rice into account by using the price of Jasmine rice in the 2017/18 crop year, it is
found that farmers have incremental costs derived from weight loss and head rice percentage of
190 and 254 baht per ton in selling Jasmine rice after 3 and 6 months of storage, respectively.
When the rice drying cost is included, farmers would have averaged incremental costs of 526 and
590 baht per ton for Jasmine rice sales after 3 and 6 months of storage, respectively. Therefore,
farmers would receive profits of 9,518 to 10,244 baht per ton, which is over the cash-cost of
4,954 baht per ton.

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