Four farmswere included in this study: two types of animal confine-
ments (swine and poultry), one corn farm, and one mushroomcultiva-
tion farm. The characteristics of these agricultural environments and
farming activities are summarized in Table 1.The field tests were
conducted during the following farming activities: animal feeding, rou-
tine examination and floor cleaning on a swine farm, egg collection and
routine examination of facilities on a poultry farm, grain harvesting and
routine investigation in a corn field, and routine examination of mush-
room growth, mushroom harvesting, and waste handling on a mush-
room farm. Each sampling lasted for about 60 min and took as much
Four farmswere included in this study: two types of animal confine-ments (swine and poultry), one corn farm, and one mushroomcultiva-tion farm. The characteristics of these agricultural environments andfarming activities are summarized in Table 1.The field tests wereconducted during the following farming activities: animal feeding, rou-tine examination and floor cleaning on a swine farm, egg collection androutine examination of facilities on a poultry farm, grain harvesting androutine investigation in a corn field, and routine examination of mush-room growth, mushroom harvesting, and waste handling on a mush-room farm. Each sampling lasted for about 60 min and took as much
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