防風林からの距離によるヒヨドリのキャベツ食害率の変異
1994 年 43 巻 2 号 p. 101-103
詳細
1994 年 43 巻 2 号 p. 101-103
In order to determine factors which cause the variation of the ratio of cabbage leaves injured by Hypsipetes amaurotis, I counted the number of leaves injured and not injured for 10 cabbages sampled randomly from each ridge, and calculated the ratio of leaves injured. Analyses of linear regression showed that the ratio of cabbage leaves injured was higher near shelter belt.
