According to data of the observation to pear easily damaged by hail in semiarid area in south Ningxia,it was important to defend pear from hail damage in the growth period.The field experiment was conducted to study the air humidity,soil moisture and soil temperature change law in pear orchard with the hail defend-net.The results showed that both the air humidity in one-meter high air and the soil moisture at the profile depth of 0~200 cm were increased when suing the hail defend-net,while the soil temperat...
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