在全国农业学大寨会议精神的鼓舞下,我国北方地区的广大贫下中农和农垦战士,响应毛主席“农业学大寨”的伟大号召,以大寨为榜样,破除“猫冬”旧习,变冬闲为冬忙,坚持冬季大搞以改土治水为中心的农田基本建设。冬季施工在我国北方地区农田基本建设中占有很大比重,而且有不少农田基本建设工程,如平整土地、低洼易涝地的改良等工程,主要在冬季,有的甚至只能在冬季进行。但是我国东北、华北、西北地区,由南到北每年有三至五个月的结冻期。土壤最大冻深可达一尺到五尺不等,甚至更大。由于气候寒 Inspired by the spirit of the Dazhai Conference on Agriculture in China, the vast number of poor and middle-income peasants and land reclamation fighters in northern China responded to the great call of Chairman Mao for “learning Dazhai Agriculture” and took Dazhai as an example to get rid of “cat winter ”Old habits, change winter winter busy, adhere to winter vigorously to improve soil and water governance as the center of farmland infrastructure. Winter construction occupies a large proportion of the farmland infrastructures in the northern part of our country. And there are many farmland infrastructural projects, such as land leveling and low-lying flood-prone land improvement projects, mainly in winter and some even in winter. However, in Northeast China, North China and Northwest China, there are three to five months of freezing period from south to north every year. The maximum deep freezing depth of soil can range from one foot to five feet or more. Due to the cold weather