Thursday, September 15, 2022
Wednesday, February 14, 2024
Monday, December 12, 2022
Thursday, September 15, 2022
Sunday, August 6, 2023
问题:什么是作物需水临界期?了解作物需水临界期有何意义?...
Saturday, April 1, 2023
Sunday, September 10, 2023
问题:对于旱作物,湿润年份及南方地区的灌水次数少,灌溉定额小;干旱年份及北方地区的灌水次数多,灌溉定额大。...
Monday, December 26, 2022
Sunday, August 6, 2023
问题:质量含水率(又称重量含水率)是指单位质量土壤中土壤水所占的比例。...
Monday, September 12, 2022
Wednesday, January 3, 2024
Friday, December 22, 2023
Thursday, September 15, 2022
问题:确定排涝设计流量和排水工程规模的重要依据是()。...
Thursday, September 15, 2022
Monday, September 12, 2022
Wednesday, March 29, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022
Saturday, April 1, 2023
Monday, December 12, 2022