Thursday, February 1, 2024
Monday, September 18, 2023
耕作制度的历史演进经历了四种类型,即(),(),(),()。...
Friday, March 29, 2024
Wednesday, December 7, 2022
我国日照时数最多的中心在塔里木盆地东部、内蒙西部、宁夏、甘肃北部、柴达木盆地和西藏西部地区。...
Thursday, May 4, 2023
Saturday, December 31, 2022
Wednesday, September 14, 2022
半养地作物主要包括()A、小麦B、玉米C、花生D、水稻E、油菜...
Friday, March 29, 2024
Friday, June 9, 2023
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Tuesday, October 17, 2023
Wednesday, September 14, 2022
从播种面积看,()、玉米是我国播种面积占第二位和第三位的作物。A、小麦B、马铃薯C、黑豆D、燕麦...
Monday, March 25, 2024
Sunday, December 17, 2023
Friday, June 9, 2023
通常土壤水分多时,不利于微生物活动,有机质矿化率低,此时有利于有机质的()A、分解B、积累C、矿化D、腐殖化...
Sunday, January 7, 2024
Monday, September 18, 2023
下列哪种作物是禾本科作物()A、小麦B、马铃薯C、大豆D、甘蔗...
Sunday, December 17, 2023
我国耕作制度改革的主要成就包括提高复种指数,发展多熟制;发展了适于机械化的耕作制度;进一步强化了养地制度等七个方面的内容。...
Sunday, December 10, 2023