问题:土壤中磷的形态按化学分类可分为()A、有机态磷B、无机态磷C、水溶性磷D、难溶性磷
Monday, October 2, 2023
问题:土壤胶体的基本构造有()。A、胶核B、决定电位离子层C、非活性补偿离子层D、扩散层
Thursday, September 15, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:根据吸收养分的能力大小,作物可分为()、()和()3种类型。
Thursday, September 15, 2022
Thursday, September 15, 2022
Friday, September 16, 2022
Saturday, June 24, 2023
Friday, September 16, 2022
Monday, September 12, 2022
问题:试述植物通过哪些适应性机制来应答对环境养分缺乏的胁迫?
Friday, September 16, 2022
Monday, September 12, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:下列哪些器官可称为可逆库()A、块根和块茎B、叶鞘和茎杆C、种子D、果实
Friday, September 16, 2022
Thursday, January 11, 2024