Tuesday, August 29, 2023
Tuesday, March 26, 2024
问题:紫色土主要的剖面形态之一是()。A、剖面发育好,层次过度明显B、剖面发育差,层次过渡明显C、剖面发育差,层次过渡不明显D、剖面发育好,层次过渡不明显...
Friday, January 19, 2024
Sunday, January 22, 2023
Sunday, January 14, 2024
Tuesday, March 26, 2024
Friday, January 19, 2024
Tuesday, October 11, 2022
问题:调节森林土壤有机质可行的营林措施有。()A、主伐B、疏伐C、改变林分的树种组成D、清除部分凋落物E、挖排水沟...
Tuesday, October 11, 2022
Friday, January 19, 2024
Thursday, June 1, 2023
Wednesday, September 14, 2022
问题:植物必需营养元素按在植物体内的含量可分为()。A、全量元素B、大量元素C、中量元素D、微量元素E、营养元素...
Friday, January 19, 2024
问题:由自由扩散于土壤溶液中的氢离子浓度直接反应出来的酸度是()A、活性酸度B、潜性酸度C、水解性酸度D、交换性酸度...
Wednesday, September 13, 2023
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Tuesday, March 26, 2024
Thursday, August 24, 2023
Wednesday, September 14, 2022