Saturday, October 1, 2022
从多年生牧草营养物质动态来讲,草地放牧不能早于()。A、牧草分蘖(分枝)期B、牧草抽穗(孕蕾)期C、牧草高度在10-15cm时D、土壤解冻时...
Saturday, April 27, 2024
多年生牧草分类:根据发育速度和寿命长短:()。根据寿命长短:()。...
Sunday, March 24, 2024
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Monday, September 12, 2022
Thursday, July 13, 2023
依据新枝形成特点,白三叶为()多年生草类。A、根茎型B、匍匐茎型C、鳞茎型D、根颈型...
Saturday, October 1, 2022
Saturday, April 27, 2024
Friday, January 12, 2024
Thursday, November 16, 2023
Friday, January 12, 2024
Wednesday, September 14, 2022
Sunday, March 24, 2024
选择补播地段应考虑当地()。在没有灌溉条件的地区,补播地区至少应...
Wednesday, September 14, 2022
Monday, September 12, 2022
植物—生境分类法(中国南北草办分类法)中类的划分指标选用()。A、植被和气候特征B、植被特征C、气候特征D、植被和土地特征...
Sunday, March 24, 2024
Saturday, October 1, 2022
依据新枝形成特点,紫花苜蓿为()多年生草类。A、根茎型B、匍匐茎型C、鳞茎型D、根颈型...
Wednesday, December 6, 2023
Thursday, November 16, 2023