水稻手工杂交中，采用当日授粉1次、当日隔时授粉2次和隔日授粉2次对杂交结实率的影响差异并不显著。不同授粉方式对穗颈以上2个节位......

Coffee (Coffea canephora) is the principal cash crop and the country’s largest agricultural foreign revenue earner in U......

Beekeeping is one of the recommended approaches in the implementation of poverty alleviation programs in rural areas of ......