Until now, some rice recessive long culm mutants from the semidwarf varieties have been reported, but there has been no report on the dominant long culm mutant.

到目前为止，对半矮秆水稻的隐性高秆突变已有不少报道，至于半矮秆水稻的显性高秆突变，国内外尚未见报道。

youdao

The result shows that the unit weight of culm changes along with the age of culm.

结果表明，竹杆容重随年龄的变化反映了毛竹个体独特的生长分化特点。

youdao

There is no obvious difference of the culm yield between culm cutting age of 4~5 and 6~7 years old in the bamboo stands, which are intensively cultivated by soil digging and fertilization.

在垦复、施肥等集约培育的纸浆毛竹林中，实施砍伐4、5年生竹（竹龄均为周年），竹材产量与砍伐6、7年生竹的一般材用竹林相若，差异不显著。

youdao

The Culm Measures area of north Devon covers 60, 000 hectares and is in three pockets.

BBC: Making a home for rare wildlife in north Devon

There is also a flood alert for the River Culm due to the rain and melting snow.

BBC: More snow is forecast overnight in Devon

The Culm grassland is based on heavy clay which is unusable for agriculture, so is largely untouched apart from the expert management from the Devon Wildlife Trust.

BBC: Making a home for rare wildlife in north Devon