更多humus例句

1. But enough humus–time to get back outside, and see a little archeology!
2. The particular phenomena of vegetation also afford abundant evidence that humus cannot be the only source of carbon.
3. It did not notice Forrester scurrying away in the shape of an ant through the leaves and thick humus of the jungle floor.
4. The generation of the humus-acids is probably hastened during the digestion of the many half-decayed leaves which worms consume.
5. The upper few inches of soil is humus rich in organic matter; below this is clay.
6. See that the soil contains enough humus or vegetable mold to make it rich and to enable it to hold moisture.