更多humic例句

1. This deposit, if obtained from light brown peat, is ulmic acid; if from black peat, it is humic acid.
2. A small portion of nitrogen unites with hydrogen, forming ammonia, which remains combined with the humic and other acids.
3. This solvent separates the humic and ulmic acids from the undecomposed vegetable fibers.
4. In such soils humic acids are present and the requisite alkalinity is thus awanting.
5. We are well aware that the nitrogen present in the humic matter of the soil is readily nitrifiable.