Horse waste is rich in phosphorus and also nitrogen compared to normal soil.

和普通土壤相比，马粪更富含磷和氮。

youdao

The appearance showed that the effect of adsorbing and entrapping nitrogen in gravel riverbed were better than which in normal soil riverbed.

该现象表明砾石河床对氮的吸附截留效果由于普通土壤河床。

youdao

The soil in the boxes contained normal nitrogen.

盒中的土壤包含了正常含量的氮。

youdao

This will help dry the soil. In normal conditions, placing mulch around rose plants is a good idea.

VOA: special.2010.06.15

The phosphate rock industry there (extracted to use in fertilisers) leaves a waste called phosphogypsum. this is around and about 30 parts per million (ppm, and normal soil is about 3 ppm) uranium and it can most certainly be processed to extract that.

FORBES: Iran Announces New Uranium Deposits: Don't Panic!