Soils - Nitrogen content.

Mineral nitrogen in the plant-soil system / by: (Language materials, printed)

15N tracing of microbial assimilation, partitioning and transport of fertilisers in grassland soils by: (Electronic resources)

Soil and recycling management in the Anthropocene era by: (Electronic resources)

Soil nitrogen ecology by: (Electronic resources)

Biogeosciences.

Crops and nitrogen.

Plant Sciences.

Environmental Chemistry.

Nitrification.

Nitrogen cycle.

Nitrogen fertilizers.

Plants, Effect of nitrogen on.

Analytical Chemistry.

Nature Conservation.

Microbial Ecology.

Environment, general.

Plant-soil relationships.

Soils- Nitrogen content.

Nitrogen- Fixation.

Microbiology.

Landscape Ecology.

Biotechnology.

Agriculture.

Waste Management/Waste Technology.