Table 1 Scheme of the N agricultural system (sectoral) budget and the linking between its components soil surface budget, livestock budget and biogas budget
From: Nitrogen soil surface budgets for districts in Germany 1995 to 2017
Budget terma,b | Agricultural system budget | Soil surface budgetb | Livestock budget | Biogas budget |
|---|---|---|---|---|
Input | ||||
Mineral fertiliser (inorganic fertiliser) | + | +b | ||
Manure, transfer (import) from other regional entities (federal states, districts, abroad) | + | +b | ||
Compost, sewage sludge, meat-and-bone meal | + | +b | ||
Feed from domestic industrial production | + | + | ||
Feed import (from other regional entities or abroad) | + | + | ||
Biological N fixation | + | +b | ||
Biogas co-substrates (biowaste, non-agricultural origin) | + | + | ||
Seeds and planting material | + | +b | ||
Atmospheric NOx deposition on UAA | + | +b | ||
Internal flows (with respect to the sectoral budget) | ||||
Manure (on-farm production) for use as fertiliser | +b | – | ||
Animal manure (on-farm production) for use as substrate in biogas plants | – | + | ||
Harvest withdrawal of fodder crops (on-farm use in livestock production) | –b | + | ||
Harvest withdrawal of energy plants for biogas | –b | + | ||
Digestate from biogas plants | +b | – | ||
NH3 emission which returns as deposition on UAA | –b | –b | ||
Atmospheric net NH3 deposition on UAA | +b | |||
Output | ||||
Harvest withdrawal of marketed crops | – | – | ||
Marketed animal products | – | – | ||
Animal manure, transfer to other regional entities | – | – | ||
Digestate, transfer to other regional entities | – | – | ||
Budget surplus | Sum | Sum | Sum | Sum |