Influence of fertilization and fallow land on the amount of humus and nutrient reserves in soils under permanent grassland - summary

The main results are:

• The addition of mineral nitrogen fertilizer, especially Nitramoncal , leads to severe soil acidification .
• The addition of superphosphate significantly increases the total phosphorus concentration in the topsoil .
• The addition of manure (stable manure and manure) increases the soil pH and humus content in the topsoil .
• The addition of mineral N and P fertilizer reduces the root mass in the soil.
• Fallow grassland and mineral K fertilizers increase the root mass in the soil.
• NPK fertilizers and the addition of manure increase the harvestable above-ground phytomass .
• The supply of manure (stable manure and manure) contributes slightly to carbon sequestration in the topsoil .