8.1 Reducing agricultural pollution
p. 385-386
Texte intégral
Based on the collated evidence, what is the current assessment of the effectiveness of interventions to reduce agricultural pollution for enhancing soil fertility?
Unknown effectiveness (limited evidence) | ● Change the timing of manure application |
Likely to be ineffective or harmful | ● Reduce fertilizer, pesticide or herbicide use generally |
Unknown effectiveness (limited evidence)
Change the timing of manure application
One controlled, randomized, replicated, site comparison study from the UK found less nitrate was lost from the soil when manure application was delayed from autumn until December or January.
Soil types covered: sandy loam.
Assessment: unknown effectiveness (effectiveness 50%; certainty 33%; harms 24%).
http://www.conservationevidence.com/actions/893
Likely to be ineffective or harmful
Reduce fertilizer, pesticide or herbicide use generally
Biodiversity: Two site comparison studies from Italy and Pakistan (one also replicated) found a higher diversity of soil invertebrates and microorganisms in low chemical-input systems.
Nutrient loss: One study from Canada found lower nutrient levels and yields in low-input systems.
Soil types covered: course sandy, loam, sandy loam, and silt.
Assessment: likely to be ineffective or harmful (effectiveness 26%; certainty 40%; harms 48%).
http://www.conservationevidence.com/actions/904
Le texte seul est utilisable sous licence Creative Commons - Attribution 4.0 International - CC BY 4.0. Les autres éléments (illustrations, fichiers annexes importés) sont « Tous droits réservés », sauf mention contraire.
