@misc{indiciae01d6cf67695a,
  title = {Modelling soil productivity and pollution.},
  author = {D J Greenwood and A Walker},
  year = {1990},
  doi = {10.1098/rstb.1990.0172},
  url = {https://pubmed.ncbi.nlm.nih.gov/1979879/},
  note = {Source identifier: 1979879}
}