@article{aoyama_yoshida_hirai_kumada_1988, 
  title={有機質資材の窒素形態変化能推定条件の検討}, 
  volume={59}, 
  DOI={10.20710/dojo.59.4_363}, 
  number={4}, 
  publisher={Japanese Society of Soil Science and Plant Nutrition}, 
  author={AOYAMA, Masakazu and YOSHIDA, Koji and HIRAI, Ryuhei and KUMADA, Kyoichi}, 
  year={1988}
  }