{
  "maize": { "name": "Maissilage", "gasYield": 0.35, "acid": 1.0 },
  "manure": { "name": "Gülle", "gasYield": 0.15, "acid": 0.3 },
  "grass": { "name": "Grassilage", "gasYield": 0.30, "acid": 0.8 }
}