diff --git a/CarbonCalculation.cs b/CarbonCalculation.cs
index 71d54de..e86da0c 100644
--- a/CarbonCalculation.cs
+++ b/CarbonCalculation.cs
@@ -156,7 +156,7 @@ namespace FarmMapsAPI.Carbon
                                     Crop = cropYear.MiterraCropName,
                                     CropRes = cropYear.CropRes,
                                     OrganicManures =
-                                    cropYear.OrganicManures.Select(x => new OrganicManureType { Type = x.Type, Quantity = x.Quantity }).ToList(),
+                                    cropYear.OrganicManures.Where(y=>y.Quantity > 0 && !string.IsNullOrEmpty(y.Type)).Select(x => new OrganicManureType { Type = x.Type, Quantity = x.Quantity }).ToList(),
                                     CropYield = cropYear.CropYield } }
                             });
                         }
@@ -170,7 +170,10 @@ namespace FarmMapsAPI.Carbon
                                 {
                                     foreach (var manure in cropYear.OrganicManures)
                                     {
-                                        orgManure.Add(new OrganicManureType { Type = manure.Type, Quantity = manure.Quantity });
+                                        if (!string.IsNullOrEmpty(manure.Type) && manure.Quantity > 0)
+                                        {
+                                            orgManure.Add(new OrganicManureType { Type = manure.Type, Quantity = manure.Quantity });
+                                        }
                                     }
                                 }
                                 var crop = mappedCropData.SingleOrDefault(x => x.Year == crops.Year);