diff --git a/backend/right_tree/api/admin.py b/backend/right_tree/api/admin.py
index 248b038..a6f58f0 100644
--- a/backend/right_tree/api/admin.py
+++ b/backend/right_tree/api/admin.py
@@ -13,7 +13,7 @@ class ZoneAdmin(admin.ModelAdmin):
 
 
 class QuestionnaireAdmin(admin.ModelAdmin):
-    list_display = ['address_display', 'location_display', 'soil_variant', 'ecological_district', 'habitat', 'zone']
+    list_display = ['address_display', 'location_display', 'soil_variant', 'ecological_district_display', 'habitat', 'zone']
     actions = ['export']
 
     @admin.display(description="Address")
@@ -24,6 +24,14 @@ class QuestionnaireAdmin(admin.ModelAdmin):
     def location_display(self, obj):
         return f"({obj.location.x}, {obj.location.y})"
 
+    @admin.display(description="Ecological District")
+    def ecological_district_display(self, obj):
+        return getattr(
+            models.EcologicalDistrictLayer.objects.filter(geom__intersects=obj.location).first(),
+            "ecologic_2",
+            None,
+        )
+
     @admin.action(description="Export planting guides for selected questionnaires")
     def export(self, request, queryset):
         export = models.Export.objects.create(creation_date=timezone.now())
diff --git a/backend/right_tree/api/models.py b/backend/right_tree/api/models.py
index 8fbc732..1d23ebc 100644
--- a/backend/right_tree/api/models.py
+++ b/backend/right_tree/api/models.py
@@ -208,14 +208,6 @@ class Questionnaire(models.Model):
     def habitat(self):
         return self.zone.habitat
 
-    @property
-    def ecological_district_layer(self):
-        return EcologicalDistrictLayer.objects.filter(geom__intersects=self.location).first()
-
-    @property
-    def ecological_district(self):
-        return self.ecological_district_layer.ecologic_2
-
     @cached_property
     def address(self):
         return \
@@ -264,8 +256,9 @@ class Export(models.Model):
 
         _, files = storage.listdir(f"export_{self.pk}")
 
-        # halved as there are two files (csv, pdf) per questionnaire
-        return 0.5 * len(files) / self.questionnaires.count()
+        # 0.25 multiplier as there are four files per questionnaire:
+        # csv, filters PDF, plants PDF, merged PDF
+        return 0.25 * len(files) / self.questionnaires.count()
 
     def export(self):
         from .tasks import generate_pdf