UPDATE

weather/apps.py

@@ -1,3 +1,5 @@
+from functools import cached_property
+
 from django.apps import AppConfig
 
 
@@ -5,3 +7,21 @@ class WeatherConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "weather"
     verbose_name = "Weather Forecast"
+
+    @cached_property
+    def farm_weather_service(self):
+        from .farm_weather import FarmWeatherService
+
+        return FarmWeatherService()
+
+    def get_farm_weather_service(self):
+        return self.farm_weather_service
+
+    @cached_property
+    def water_need_service(self):
+        from .water_need_prediction import WaterNeedPredictionService
+
+        return WaterNeedPredictionService()
+
+    def get_water_need_service(self):
+        return self.water_need_service