Monthly Cumulative Precipitatiom vs. Evapotranspiration:
This chart shows the cumulative amount of precipitation (moisture incoming) to evapotranspiration (moisture outgoing) plotted on a daily basis for the month. If the evapotranspiration exceeds the precipitation value it indicates a negative moisture balance which can effect nectar flow and perhaps the need to provide water to hives.At Black Birch Farm Apiaries we monitor Soil Moisture, Precipitation, and Evapotranspiration to determine moisture stress on both hive activity and nectar flow