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About Growing Degree Hours | Predicting Harvest Date | GO TO THE MODEL | References Growing Degree Hours & GDH30 Why are GDH30 & Harvest Timing Related? Why are GDH30 & Fruit Size Related? How can growers use GDH30 figures?
CIMIS Station Location Map Hourly air temperatures, collected from the California Irrigation Management Information System (CIMIS) weather stations, are used to calculate chilling units. Each night, Pomology Weather Services downloads the data through the CIMIS system.
Weather-Related Models (Pomology Weather Services) was created to provide a simple and efficient way to disseminate timely weather-related tree crop information to California fruit and nut growers, researchers, and industry professionals.
California California Data Exchange Center California Dept. of Water Resources, Division of Flood Management. Access point to the CDWR Operational Hydrologic Data. Snow pack, river stages, stream flows, precip/snow.
Using Growing Degree Hours | Predicting Harvest Date | GO TO THE MODEL | References Threshold Estimating Established Models Generating Your Own Model There are three approaches to using the GDH30 accumulation figures for your location to predict an approximate harvest date: using a rough threshold e...
Using Growing Degree Hours | Predicting Harvest Date | GO TO THE MODEL | References Anderson et al., 1986 Validation of chill unit and flower bud phenology models for Montmorency sour cherry. Acta Hort., 184: 71-78.
From Ken Shackel, Professor, Dept. of Plant Sciences, UC Davis The Pressure Chamber (The Bomb) This hand-pump device is used to measure water potential in leaf stems. It provides directions for use, including step-by-step photo sequence, and details of application to prunes/dried plums.
Update 1/2/2018: #138 Famoso was vandalized 1/13/16, and will not be repaired. Stations #167 Tracy and #161 Patterson are inactive. #167Tracy has been terminated and the station is scheduled to be removed.
Weather-Related Models > Chilling Accumulation Models Stone and pome fruit trees rely on enough chilling for flowers and leaf buds to develop normally.
