Climate response and phenology Phenothermal index (PTI) Calculator point May 5, 2026 (Last updated: July 23, 2026) 0 comments Phenothermal Index (PTI) PTI = ΣGDD / Number of Days Total GDD (ΣGDD) Number of Days Calculate Post navigation Previous: Heliothermal unit (HTU)Next: Heat use efficiency (HUE) Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Related Stories Climate response and phenology Thermal time requirement Calculator point May 5, 2026 0 Climate response and phenology Climate productivity index Calculator point May 5, 2026 0 Climate response and phenology Crop Coefficient (Kc) Calculator Calculator point May 5, 2026 0
