Question

what is ignition temperature​

Answer 1

The autoignition temperature or kindling point of a substance is the lowest temperature at which it spontaneously ignites in normal atmosphere without an external source of ignition, such as a flame or spark. This temperature is required to supply the activation energy needed for combustion.

Answer 2

The day/night temperature regime was 25°/17°C or 25°/20°C. Maximum depression of substrate and leaf temperature caused by the irrigation water temperature (IWT) was about 13°C. The substrate temperature returned to air temperature within 40 minutes and the leaves of the plants within 0.5°C of the air temperature