Dear Ravindra Kumar Panigrahi
The optimum temperature for germination of many plant seeds
is 20-25 °C (ISTA rules, 2010).
Optimum temperature for seed germination varied according to the crop as well as variety, so it can not be generalized.
It depends upon the species of seed to be germinated because cardinal temperature for seed germination varied with respect to species or variety.
Dear
According to the Ganheali et al., 2011
average optimum temperatures of genotypes for germination differed from 20.4 to 26.5 oC,
Reference : "DETERMINATION OF CARDINAL TEMPERATURES AND THERMAL TIME REQUIREMENT DURING GERMINATION AND EMERGENCE OF CHICKPEA GENOTYPES (CICER ARIETINUM L.) "
ISTA has recommended a constant temperature of 20 c and 90 % relative humidity and germination testing methods for chickpea. Standard germination test in Kabuli chickpea is affected due to presence of thin seed coat and bold seediness, hence it requires more moisture for germination.
So, I think that below link can be useful for you.
(https://www.researchgate.net/publication/327252161_An_improved_method_of_seed_germination_testing_in_Kabuli_chickpea [accessed Jun 29 2019].
The best decision is to follow the ISTA rules. Best regards, Walter
If you follow ISTA rôles, you must use a sandy substrate moistened at 15%.
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