Taking into account the equation (attached in the image) about the time required for 50% germination (T50). I want to know what exactly you, tj, ni and nj mean? What values do they represent?
They are counts and times for adjacent counts i.e. counts i and j
In this question, you have time and number; i represent the time to first radicle protrusion or normal seedlings if any, and j is time to the last observation. The notation for time is ti .... j and for observation is ni .... j. The time interval may be chosen based on the time to every event (germination) to fit a distribution of probability and estimate the T50 (time to 50% of germination) or to calculate an index using only two measurements. Fitting probability distributions (Weibull - see in my page or RGate) denotes more precision on the responses. Please, follow the Rules from ISTA and AOSA about the number of seeds under investigation. Graded seeds are more uniform in the responses requiring minor time intervals while weeds, forest and pasture plants (research) will require seeds in numbers higher than recommended in the rules, and large time intervals. Please, I also suggest a literature review to solidify the theory about this subject. I hope you can enjoy this information. Best regards. Walter.
sayın hocam hayırlı günler.
tj, ni and nj bunlar nerede geçiyor. ne anlama geldiğini bende merak ettim. öğrenince beni de bilgilendirirsen sevinirim. Yukarıda José Walter Pedroza Carneiro (ti .... j and for observation is ni .... j) gibi bazı şeyler yazmış. ancak akla yatkın gelmiyor. Notasyon olarak bu tür kullanımlar bizde yoktur. 1, 2,....,i yada 1,2,...,j olarak verilir. i den j'ye yanlış bir kullanım. selamlar
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