@brokeLad myself and
@Ray are just discussing the finer details of our fert regimes
@Ray your graphs don't account for the drop in the concentration during the day so IMO dont give a true image of whats happening.
I will use Zorfoxs calculator to show what I believe
First of all we have to make some assumptions and adjustments to allow me to explain using Zorfoxs calculator and applying a few conversion ratios
1.we will use NO3 for convenience
2. NO3 uptake is constant throughout the day (which it probably isn't)
3. we will say the daily dose is 7ppm, and weekly dose is 49ppm for ease
4. A day will be 7 days in Zorfoxs calculator
5. a week will be 49 days in Zorfoxs calculator
6. 10 weeks is 490 days in Zorfoxs calculator
so 7ppm every seven days (daily)
compare with your corresponding dose regime 49ppm every 49 days (weekly)
Who's regime has the biggest peaks and troughs
(Obviously Zorfoxs calculator isnt designed for this fine tuning and it doesn't handle it well when the plants uptake is greater than the dose, its something I will add to the Fert Calculator thats being worked on for the future)
Obviously if the uptake is less than the dose will be be fine as the NO3 will always be in excess.
However if the weekly uptake is greater than the weekly dose, the plants will be hungry for a few days at a time between dosing, where as daily dosing limited NO3 arrives every day (runs out during day)
So IMO daily dosing will have less daily fluctuations than weekly dosing as the results shows above.