| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| jmh_desiderio | "Good day, i would like to ask on how did you manage to measure the nutrient uptake of a plant. i am currently doing a thesis for the measurement of..." | Read more » | over 3 years ago | |||
| Aleksi12358 | "Lamotte produces hydroponic test kit but it is over 300$ for 4 nutrients. Problem with test meant for soil is that they dont show results as ppm or..." | Read more » | over 6 years ago | |||
| Aleksi12358 | "That is so good! I will order Public lab spectrometer or parts for it from somewhere and few photometer reagents so that I can do some tests so tha..." | Read more » | over 6 years ago | |||
| warren | "Yes definitely the diy spectrometers on this site can have their range narrowly selected. See SpectralWorkbench.org for some examples! " | Read more » | over 6 years ago | |||
| Aleksi12358 | "So it is possible to use spectrometer as colorimeter. Is it possible to choose to read narrow band of spectrum with Public lab spectrometer softwa..." | Read more » | over 6 years ago | |||
| Aleksi12358 | "Thank you for links. I will contact person who designed that automatic water tester and ask few question about accuracy of readings and use of diff..." | Read more » | over 6 years ago | |||
| Aleksi12358 | "Thank you for suggestion. I will look into it. " | Read more » | over 6 years ago | |||
| warren | "Also Markos, from the spectrometry mailing list, chimed in with:grinning: Hi, I apologize for sending here a reply to the question proposed at: ..." | Read more » | over 6 years ago | |||
| Ag8n | "The public lab instrument will cover a part of the NIR. Unless you can find very cheap used FTIR, the cost of the instrument will far exceed your ..." | Read more » | over 6 years ago | |||
| warren | "And in case there are updates from others, let's see if @Frikkie or @winsorje have something to add? " | Read more » | over 6 years ago | |||
| warren | "Maybe @fez who asked this would be interested too: https://publiclab.org/questions/fez/02-01-2017/diy-methods-for-nitrate-detection-in-food " | Read more » | over 6 years ago | |||
| warren | "Hi, just for starters there are a couple interesting projects related to nitrate detection here: https://publiclab.org/tag/nitrate There's also t..." | Read more » | over 6 years ago | |||
| Ag8n | "I have very little experience with soil testing. So the local extension agent was called. He suggested the lamotte NPK test kits. One that will ..." | Read more » | over 6 years ago | |||
| Aleksi12358 | "Hello. I would like to measure every plant nutrient from macro to micro but I think macro nutrients(nitrogen, potassium, phosphorus, sulfur, calci..." | Read more » | over 6 years ago | |||
| warren | "Hi, which nutrients are you hoping to measure? " | Read more » | over 6 years ago | |||
| stevie | "Emailed in from Erin Haacker: "I poked around in that direction, and you might consider getting in touch with J. Raymond Kessler: http://hort.aubur..." | Read more » | over 6 years ago | |||
| Deissymb | "Hi ksmith0, Here's a link where you can see how to build vegetable home garden with an irrigation system included: https://www.youtube.com/watch?..." | Read more » | over 6 years ago | |||
| ksmith0 | "Outdoor space " | Read more » | over 6 years ago | |||
| liz | "indoor or outdoor space? " | Read more » | over 6 years ago | |||
| Sidney_AstroPlant | "Using NIR LEDs seems like a good option to look into and I'm happy to hear that I might not have to deal with extensive filtering! I just got a res..." | Read more » | over 7 years ago | |||
| cfastie | "A simple option might be to turn on some NIR LEDs when the photography happens. The NIR:VIS ratio might not match sunlight, but if you know what it..." | Read more » | over 7 years ago | |||
| Sidney_AstroPlant | "The kit is fully enclosed with LED with a certain blue and red ratio (I have to verify what the exact ratio is). This brings me to the conclusion t..." | Read more » | over 7 years ago | |||
| cfastie | "Thanks for adding a photo. NDVI is based on the assumption that the light illuminating the foliage has a certain proportion of NIR and VIS -- the p..." | Read more » | over 7 years ago | |||
| cfastie | "Using two cameras solves one of the two problems I described (mixed NIR and VIS). That problem can also be solved by measuring or making assumption..." | Read more » | over 7 years ago |