Using Spectrometer to measure soil nutrient solutions

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SUMMARY

This discussion focuses on the use of spectrometers to measure soil nutrient solutions, specifically nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) levels. Vito Mancini highlights the challenges of measuring these trace elements using standard spectrometers, suggesting that techniques such as Inductively Coupled Plasma (ICP) and atomic absorption are more suitable for accurate quantification. The conversation also touches on the possibility of using reagents to assist in measurement, with results typically reported in parts per million (ppm).

PREREQUISITES
  • Understanding of soil nutrient dynamics
  • Familiarity with spectroscopic techniques, particularly ICP and atomic absorption
  • Knowledge of soil moisture extraction methods
  • Basic principles of trace element analysis
NEXT STEPS
  • Research the capabilities of Inductively Coupled Plasma (ICP) spectroscopy for soil analysis
  • Explore atomic absorption spectroscopy techniques for measuring trace elements
  • Investigate the use of reagents in soil nutrient testing
  • Learn about soil moisture extraction methods and their impact on nutrient measurement
USEFUL FOR

Agricultural scientists, soil chemists, farmers, and anyone involved in soil nutrient management and analysis.

vmancini
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Hi Guys,

Sorry for dumping this thread in here, I really wouldn't know where this would fit...

I'm a farmer in Australia and I'm trying out these really simple devices to measure nutrient levels in my soil, they're basically a ceramic container with a small hose that gets buried into the root zone of my crop, I use a syringe to create a vacuum in the container which slowly draws soil moisture over night for extraction the following day.

My question is: Can the N,P,K,Ca,Mg levels be measured in a Spectrometer? Is it complicated if it can be done? Do you need a certain type of spectrometer?

Thanks,

Vito Mancini
 
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As I know, those elements are in traced level so it is nearly impossible to use some kinds of photospectrographs to identify and quantify. You can use techniques such as ICPs or atomic asorption for the purpose.
 
All I know is that the results that I've been getting back from the labs are returned in ppm... is that trace level? I spoke to someone today and they said you may be able to use reagents to do the trick, anyone know?

Thanks for your comment pixel01

Vito
 

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