I came across these 2 equipment for soil nutrient (NPK) analysis/monitoring. And would like to find out which would give a more reliable/accurate reading.
1. Hanna Instrument HI 83325 - Multiparameter Photometer - uses an extraction method (Mehlich 3)
2. Horiba - the ion/salt Laqua set. - Direct measurement
Would also like to find out, if there are any publications with data from this 2 equipment.
There is no single equipment capable of estmating NPK together....we need different equipemnts for these three nutrients analysis in soil, depending upon , whether soil is acidic or alkaline/calcareous in nature...you will have to choose the type of extrcatant accordingly...please consult any soil analysis manual or standard book , you will find all these in plenty ....
Thank you everyone for the answers and comments.
I am aware of the many options /availability of methods and procedures in soil nutrient analysis. However, my concerns are for the two equipment. How reliable are the two equipment in the soil nutrient analysis:
1. Hanna Instrument HI 83325 - Multiparameter Photometer - uses an extraction method (Mehlich 3)
2. Horiba - the ion/salt Laqua set. - Direct measurement
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