Product details

Salinity of soils and plant substrates

Salinity of soils and plant substrates

Item no.: P1521162

Measurement Type: with a computer, Mobile (Datalogging), Outdoors

Difficulty Expenditure of Time print
PHYWE SYSTEME GMBH
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Principle

How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient salts for plant growth and to which of them nutrients should be added in the form of fertilisers.

Plants obtain their nutrients in the form of ions from the salts in the soil. The most important nutrients of a total of 16 nutrients that a plant needs for its growth are nitrogen in the form of nitrates and ammonium, phosphor in the form of phosphates and potassium in the form of potassium salts. In addition, the soils also require lime (calcium carbonate) in order to avoid acidification (decrease of the pH). For agricultural production, these nutrients are added to the soil via inorganic fertilisers, while potting compost with fertilisers is used for house plants.

Benefits

  • Experiment is part of an experiment set with numerous experiments in ecology
  • Universal handheld measurement device can also be used for other measurement parameters relevant in ecology, biology and chemistry
  • Outdoors measurement possible, for mobile use
  • Graphical display of measurement data
  • Data can be saved on SD memory card
  • All data can be transferred onto a computer for data analysis
  • Data analysis software can be freely distributed

Tasks

  1. Selecting appropriate samples
  2. Prepare samples for analysis
  3. Determination of the conductivity of the samples
  4. Comparison of the measurement values of the samples 

What you can learn about

  • Salt content 
  • Soil sample
  • Plant substrate
  • Fertilizer

 

Document     Filesize
1521162e.pdf Experiment guide, English 213.35 KB