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F References and literature for further reading 1
A Principles and guidelines for the use of isotopically labelled fertilizers
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absorber absorption access tube acid alpha particles amount analysis approximately atoms attenuation coefficient autoradiographic Autoradiography background beaker beta particles biological calculated calibration carbon carrier-free chemical Chernozemic chloride concentration constant containing count-rate counting efficiency curve cylinder density detector determined dilution distilled water distribution dose electron energy equation experiment fertilizer flask fraction g soil gamma photons gamma-ray Geiger counter GM tube half-life IAEA infiltration ionizing isotope Key reference kinetic labelled laboratory period leaching liquid scintillation mass Materials and equipment measured method NaOH Ndff nitrogen Nitrogen-15 nucleus nuclide nutrient obtained phosphorus photomultiplier photons pipette planchet plant material plot Proc procedure radiation radioactive decay radioisotope radionuclide reaction Rennie roots scintillation counter soil column soil depth Soil Sci soil surface soil-water content solution specific activity technique tensiometers thickness titrated tracer tritiated water uptake versus vial voltage volume water content