Artikkelit kirjoittajalta Risto Rikala

Risto Rikala, Juha Heiskanen. Turpeen puristenesteen sähkönjohtavuuden riippuvuus vesipitoisuudesta.
English title: Relationship between electrical conductivity and water content in peat growth medium.
Avainsanat: fertilization; nutrient monitoring; TDR
Tiivistelmä | Näytä lisätiedot | Artikkeli PDF-muodossa | Tekijät
The relationship between electrical conductivity (EC) of press-water extract and water content (WC) of peat growth medium at desorption was studied. A simple time-domain reflectometer (TDR), traditional laboratory conductivity meter and gravimetric weighing were used to measure EC and WC. The relationship between EC values measured with a laboratory conductivity meter from press-water extract and those measured with TDR directly from peat medium was curvilinear. The relationship between WC of peat measured with TDR and that determined gravimetrically, although nearly linear, was slightly sigmoidal. Empirical curve between EC values and WC values measured with TDR was close to the theoretical curve, which was calculated on the basis of increase in ion concentration at desorption. Transformed EC values of press-water extract were higher than the theoretically calculated values. For comparison of EC values measured from press-water extracts in various water contents, transforming coefficients were derived. Key words: nutrient monitoring, fertilization, TDR
  • Rikala, The Finnish Forest Research Institute, Suonenjoki Research Station, FIN-77600 Suonenjoki, Finland Sähköposti: ei.tietoa@nn.oo (sähköposti)
  • Heiskanen, Sähköposti: ei.tietoa@nn.oo

Rekisteröidy
Click this link to register to Suo - Mires and peat.
Kirjaudu sisään
Jos olet rekisteröitynyt käyttäjä, kirjaudu sisään tallentaaksesi valitsemasi artikkelit myöhempää käyttöä varten.
Ilmoitukset päivityksistä
Kirjautumalla saat tiedotteet uudesta julkaisusta
Valitsemasi artikkelit
Lähetä sähköpostiin
Swanson D., (2007) Interaction of mire microtopography, water suppl.. Suo - Mires and peat vol. 58 no. 2 artikkeli 9853 (poista) | Muokkaa kommenttia
Damman A. H., Tolonen K. et al. (1992) Element retention and removal in ombrotrophic pe.. Suo - Mires and peat vol. 43 no. 4-5 artikkeli 9696 (poista) | Muokkaa kommenttia
Gorham E., Janssens J. A. (1992) The paleorecord of geochemistry and hydrology in.. Suo - Mires and peat vol. 43 no. 4-5 artikkeli 9694 (poista) | Muokkaa kommenttia
Tolonen K., (1963) A peat profil from Valkasuo of Tohmajärvi Suo - Mires and peat vol. 14 no. 2 artikkeli 9304 (poista) | Muokkaa kommenttia