Instrumental soil water and heat measurements in a wheat field of south Bulgaria
1997
Kolev, Nicola | Alexieva, Stefka | Kirkova, Yordanka (Nikola Poushkarov Institute of Soil Science and Agroecology, Sofia (Bulgaria))
Wheat growth simulation models constructed by a collaborative team of the Agrophysical Institute - Sanct Petersburg, Russia and Nikola Poushkarov Institute of Soil Science and Agroecology - Sofia, Bulgaria exploit the relationschip between various agrometeorological components of the water and heat balance of the system "soil - plant - atmosphere" of the field. The sensitivity of these models depends on the variation in the water content and temperature in the soil profile and they need objective data about these variables measured in the field. Significant steps in the direction of evaluating soil moisture and temperature based on portable electronic devices were taken by Alexieva and Ilieva (1991) who evaluated the influence of some thermal characteristics to the soil moisture. Stated differently the water and heat fluxes are relatively dependent on the wheat canopy and continuos measurement of their components is necessary. The purpose of the paper is to show an approach for easy and realiable instrumental evaluation of the main water and heat balance components in a wheat field.
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