Gregory Alexander Van der Heijden

6 Questions 14 Answers 0 Followers

Questions related from Gregory Alexander Van der Heijden

How to model in a simple but effective way the transfer of solid organic matter in a soil profile?

I am working on a biogeochemical cycling model for forest ecosystems. In these ecosystems, organic matter in the litter layer or mineral soil is most important for the nutrient cycles. Many models...

04 February 2014 2,698 4 View

Can forests provide biomass to produce the energy of the future in a sustainable way?

Economic and political pressure encourages the use of wood biomass to produce "green" energy and mitigate CO2 emissions. While some forests grow on nutrient rich soils and the nutrient supply is...

12 January 2014 8,013 27 View

What is the best way to extract cations from the organic cation exchanger of the forest floor or litter?

I am interested in nutrient cations such as Magnesium, calcium and potassium in the litter-layer of forest soils. Analyzing total Mg, Ca and K content of the litter is quite straight forward (acid...

17 December 2013 9,081 11 View

What are the different Mg and Ca isotope fractionation processes in the plant and in the soil?

I am carrying out a review of all the isotope fractionation processes in forest ecosystems. The idea is to be able to create a map of the ecosystem and place all fractionation processes, their...

29 November 2013 680 3 View

How can I model soil temperature from air temperature in a simple model?

I am doing a lot of modeling in biogeochemical cycles in forest soils. I would need to include in my model a function to predict soil temperature at different depths from the temperature of the...

21 November 2013 6,226 5 View

Can anyone suggest software to build causal loop diagrams for system analysis?

I do a lot of modelling and system analysis. The best mean for that is paper, however, it would be handy to have a piece of software to build these diagrams on a computer for publication,...

20 November 2013 8,071 24 View