Gregory Alexander Van der Heijden

7 Questions 23 Answers 0 Followers

Questions related from Gregory Alexander Van der Heijden

Water vapor diffusion in air against an air flow?

Hi, I have a rather simple experiment in which I am evaporating water in a 250mL sample bottle. The sample bottle is supplied with a inflow of N2 gas (5L/min). A 10mm hole (circular) was drilled...

10 October 2018 3,989 0 View

Can anyone suggest a good review article on soil nutrient (major nutrients: N, Ca, Mg, K, P, S) bioavailability?

I'm looking into bioavailability mechanisms in soil. A lot has been done to understand P availability but what has been done to estimate the bioavailable pools of other nutrients?

08 August 2014 4,153 6 View

What statistical test can I use to compare time series as annual observations?

I am studying tree species effects on nutrient fluxes in forest ecosystems. I have the measurements of these nutrient fluxes under different forest stands (monospecific plantations) but I don't...

05 May 2014 5,908 0 View

What statistical test can I use to compare time series data such as the chemical composition of water in the soil?

I am studying tree species effect on soil water chemistry, I have different monospecific stands for which I have soil water chemistry measured every month from 5 replicates at 3 different depths....

05 May 2014 8,368 2 View

Does anyone know of any references on tree species effects on forest hydrology?

I am computing nutrient fluxes in the soil profile in a common garden experiment. I have for this modeled water fluxes in the different tree species stands and found differences from throughfall...

05 May 2014 9,080 3 View

Can anyone help with gapon selectivity coefficients?

I'm doing some reactive transport modeling of Ca, Mg, K, Na, Al, NH4, H in forest soils and I am looking for publications with measured Gapon exchange selectivity coefficients.

02 February 2014 8,989 2 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,...

11 November 2013 6,211 23 View