Marcus Hardie

11 Questions 20 Answers 0 Followers

Questions related from Marcus Hardie

Science quality in soil physics ?

I lecture in Soil Physics, one of the issues I face is that we teach a very knowledge based curriculum, in which critical thinking and applied thinking and knowledge to problem solving is rare and...

11 November 2018 8,446 3 View

New soil sensors ?

Im interested in learning about the development of new soil sensors either in soil or mobile sensors. Im interested in sensors that measure either chemical, physical or biological soil properties....

03 March 2018 8,667 5 View

Does anyone know of the processes or mechanisms by which ultrasonic vibration causes aggregates to break down?

Why does ultrasonic disaggregation causes greater disaggregation in some soils than others compared to wet sieving?

08 August 2014 6,635 2 View

Does anybody know a good open access journal in soil science?

Im looking for a quality open acess journal in soil science to publish a review of organic matter. Can you recommend an appropriate journal, preferably with a citation index?

02 February 2014 2,487 13 View

Can you recommend literature on nutrient leaching in apple orchards?

Im looking for literature on potassium and phosphate leaching in apple orchards. I have papers by Neilsen 1985 and Siczek 2008, but I'm really looking for something more substantial, either...

11 November 2013 8,341 3 View

Kd factors for brilliant blue dye tracer (HYDRUS) - can anyone help?

I'm trying to model movement of brilliant blue dye tracer from drip irrigation in HYRUS 2D. I'm looking for any published values of Kd and lateral and vertical transmisivity etc. Alternatively any...

09 September 2013 6,965 1 View

Can anyone suggest an appropriate model for estimating nitrous oxide emissions from agricultural soils at either an hourly or daily time step?

I'm looking for a model that will use hourly climate data, soil moisture, temperature etc to estimate N20 flux from a agricultural field site. Any suggestions?

08 August 2013 7,284 4 View

Surface drip irrigation in Hydrus 2d?

I need to simulate a surface drip irrigation in Hydrus. I applied 2.4 litres in 40 minutes or 3.6 litres per hour. My node spacing at the soil surface is 5 cm. I have an atmospheric boundary. If...

08 August 2013 8,359 2 View

Can someone suggest where to purchase a ceramic suction plate / table for hanging water column?

I am looking to purchase a ceramic suction plate / table. Im not after a pressure chamber plate, but a plate mounted in clear plastic to which I can set up a hanging column and measure to soil...

07 July 2013 5,610 1 View

How do you measure aggregate stability and dispersion?

I'm interested in learning the breadth of methods used to measure aggregate stability and dispersion. I frequently use methods such as wet aggregate stability (using 1-2 mm aggregates moving up...

06 June 2013 3,126 9 View

What is meant by the available water holding capacity of a soil?

This seemingly simple question hides some complexity, i had always considered that it referred to the water content at field capacity, which I assume to equal the soil retained in an intact core...

05 May 2013 6,922 4 View