01 January 2018 4 10K Report

I am looking for textbooks, technical guides, reference material about irrigation and water management.

More Thomas Fungenzi's questions See All
Have you ever converted soil texture into a one-dimension value?

Soil texture, determined by the measurement of particle size distribution, introduces three variables to create texture classes. However, if we forget about the three fractions (clay, silt and...

06 July 2019 9,192 11 View

How the boundaries between the soil mineral particles (i.e., sand, silt and clay) have been defined?

Particle size distribution (PSD) aka soil texture is a major feature to understand soils. Sand, silt and clay classes of mineral particles are so commonly used that they become part of the...

05 June 2019 9,214 12 View

Has someone ever developped a simple relationship between annual rainfall, annual average temperature and soil organic matter or carbon?

The mineralisation rates or soil organic matter are influenced by temperature and moisture. I am trying to classify climates, using associations between cumulated annual rainfall and annual...

05 June 2019 816 15 View

Could you recommend publicly available time series datasets on soils (large!)?

I am looking for large datasets including information on soils (texture, depths, carbon , etc.) and their location (GPS coordinates or climates data). Any suggestions? Any large studies which...

05 June 2019 7,923 9 View

Is there an acceptable way to convert soil carbon concentration values for a certain depth to another (for 0-20cm to 0-10cm)?

I am trying to compare soil carbon concentrations from different studies. The problem is that most of them use different sampling depths: 0-10cm 0-15cm 0-20cm 0-30cm ... Is there an acceptable...

04 May 2019 3,236 10 View

How much biomass is produced in average by the main crops?

I am looking for values comparing the yields (potential and or average), net primary production, amount of residues for the main crops over the world, ... anything related to the amount of...

03 April 2019 8,312 13 View

How fast can soil organic matter decompose under tropical climates?

I am interested in the range of mineralization rates of soil organic matter mineralization in tropical settings. How fast can SOM be depleted? Under temperate climates we are often talking about...

03 April 2019 7,022 5 View

What is the biochemical composition of cocoa leaves?

Dear colleagues, I am looking for information on the average biochemical profile of cocoa leaves: % of cellulose % of hemicellulose % of lignin % solubles % ash/mineral ... etc If you also...

31 December 2018 865 6 View

How to pack soil samples for soil microbial biomass analysis? How sensitive are soil biological parameters to transportation?

Hello, I am wondering about the sensitivity of soils during transportation. Imagine you want to measure soil microbial biomass using chloroform fumigation extraction, how consistent will be the...

10 November 2018 7,940 8 View

How to conserve and send soil samples for (biological) analysis on the other side of the world?

Hi, I would like to perform a range of soil analyses on samples collected in Indonesia. The analyses must be done in the UK... I was considering soil biological analyses such soil microbial...

08 September 2018 5,903 3 View

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Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...

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