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Questions related from Thomas Fungenzi
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...
07 July 2019 9,127 11 View
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...
06 June 2019 7,860 9 View
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...
06 June 2019 766 15 View
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...
06 June 2019 9,117 12 View
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...
05 May 2019 3,178 10 View
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...
04 April 2019 8,264 13 View
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...
04 April 2019 6,958 5 View
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...
01 January 2019 789 6 View
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...
11 November 2018 7,875 8 View
I am currently undertaking a study on long-term soil fertility changes and organic matter dynamics in cocoa plantations. I would like to study the effect of organic amendments and fertilizers on...
09 September 2018 1,954 8 View
I am interested in the contribution of root exudates in soil processes. What is the recommended procedure to measure the magnitude of root exudates production (the quantity over a certain...
09 September 2018 8,358 6 View
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...
09 September 2018 5,838 3 View
Hi, I'm interested in tools use to predict the yield of cocoa farms. It seem to me that little is known on cocoa productivity. Pod production seems to be highly linked to rainfall. The success of...
09 September 2018 8,929 3 View
I am beginning a PhD on soil organic dynamics in cocoa plantations. Could you recommend interesting variables to study the quality of soil organic matter and its changes over time? Quantity is the...
09 September 2018 7,965 5 View
I am looking for k2 values: "humus annual decomposition rates" for tropical (cocoa) conditions, in Indonesia. I would like to use them for a simple Hénin-Dupuis modeling experiment on soil...
07 July 2018 6,846 5 View
I am looking for k1 isohumic coefficient values, for tropical (cocoa) conditions, in Indonesia. I would like to use them for a simple Hénin-Dupuis modeling experiment on soil organic matter...
07 July 2018 1,686 4 View
"The C/N ratio of soils is about 10–12:1." ( Donald L. Sparks, in Environmental Soil Chemistry (Second Edition), 2003) I know, the wording of my question is very strange, but that is to provoke...
07 July 2018 4,505 27 View
I looking for reliable meteorological information about Indonesia. More specifically: monthly precipitations and mean temperatures, at the regional level or lower.
07 July 2018 2,596 8 View
I would like to relay the article written by Oldfield et al. (2015): How much SOM is needed for sustainable agriculture? December 2015 - Frontiers in Ecology and the Environment...
06 June 2018 7,167 7 View
What are the preferences of Coffee Arabica regarding soil pH, texture, nutrient levels, etc ? Does a soil pH of 3.5 - 4.5 is low for coffee production ? Should it be corrected ?
04 April 2018 8,275 5 View
I have been looking for a while for a PhD in soil science and agronomy, but all my attempts have been unsuccessful... One of my difficulty is that I don't have any published material. Apparently...
03 March 2018 2,084 7 View
I guess there are many, but could you cite some serious or replicable ones? Assuming that the area is totally unknown (no existing soil maps, no help from the farmers)...
03 March 2018 2,012 2 View
I often hear that soil types have an inherent fertility. They are often compared : "this soil type is very fertile, while this one is less"... However, it seems to me that local conditions may...
03 March 2018 3,331 3 View
I am doing some literature review to better understand the processes governing the biological fixation of nitrogen by non-symbiotic micro-organisms (associative, endophytic, free-living...). I am...
02 February 2018 4,138 20 View
I am looking for textbooks, technical guides, reference material about irrigation and water management.
01 January 2018 9,537 4 View
I would like to know what is the significance of symbiotic relationships in plant nutrition. Do we have evidences suggesting that symbioses have a significant potential to improve crop yields and...
12 December 2017 3,106 10 View
Hi, I have heard many times that : With no-till, organic matter content tend to be higher than in conventional systems. And that : With no-till, mineralization rates are lower tend to be lower...
12 December 2017 3,048 7 View
I have been taught humus categories (mull, moder, mor) when we were talking of forest soils, but does this classification applies to agricultural soils for example?As agricultural soil can be...
10 October 2017 8,151 16 View
I am looking for an explanation about the relation between soil fertility and the nature of the bedrock.There is plenty of literature about pedogenesis, but I would like to go a step further and...
09 September 2017 3,383 25 View
I am seeking for great examples of e-learning trainings and courses in conservation agriculture, especially about soil management practices. Do not hesitate to share links and material. Cheers,-...
05 May 2017 3,405 4 View
You may have heard about Haney's method to measure the emission of CO2 after drying /rewetting soil.Which advantages and limitations could you highlight?Any experiences using this respiration test?
07 July 2015 2,123 0 View
These two measurements become more popular. However, are there any studies that relate higher biomass and/or respiration to higher yield and better quality of crops?Or even better, to higher...
06 June 2015 6,762 28 View
