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Questions related from Louadj Yacine
EC e is time consuming but yet its the reference method when assessing the soil salinity of soil, i wonder if there any empirical equation linking the EC e , EC 1:5 and Soil texture? thank you...
04 April 2017 1,250 9 View
Calcium carbonate is one of the cementing agent the participate in the binding of soil particles together through physico-chemical mechanisms and presumbly create a stable soil structure . i want...
12 December 2016 6,693 19 View
i want to assess the hydraulic conductivity ( saturated and unsaturated) in the field through diffrent horizon in the vertical and the horizontal direction. how can i proceed to compute an...
12 December 2016 2,235 4 View
1. are these three type of crusts relate to each other ? or their developement is governed by a different Mechanisms?. 2. How can we recognize them in the fields? Kind regards Yacine Louadj
12 December 2016 8,701 1 View
Regression analysis is a common way to discover a relationship between dependent and explanatory variables. However, this statistical relationship does not mean that the explanatory variables...
08 August 2016 3,561 6 View
I have run an experiment where i measure different soil properties along a transect ( Bulk density, porosity, EC, pH, CaCO3). the sample size is 16. and i want to evaluate the spatial dependance...
05 May 2016 6,797 5 View
My guess is " the former deal with only the state of surface of the soil but the later deal with the process that degrade the physical , chemical and biological properties of a given soil"
05 May 2016 591 7 View
this question has come to mind after reading this quote by Sir George Stapledon «The soil must be man's most treasured possession; so he who tends the soil wiselyand with care is assuredly the...
05 May 2016 6,511 3 View
i want to know the scientific or historic reason for this norm.
05 May 2016 8,319 10 View
the First and obvious one in science, is to search for causality either in deterministic or mechanistic way; the other is to describe nature in term of probability or stochastic manner. is there...
05 May 2016 6,718 12 View
Algeria ( my home country) is a country that had roughly 2 millions square kilometer of desert, and we want to classify and map these soils using satellites images ( orthorectified).
04 April 2016 5,599 7 View
it usually said that iron deficiency in plant ( chlorosis) is usally found in calcareous soils , i wonder if this is the only cause , and if so , what is the threshold expressed in carbonate...
04 April 2016 9,601 14 View
i want to incorporate in my research project on the distribution of salt affected soil a DEM , because there is a intime relationship between landform and salt distribution.
04 April 2016 8,256 7 View
i want to know if measuring these cation using electro-chemical methods give a reliable results, and if there is a protocol of how to use these techniques in Soil chemical analysis?
04 April 2016 7,710 4 View
One of the main factor that contribute to soil aggregation is calcium carbonate. How is that even whith high calcium carbonate in sodic soil, we still have poor physical quality ?
04 April 2016 9,484 12 View
one of the fascinating debate between geology and pedology is about the origine of secondary carbonates in the soil
01 January 2016 9,901 1 View
by sodic conditions , i mean , a soil in equilibrium withe differents salt solutions which has a different SAR ranging from 0 to 30 and different EC from 2 dS/m to 16 dS/m.
05 May 2015 4,510 2 View
the acid attack in carbonate analysis produce Co2 gaz which may comme from the oxidation of organic matter, so i was wondering if the FeSo4 can eliminate this oxidation and by which mechanism it...
04 April 2015 7,459 8 View
I was wondering whether the calcite is linked with the clay fraction and in the procedure of decalcification, there will be a loss of clay content.
03 March 2015 8,481 7 View
The mechanism by which the degradation of soil structure in sodic soil occurs are the swelling of the clays and the dispersion of the colloids, and the classic approach to improve the soil...
03 March 2015 9,533 9 View
i am using the Acetone method which is based upon the selective precipitation of gypsum of Acetone, i am wondering whether acetone didn't precipate other salt?
01 January 2015 4,298 5 View
According to McNeal and Reeve ( 1964) who are the first to re-apraise the measurement of Ks in laboratory , they suggest to modified permeameter which take into account the flow of water from the...
01 January 2015 285 9 View
I want also to have the paper made and published by walkley and black in journal of soil science, if anyone of you have access?
11 November 2014 3,005 3 View
