Suitability of the ESS laboratory method to determine the equilibrium soil solution composition of agricultural soils, and suggestions for simplification of the experimental procedure

2003 ◽  
Vol 166 (6) ◽  
pp. 742-749 ◽  
Author(s):  
Gunda Matschonat ◽  
Joachim Ingwersen ◽  
Thilo Streck
Keyword(s):  
Soil Solution ◽  
Agricultural Soils ◽  
Laboratory Method ◽  
Solution Composition ◽  
Experimental Procedure

Amelioration of subsurface acidity in sandy soils in low rainfall regions .2. Changes to soil solution composition following the surface application of gypsum and lime

Soil Research ◽  
1994 ◽  
Vol 32 (4) ◽  
pp. 847 ◽  
Author(s):  
CDA Mclay ◽  
GSP Ritchie ◽  
WM Porter ◽  
A Cruse
Keyword(s):  
Ionic Strength ◽  
Soil Solution ◽  
Ion Pairs ◽  
Chemical Properties ◽  
Sandy Soils ◽  
Soil Surface ◽  
Field Trials ◽  
Annual Rainfall ◽  
First Year ◽  
Solution Composition

Two field trials were sampled to investigate the changes to soil solution chemical properties of a yellow sandplain soil with an acidic subsoil following the application of gypsum and lime to the soil surface in 1989. The soils were sandy textured and located in a region of low annual rainfall (300-350 mm). Soil was sampled annually to a depth of 1 m and changes in soil solution composition were estimated by extraction of the soil with 0.005 M KCl. Gypsum leaching caused calcium (Ca), sulfate (SO4) and the ionic strength to increase substantially in both topsoil and subsoil by the end of the first year. Continued leaching in the second year caused these properties to decrease by approximately one-half in the topsoil. Gypsum appeared to have minimal effect on pH or total Al (Al-T), although the amount of Al present as toxic monomeric Al decreased and the amount present as non-toxic AlSO+4 ion pairs increased. Magnesium (Mg) was displaced from the topsoil by gypsum and leached to a lower depth in the subsoil. In contrast, lime caused pH to increase and Al to decrease substantially in the topsoil, but relatively little change to any soil solution properties was observed in the subsoil. There was an indication that more lime may have leached in the presence of gypsum in the first year after application at one site. Wheat yields were best related to the soil acidity index Al-T/EC (where EC is electrical conductivity of a 1:5 soil:water extract), although the depth at which the relationship was strongest in the subsoil varied between sites. The ratio Al-T/EC was strongly correlated with the activity of monomeric Al species (i.e. the sum of the activities of Al3+, AlOH2+ and Al(OH)+2 in the soil solution. An increase in the concentration of sulfate in the subsoil solution (which increased the ionic strength, thereby decreasing the activity of Al3+, and also increased the amount of Al present as the AlSO+4 ion pair) was probably the most important factor decreasing Al toxicity to wheat. The results indicated that gypsum could be used to increase wheat growth in aluminium toxic subsoils in sandy soils of low rainfall regions and that a simple soil test could be used to predict responses.

scholarly journals Effects of Liming on Grass Growth, Soil Solution Composition, and Microbial Activities

1987 ◽  
Vol 33 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Masayuki Hojito ◽  
Shuji Higashida ◽  
Akira Nishimune ◽  
Kinya Takao
Keyword(s):  
Soil Solution ◽  
Microbial Activities ◽  
Solution Composition ◽  
Grass Growth

Organic matter mobilization as affected by soil-solution composition and prevailing clay minerals

2002 ◽  
Vol 33 (13-14) ◽  
pp. 2291-2299 ◽  
Author(s):  
Roberto S. Martínez ◽  
Pablo Zalba ◽  
María B. Villamil ◽  
Norman Peinemann
Keyword(s):  
Organic Matter ◽  
Clay Minerals ◽  
Soil Solution ◽  
Solution Composition

Influence of plant roots on rhizosphere soil solution composition of long-term contaminated soils

Geoderma ◽  
2010 ◽  
Vol 155 (1-2) ◽  
pp. 86-92 ◽  
Author(s):  
Kwon-Rae Kim ◽  
Gary Owens ◽  
Ravi Naidu ◽  
Soon-lk Kwon
Keyword(s):  
Soil Solution ◽  
Contaminated Soils ◽  
Rhizosphere Soil ◽  
Plant Roots ◽  
Solution Composition
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