scholarly journals Soil Assessment along Toposequences in Rural Northern Nigeria: A Geomedical Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Lena Hartmann ◽  
Marvin Gabriel ◽  
Yuanrong Zhou ◽  
Barbara Sponholz ◽  
Heinrich Thiemeyer
Keyword(s):  
Nutrient Deficiency ◽  
Barium Chloride ◽  
West African ◽  
Soil Types ◽  
Northern Nigeria ◽  
Reference Base ◽  
World Reference Base ◽  
Normal Soil ◽  
River Valleys ◽  
Savanna Soils

Case numbers of endemic Ca-deficiency rickets (CDR) have been reported to be alarmingly rising among children of subsistence farms in developing countries within the last 30 years. Fluoride toxicities in the environment are known to not be related to the disease. To investigate if, instead, CDR is caused by a nutrient deficiency in the environment, subsistence farms in an endemic CDR area near Kaduna, northern Nigeria, were investigated for bedrock, slope forms, soil types, and soil characteristics. The natural environment was investigated according to the World Reference Base, soil texture was analysed by pipette and sieving, and plant-available macronutrients were determined using barium-chloride or Ca-acetate-lactate extraction. The analyses showed that granite and slope deposits were the dominant parent materials. The typical slope forms and soil types were Lixisols and Acrisols on pediments, Fluvisols in river valleys, and Plinthosols and Acrisols on plains. Compared with West African background values, all of the soils had normal soil textures but were low in macronutrients. Comparisons to critical limits, however, showed that only the P concentrations were critically low, which are typical for savanna soils. A link between nutrient deficiency in soils and CDR in the Kaduna area was therefore considered unlikely.

Deriving World Reference Base Reference Soil Groups from the prospective Global Soil Map product — A case study on major soil types of Africa

Geoderma ◽  
2016 ◽  
Vol 263 ◽  
pp. 226-233 ◽  
Author(s):  
Vince Láng ◽  
Márta Fuchs ◽  
Tamás Szegi ◽  
Ádám Csorba ◽  
Erika Michéli
Keyword(s):  
Soil Types ◽  
Reference Base ◽  
Soil Map ◽  
Reference Soil ◽  
Global Soil ◽  
World Reference Base ◽  
Base Reference ◽  
Soil Groups

scholarly journals The Pedogenesis of Soil Derived from Carbonate Rocks along a Climosequence in a Subtropical Mountain, China

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1044
Author(s):  
Jin Hu ◽  
En Ci ◽  
Song Li ◽  
Maoshan Lian ◽  
Shouqin Zhong
Keyword(s):  
Carbonate Rocks ◽  
Elevation Gradient ◽  
Soil Classification ◽  
Soil Types ◽  
Mean Annual Precipitation ◽  
Mean Annual Temperature ◽  
X Ray Diffraction ◽  
Soil Taxonomy ◽  
Reference Base ◽  
World Reference Base

Revealing the pedogenesis of soil on carbonate rocks is a key step in determining the boundaries of soil types along a climosequence. However, related research is lacking for a subtropical mountain. In this study, eight pedons were sampled across an elevation gradient (789–2322 m) having large variation in mean annual precipitation (MAP) (1189–1764 mm) and mean annual temperature (MAT) (5.7–14.9 °C). General processes were performed, including physical, chemical, and morphological characterizations, X-ray diffraction (XRD), total elements’ content, and soil classification of the carbonate rock. In the climo-toposequence, the illite had been transformed into illite-smectite below 1300–1500 m of elevation, 1300–1370 mm of MAP, and above 10.5–11.5 °C of MAT, and into vermiculite above this climate. These findings indicated that the effects of temperature on soil mineral transformation had weakened with the gradual increases in elevation. The pedon at 861 m of elevation, 1206 mm of MAP, and 14.5 °C of MAT, which accounted for the argic horizons, was divided into Argosols after human activities. The finding revealed that changes from forest to cultivated land could potentially accelerate the formation of argic horizons, and it provided a theoretical basis for global carbonate rocks’ weathering conditions and ecological problems in subtropical mountains. When the soils reached approximately 1100–1200 m of elevation, 1250–1300 mm of MAP, and 11.5–13.5 °C of MAT, the argic horizons of the soil could be accounted for, as evolved from the Cambosols in Chinese Soil Taxonomy (CST) (Inceptisols in Soil Taxonomy (ST), Cambisols in the World Reference Base for Soil Resources (WRB)) to the Argosols in CST (Alfisols in ST, Luvisols or Alisols in WRB) under natural vegetation. Therefore, it was indicated that the soil types changed significantly in the CST, ST, and WRB with increases of MAP and decreases of MAT, which provides a reference for determining the boundaries of the soil types along a climosequence in subtropical mountains.

scholarly journals Conversion of some soil types, subtypes, and varieties between the Taxonomic Classification System of Soils of the Czech Republic and the World Reference Base for Soil Resources

2010 ◽  
Vol 5 (No. 4) ◽  
pp. 172-185
Author(s):  
J. Sládková
Keyword(s):  
Czech Republic ◽  
Classification System ◽  
Agricultural Soils ◽  
Soil Classification ◽  
Soil Survey ◽  
Soil Types ◽  
Soil Resources ◽  
The Czech Republic ◽  
Reference Base ◽  
World Reference Base

The article illustrates the compatibility of the Czech Republic Taxonomic Soil Classification System validated in the CR with the international World Reference Base for Soil Resources. It utilises the archive data on the soil types, subtypes, and varieties from the General survey of agricultural soils in the Czech Republic and soil profiles from new soil survey on the pilot area of Litoměřice district. It indicates the possibilities of the future refinement of both systems.

Possibilities for integrating Hungarian legacy soil data into international databases

2012 ◽  
Vol 61 (2) ◽  
pp. 263-276
Author(s):  
István Waltner ◽  
Márta Fuchs ◽  
Erika Michéli ◽  
Vince Láng
Keyword(s):  
Soil Resources ◽  
Reference Base ◽  
World Reference Base

A tanulmány célja az volt, hogy felmérje a legnagyobb hazai területi lefedettséggel rendelkező, túlnyomóan archív adatokat tartalmazó talajtani adatbázisok harmonizációs lehetőségeit nemzetközi adatbázisokkal. A cikk fókuszában a Világ Talaj Referenciabázis (World Reference Base for Soil Resources, WRB) rendszere által meghatározott követelmények állnak, mivel számos modern adatbázis talajadat-struktúrája igyekszik alkalmazkodni annak követelményeihez. Négy kiválasztott adatbázison vizsgáltuk, hogy a rendelkezésre álló adatok alapján lehetséges-e meghatározni alapvető, a hazánk környezeti viszonyai között előforduló WRB egységeket. Mindegyik adatbázis saját módszertanából kiindulva egyszerűsített algoritmusokat hoztunk létre, hogy a lehető legtöbb archív információ hasznosuljon. Az eredmények alapján látható, hogy a WRB rendszerét adoptáló adatbázisokba a hazai archív talajadatok korlátozott mértékben ugyan, de beilleszthetőek. Megfigyelhető továbbá, hogy míg az egyes archív adatbázisok önmagukban csupán korlátozott információt nyújtanak a WRB számára, kombinációjukkal ez az információhiány jelentősen csökkenthető.

Anticipated Developments of the World Reference Base for Soil Resources

2002 ◽  
pp. 245-256 ◽  
Author(s):  
Jozef Deckers ◽  
Paul Driessen ◽  
Freddy O.F. Nachtergaele ◽  
Otto Spaargaren ◽  
Frank Berding
Keyword(s):  
Soil Resources ◽  
Reference Base ◽  
The World ◽  
World Reference Base

scholarly journals Characterization, classification and suitability evaluation of soils under sugarcane (Saccharum officinarum L.) cultivation at the Sugar Research Farm, University of Ilorin, Nigeria

Agro-Science ◽  
2021 ◽  
Vol 20 (3) ◽  
pp. 14-23
Author(s):  
O.N. Ajala ◽  
T.A. Adjadeh ◽  
J.O. Olaniyan ◽  
T.O. Isimikalu ◽  
E.K. Nartey ◽  
...  
Keyword(s):  
Sandy Loam ◽  
Saccharum Officinarum ◽  
Exchange Capacity ◽  
Clay Loam ◽  
Soil Taxonomy ◽  
Reference Base ◽  
Suitability Evaluation ◽  
Reconnaissance Survey ◽  
World Reference Base ◽  
The University

A reconnaissance survey conducted at the University of Ilorin Sugar Research Farm (USRF) revealed four dominant soils at Site 1 (USRF1) and one at Site 2 (USRF2). The soils were characterized and classified according to both the Soil Taxonomy (ST) and the World Reference Base for Soil Resources (WRB). Also, the suitability of the soils for sugarcane cultivation was evaluated using the limitation approach. While the USRF1 soils were reddish, the USRF2 soil was greyish due to poor drainage. The USRF1 soils were loamy sand with the AB-horizons of pedons II and III being gravelly. Pedon V had sandy loam surface, sandy clay loam subsurface and clay loam subsoil. The USRF1 soils were moderately acid while the USRF2 soil was slightly acid to slightly alkaline. Exchangeable calcium (Ca2+) content of the USRF2 soil which averaged 4.00 cmolc kg–1 was 2-3 times higher than that of the USRF1 soils. The USRF2 soil also contained higher Mg2+, K+ and Na+, 2-3 folds higher effective cation exchange capacity and > 10 folds higher soil organic carbon (with mean of 11.60 g kg–1) and total nitrogen (mean of 0.94 g kg–1). Under ST, pedons I and IV classified as Typic Haplustepts, II and III as Lithic Haplustepts and V as a Kanhaplic Haplustalf. Under WRB, pedons I and IV classified as Eutric Regosols (arenic), II and III as Endo-pisoplinthic Cambisols (arenic) and V as a Gleyic Lixisol (loamic). Pedon V was highly suitable (85.25%), I and IV moderately suitable (64.53%), II marginally suitable (47.40%) and III unsuitable (35.62%) for sugarcane cultivation.

scholarly journals Hét vulkáni kőzeten kialakult talajszelvény morfológiai és diagnosztikai jellemzői a hazai genetikai talajosztályozás és a WRB (World Reference Base for Soil Resources, 1998) szerint

2006 ◽  
Vol 55 (2) ◽  
pp. 347-366 ◽  
Author(s):  
Olga Fehér ◽  
György Füleky ◽  
Balázs Madarász ◽  
Ádám Kertész
Keyword(s):  
Soil Resources ◽  
Reference Base ◽  
World Reference Base

Az európai vulkáni rendszerek talajerőforrásait feltérképező COST 622 projekt keretében vizsgáltuk a belső-kárpáti vulkáni vonulat hazánk területére eső, vulkáni kőzeteken képződött talajait. A vulkáni kőzetet létrehozó vulkánosság jellege alapján (mészalkáli: savanyú és intermedier, illetve alkálibazalt vulkánosság) hét mintaterületet jelöltünk ki. A vizsgált talajok genetikai szintjein részletes makro- és mikromorfológiai, kémiai és fizikai vizsgálatokat végeztünk. Vizsgálataink célja a diagnosztikai bélyegek (WRB, 1998) és a részletes morfológiai megfigyelések összehasonlítása volt. Diagnosztikai tulajdonságok alapján a legváltozatosabb talajnak a fekete nyirok bizonyult, mely a mintaterületek talajnedvesség-forgalmi és mikro-klimatikus különbségei alapján Phaeozem-ként (Badacsony, Tihany), Cambisol-ként (Andornaktálya) és Luvisol-ként (Tolcsva) került besorolásra. Valamennyi vizsgált mintaterületen morfológiai és kémiai tulajdonságok alapján aktív és inaktív folyamatokra utaló bélyegeket diagnosztizáltunk. A múltban végbement folyamatokra utalnak a geliszolflukciós transzport bélyegei és az igen erős fagyhatásra képződött pszeudohomok-szemcsék. Aktív folyamatoknak tekinthető: a humuszosodás, intenzív mállás és agyagosodás, kilúgzás és az agyagvándorlás. Galyatető esetében a periglaciális fagyaprózódásból keletkezett finom por intenzív kémiai mállását, amorfkolloid képződését sikerült detektálni.

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