Böcker av Ukoh Ikpe Patrick

Two pedons on three different topographical positions (summit, shoulder and foot slope) on a toposequence were studied at Dundaye District, Sokoto State. The Summit was on relatively flatland with an elevation of 283m above sea level. It is located on latitude 130 071 N and long. 050131E. Shoulder was a gently slopy land with an elevation of 271m above sea level. It is situated on latitude 130 071 N and long. 050 141E, while foot slope was on a low land with an elevation of 262m above sea level. It is located on latitude 130141N and long. 050131E. Morphological properties of the soils revealed that soils of the upper slope were shallow and perfectly drained and were generally sandy in texture. Those on shoulder were deep and well drained while those at the foot slope have subangular blocky structure with evidence of biological activities at the surface. Physical properties of the soils indicate a relatively high bulk density and high porosity. The dominant exchangeable bases were Ca and Na. The soils were slightly acid in reaction with pH range of 5.3 to 5.4,5.2 to 5.4, 6.5 to 6.7. Organic matter content of the soils was generally low range from 0.33 to 0.37,0.08 to 0.16 and 0.88 to 0.93. The soils were rated low in nitrogen. The results of available phosphorus show an irregular distribution in the profiles. The soils were rated having very low available phosphorus. The soils were low in cation exchange capacity with high base saturation status. The soils were classified using the USDA soil Taxonomy system in which soils of the summit were classified as Typic Haplustepts, those of the shoulder as Vermic Ustorthents and those of the foot slope as Typic Endoaquents.

Il suolo è senza dubbio la risorsa naturale più preziosa e affidabile, ma non è rinnovabile nel tempo e quindi deve essere gestito per massimizzarne la conservazione e la produttività per nutrire la popolazione. Il presente libro analizza la caratterizzazione e la classificazione del suolo lungo una toposequenza e le sue implicazioni sulle attività agricole nel distretto di Dundaye, a Sokoto, in Nigeria. I suoli sono stati classificati con un livello di fosforo disponibile molto basso. I terreni avevano una bassa capacità di scambio cationico e un elevato stato di saturazione della base. I suoli sono stati classificati utilizzando il sistema di tassonomia dei suoli dell'USDA, in cui i suoli della sommità sono stati classificati come Typic Haplustepts, quelli della spalla come Vermic Ustorthents e quelli della scarpata come Typic Endoaquents, che si correlavano con Ruptic Cambisols, Eutric Fluvisols e Eutric Gleysols nel sistema di classificazione WRB.

Der Boden ist zweifellos die wertvollste und verlässlichste natürliche Ressource, aber er ist in menschlicher Zeit nicht erneuerbar und muss daher so bewirtschaftet werden, dass seine Erhaltung und Produktivität zur Ernährung der Bevölkerung maximiert wird. Dieses Buch beschreibt die Charakterisierung und Klassifizierung von Böden entlang einer Toposequenz und ihre Auswirkungen auf landwirtschaftliche Aktivitäten im Dundaye-Distrikt in Sokoto, Nigeria. Die Böden wiesen einen sehr niedrigen Gehalt an verfügbarem Phosphor auf. Die Böden wiesen eine geringe Kationenaustauschkapazität und eine hohe Basensättigung auf. Die Böden wurden anhand des USDA-Bodentaxonomiesystems klassifiziert, in dem die Böden des Gipfels als typische Haplustepts, die der Schulter als vermische Ustorthents und die des Fußabhangs als typische Endoaquents eingestuft wurden, die mit den Ruptic Cambisols, Eutric Fluvisols und Eutric Gleysols des WRB-Klassifikationssystems korrelierten.

O solo é, sem dúvida, o recurso natural mais valioso e fiável, mas não é renovável em tempo humano, pelo que tem de ser gerido de forma a maximizar a sua conservação e produtividade para alimentar a população. Este livro caracteriza e classifica o solo ao longo de uma toposequência e as suas implicações nas actividades agrícolas no distrito de Dundaye, Sokoto, Nigéria. Os solos foram classificados como tendo muito pouco fósforo disponível. Os solos apresentavam uma baixa capacidade de troca catiónica com um elevado estado de saturação de bases. Os solos foram classificados utilizando o sistema de taxonomia de solos do USDA, no qual os solos do cume foram classificados como Typic Haplustepts, os do ombro como Vermic Ustorthents e os da encosta do sopé como Typic Endoaquents, que se correlacionavam com Ruptic Cambisols, Eutric Fluvisols e Eutric Gleysols no sistema de classificação WRB.