Nguemezi C, Tematio P, Yemefack M, Tsozue D, Silatsa T B F
University of Dschang, Faculty of Science, Department of Earth Science, P.O.Box. 67, Dschang, Cameroon.
International Institute of Tropical Agriculture (IITA), Nkolbisson, P.O.Box 2008 (Messa), Yaoundé, Cameroon.
Heliyon. 2020 Feb 27;6(2):e03432. doi: 10.1016/j.heliyon.2020.e03432. eCollection 2020 Feb.
Among the greatest challenges of Sub-Saharan Africa is the need for more crop production for supplying the increasing demand of its growing population. For this purpose, knowledge on soil resources and their agricultural potentials is important for defining proper and appropriate land use and management. We thus investigated on the status of soil fertility in Tombel area, in order to produce such knowledge through understanding and monitoring the impact of physicochemical properties of soil. Diverse analyses performed on various datasets demonstrated the direct impact of physicochemical properties of soil and derived soil fertility parameters on major constraints for plant growth and optimal crop production such as water retention capacity, roots development, soils aeration, nutrients availability, nutrients abundance and cations balance. Based on physicochemical soil properties, fertility parameters and Soil Quality Index (SQI), four soil fertility classes were identified in the area: (i) very good fertility soils (66 km) that corresponds to () above 500m ; (ii) good fertility soils (506 km), grouping below 500m and (iii) fairly good fertile soils (787 km) including and poorly fertile soils (375 km) including and The principal indicators controlling soil quality in the Tombel area as derived from ANOVA and PCA analyses, are: Ca, Mg, pH water, organic matter (OM), available P, total Nitrogen and CEC. Four of the seven indicators (Ca, pH, OM, P) were also identified as important indicators for assessing the fertility status of the different soils groups in the Tombel area.
撒哈拉以南非洲面临的最大挑战之一是需要增加作物产量，以满足其不断增长的人口日益增长的需求。为此，了解土壤资源及其农业潜力对于确定适当的土地利用和管理至关重要。因此，我们对通贝地区的土壤肥力状况进行了调查，以便通过了解和监测土壤物理化学性质的影响来获取此类知识。对各种数据集进行的多种分析表明，土壤物理化学性质和衍生的土壤肥力参数对植物生长和最佳作物生产的主要限制因素有直接影响，如保水能力、根系发育、土壤通气性、养分有效性、养分丰度和阳离子平衡。根据土壤物理化学性质、肥力参数和土壤质量指数（SQI），该地区确定了四个土壤肥力等级：（i）非常肥沃的土壤（66平方公里），对应于海拔500米以上的区域；（ii）肥沃的土壤（506平方公里），包括海拔500米以下的区域；（iii）肥力相当好的土壤（787平方公里），包括某些区域；以及（iv）肥力差的土壤（375平方公里），包括某些区域。方差分析（ANOVA）和主成分分析（PCA）得出的控制通贝地区土壤质量的主要指标是：钙、镁、水的pH值、有机质（OM）、有效磷、总氮和阳离子交换量（CEC）。七个指标中的四个（钙、pH值、有机质、磷）也被确定为评估通贝地区不同土壤组肥力状况的重要指标。
