Soil is an important factor in crop production and its degradation is one of the limiting factors for sustainable agriculture. Acidification of soil is a natural process with major ramifications on plant growth. As soils become more acid, it becomes increasingly difficult to produce food crops. As soil pH declines, the supply of most plant nutrients decreases while aluminum and a few micronutrients become more soluble and toxic to plants. These problems are particularly acute in humid tropical regions that have been highly weathered. This book is based on field experiment conducted in Sodo Zuria Woreda, Ethiopia ; on Nitisol loam soil with an inherent property of high P-fixation and acidty to study the influence of Phosphorus fertilizer application and liming on nutrient uptake nodulation and yield of haricot bean (Phaseoulus vulgaris).In this book, the effects of the treatments have been thoroughly analyzed and discussed.So this book could be referred by researchers to find out scientific explanations of soil acidity problems and its solution and adoption of the methodologies somewhere else.