This volume includes eight chapters that provide updates in agricultural research. Chapter One elucidates utilization of refined soybean oil and the by-products from the refinery process relating to food production. Chapter Two deals with the use of single 6-benzylaminopurine spray to increase biomass accumulation in cacti. Chapter Three examines the governance efficiency of agricultural farms in Bulgaria. Chapter Four highlights the contribution of organic matter in traditional soil fertility management practices. Chapter Five addresses the potential of saponins in mycorrhizal plants for enhancing biosynthesis. Chapter Six examines the influence of arbuscular mycorrhizal fungi on growth and secondary metabolites on herbs including oregano, sage, basil, and others. Chapter Seven explicates the different aspects of soil fertility and its importance in agriculture. Lastly, Chapter Eight evaluates the extraction of polyphenols of some agro-industrial co-products with soybean oil as solvent to enhance antioxidant properties.