Nanometal Oxides in Horticulture and Agronomy, a volume in the Nanomaterial-Plant Interactions series, summarizes the physiological, morphological, biochemical, and molecular regulation of metal oxide nanoparticles in plants under normal conditions as well as during different stresses. With a focus on impact and applications, it presents the latest advances in the roles of metal oxide nanoparticles in both horticulture and agriculture. Metal oxide nanoparticles have been reported as beneficial inorganic materials for the growth and development of plants, playing a protective role against the abiotic and biotic stresses. Researchers need to understand the different regulatory pathways of metal oxide nanoparticles, including their mechanisms of operation under different stressful conditions. This volume presents the physiological, morphological, biochemical, and molecular regulation of metal oxide nanoparticles in plants in normal conditions as well as during different stresses. It also discusses tolerance mechanisms and the variety of roles and applications that metal oxide nanoparticles have within plant biology. Beginning with an introductory overview to metal oxide nanomaterials, chapters discuss the effect of metal oxide nanomaterials on biochemical pathways within the plant, highlighting key applications such as fertilizers, weed control systems and pest control systems. It describes the impact of metal oxide nanoparticles in different challenging environmental conditions. Concluding with a discussion of the strengths and weaknesses of metal oxide nanoparticles in agriculture, Nanometal Oxides in Horticulture and Agronomy provides inspiration for further research and advancement. This book is an essential read for researchers and students interested in horticulture, agronomy, and plant nanomaterials.