Impact of climate change on agriculture is one of the major areas for scientific research to make out its dimensions and mitigation strategies for sustainable agriculture. The government agencies and departments, planners, policy makers and international donor agencies are funding for research and documentation on it. This edited book gives an overview of scholarly work on dimensions of climate change and its mitigation strategies for sustainability of agriculture. This edited book is presented in two volumes. The Volume I presents the scholarly work on understandings of indicators of climate change; drought characteristics for water resources planning and management; mulches for enhancing agricultural productivity; influence of nitrogen and irrigation levels on methane gas emission; greenhouse gases and its mitigation approach; soil physio-chemical and microbial dynamics; greenhouse gas impact on ecosystem; carbon sequestration and farming system; role of microorganisms in climatic change; green house gases emission and fertilizer management; nanotechnology; silicon regulation for induction of defense response; remote sensing based drought monitoring; and remote sensing and GIS in management of recurrent flood prone crop land.