The book deals with sustainable crop production of hybrids rice under changing climatic condition through agronomic manipulation based on original research information on effect of sowing times and age of seedling on different hybrids of rice in high rainfall condition. Rice major staple food more than 60 percent population of world. The higher yield of hybrids can be realized with proper management practices such age timing of sowing, transplanting of seedling different times as per monsoon. This book deals the original and scientific information agronomic manipulation particularly, sowing times and age of seedling of different hybrids rice variety. This book is important source to researchers, rice growing farmers and students in respect of scientific research information with well discussed methodology.