Agriculture, also called farming or husbandry, is the cultivation of animals, plants, fungi, and other life forms for food, fibre, biofuel and other products used to sustain human life. Statistical principles apply in all areas of experimental work and they have a very important role in agricultural experiments. The agricultural investigations are based on the application of statistical methods and procedures which are helpful in testing hypotheses using observed data, in making estimations of parameters and in predictions. The application of statistical principles and methods is necessary for effective practice in resolving the different problems that arise in the many branches of agricultural activity. Because of the variability inherent in biological and agricultural data, knowledge of statistics is necessary for their understanding and interpretation. The present book entitled is an effort to provide all comprehensive information on the subject matter and fulfil the needs of students and other agro-professionals.