This book is mainly intended for the agricultural courses of graduate students in the field of agriculture, and horticulture. Semester system of education of B.Sc.(Ag.), and B.Sc. (Horti.), students are quite dynamic for which the students are to be helped for changeover. We can identify their difficulties for comprehensation of language, non-availability of textbooks for their semester system. There is a need to use simple language. The present book titled ...