Undoubtedly, it is previously known that Egypt has one of the oldest and most productive agricultural systems in the world. Agricultural practices such as fertilization, plant population, harvesting date, planting methods and irrigation may affect the crop growth and production under local conditions. The present book was reviewing and assembling the accumulative results of respective number of original scientific researches which conducted in the period of 2002 - 2010 at the research and agricultural experimental station, Faculty of Agriculture, Banha University, Egypt. Maize, wheat, canola, lupin, chickpea and faba bean were the investigated crops to study the impact of aforementioned field management agriculture practices on the productivity of those crops under clay soil conditions.