This book has been written with the hope that it will prove of wide usefulness as a textbook in agricultural schools and colleges; as a handy reference book for editors, publicists, and agricultural students; and as a popular treatise for farmers. It treats, in popular language, of the most important problem of modern times - the maintenance of soil productivity and the profitable use of capital and labor in agriculture - a problem worthy of much consideration by the American people in these days of high costs, diminishing agricultural exports, and increasing population.

Field management and crop rotation, as presented in this book, had their inception, so far as the author is concerned, in the class rooms of the Minnesota School of Agriculture under the tutelage of Professors Willet M. Hays and Harry Snyder. In large measure the subject matter of this book traces back to the investigational work of these men as well as to their classification of knowledge about field management and crop rotation. Furthermore, this book is the outgrowth of the author’s own experience in crop rotation investigational work at the Minnesota Agricultural Experiment Station, in teaching crop rotation and the planning of farms to students in the Minnesota School and College of Agriculture, as well as in the surveying and platting of Minnesota farms in connection with the gathering of cost statistics and farm management data by the Minnesota Agricultural Experiment Station and the United States Department of Agriculture.

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