摘要
The author of this book has travelled extensively in many desert and semi-desert territories of the U. S. S. R., Morocco, Tunisia, the Egyptian region of the U. A. R., Pakistan and India where he realised the importance of water for the reclamation of vast, areas of arid and semi-arid lands. During his visits the author became acquainted with the theory and practice of land irrigation in many countries of North Africa and Asia.