Soils and fertilizers . D FERTILIZERS €ift 3^ural Ecit-33ooit Series Edited bt L. H. BAILEYCarleton, The Shall M. Duggar, Plant Physiology, with special reference to Plant F. Duggar, Southekn Field , The Breeds op , The Principles and Practice of Judging , The Principles of Plant Cultdre, , Animal Hcsbandry for and Stewart, The Principles of , A Text-Book op , Text-Book of Land , The Feeding op Animals, , Field Crop , Soils
Soils and fertilizers . D FERTILIZERS €ift 3^ural Ecit-33ooit Series Edited bt L. H. BAILEYCarleton, The Shall M. Duggar, Plant Physiology, with special reference to Plant F. Duggar, Southekn Field , The Breeds op , The Principles and Practice of Judging , The Principles of Plant Cultdre, , Animal Hcsbandry for and Stewart, The Principles of , A Text-Book op , Text-Book of Land , The Feeding op Animals, , Field Crop , Soils and ^on, Pippin and Buckman, Soils — Tbeib Properties and , Beginnings in , The Corn , Field Crops foe the , The Breeding of , Forage Plants and their , Elements of , Farm , Manures and , Principles of , Principles of Irrigation Plate I. The earth is perhaps a stern earth, but it is a kindlyearth. — Bailey. SOILS AND FERTILIZERS BYT. LYTTLETON LYON PBOFESSOR OP SOIL TECHNOLOGY IN THE NEW YORK STATE COLLEGE OF AGRIC0LTDBE AT COSNELL UNITBBSIXr TgtfB g0rft THE MACMILLAN COMPANY 1918 All riglUt raerved CoPTBiaHT, 191T, bt the macmillan company. Set up and electrotTped. Published August, 1917. Kotfoaaa Jfittt* J. S. Oushing: Co. — Berwick & Smith Co. Norwood, MsBB., PREFACE In many of the high schools and other secondary schoolsinto which instruction in agriculture was introduced a fewyears ago there has been such a development of the subjectthat one general text is no longer adequate. In these schoolssome of the more important phases of the subject now re-ceive a degree of attention that calls for speciaUzed is particularly true of the secondary agricultural schoolsand the normal schools. It was with the hope of meetingthis need, and also of contributing to the deman
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