V. Limed and Unlimed Ends of a Plot at the Ohio Experiment Station 16 VI. Effect of Finely Pulverized Limestone on Clover in a Soil having a Lime Requirement of 5,200 Pounds of Limestone per Acre, at the Pennsylvania Experiment Station 17 VII. Lime Favors Clover at the Ohio Experiment Station 24 VIII. Lime Affects Growth of Corn at the Ohio Experiment Station 25 IX. An Indiana Limestone Quarry 32 X. A Limestone Plant 33 (Courtesy of the Michigan Limestone Company.) XI. A Limestone Pulverizer for Farm Use 38 (Courtesy of the Jeffrey Manufacturing Company, Columbus, Ohio.) XII. A Lime Pulver in Operation 39 (Courtesy of the Jeffrey Manufacturing Company.) XIII. Laying Foundation for a Lime Stack at the Pennsylvania Experiment Station 48 XIV. A Stack nearly Completed at the Pennsylvania Experiment Station 49 XV. Effect of Excessive Use of Burned Lime without Manure at the Pennsylvania Experiment Station 52 XVI. A Hydrated Lime Plant 53 (Courtesy of the Palmer Lime and Cement Company, York, Pa.) XVII. Filling the Lime Spreader at the Ohio Experiment Station 78 XVIII. Lime Distributors 79 XIX. Remarkable Effect of Lime on Sweet Clover at the Ohio Experiment Station 86 XX. Sweet Clover Thrives When Lime and Manure are Supplied, Ohio Experiment Station 87 * * * * * CHAPTER 1 INTRODUCTION