xvi. CONTENTS 



of Weeds.— 321. • The Cost of Insects.— 322. The Loss 

 from Rust.— 323. The Amount Hail Takes from the Pro- 

 fits.— 324. The Moral.— 325. The Cost of Production 

 and the Selling Price.— 326. The State's Third of the Prob- 

 lem — that of a Permanent Agriculture. — -327. Factors 

 that Affect Permanence. — 328. The Means at Man's Dis- 

 posal for Controlling or Influencing the Factors of 

 Growth, Profit and Permanence. — 329. The Choice of 

 Suitable Crops. — 330. Suitable Crop Management Prac- 

 tices. — 331. The Improvement of Crops. — 332. Irriga- 

 tion and Drainage 333. Tillage. — 334. Crop Rotations. 



335. Crop Rotations and Live Stock. — 336. Business 

 Farming. — 337. Legumes and Inoculation. — 338. The 

 Use of Manures. — 339. In Conclusion. 



