ILLUSTRATIONS 



PLATES. 



Page. 

 Plate I. Nopal cardon {Opuntia utreptacantha Lehm. ), the most important of 



the Mexican prickly pears 14 



II. Fig. 1. — View across the lower end of the McDonald farm, showing 

 the buildings, the dwelling house being partially concealed in the 

 trees. Fig. 2. — View across the upper end of the farm, showing 

 the st<iny nature of the land in the pasture, the present condition 

 of the hay land, and the location of the mill pond 20 



III. Fig. 1. — Cuttings of Peruvian alfalfa before and after rooting. Fig. 



2. — Cuttings of Peruvian alfalfa rooted in sand in greenhouse 34 



IV. Fig. 1. — Potted cuttings of Peruvian alfalfa in greenhouse. . Fig. 2. — 



Potted cuttings of Peruvian alfalfa in cold frames 34 



V. Fig. 1. — Rooted cuttings of Peruvian alfalfa ready for transplanting 

 to permanent nursery rows. Fig. 2.— Plants from cuttings of Peru- 

 vian alfalfa in permanent nursery rows 34 



VI. . Plant of ]l<jiia caljany ( Burm. ) Walp • 54 



VII. Plant of Vigna unguiculata ( L. ) Walp 54 



VIII. Pods of cowpeas. A. — Vigim unguiculata. B. — Vigna catjang. 



( Natural size ) 54 



TEXT FIGURES. 



Fig. 1. Plan of farm as submitted by the manager for the recommendation 



of a suitable cropping system 27 



2. Final arrangement of the several fields, showing the cropping system 



recommended 30 



3. Cotton field badly infested with the root-rot, showing the result of 



spring subsoiling 41 



102 5 



