Apr. i-June 24, 1918 



Illustrations xi 



Nysius ericae, the False Chinch Bug 



Page 



Plate 6o. Nysius ericae: Adult 578 



Plate 6i. Nysius ericae: Nymphal instars. A. — First-instar nymph. B. — 



Second-instar nymph. C. — Third-instar nymph. D. — Fourth-instar 



nymph. E. — Fifth-instar nymph, or pupa 578 



Comparative Transpiration of Corn and the Sorghums 



Plate 62, A. — Freed's sorgo, Freed's White Dent com, Dwarf milo, and 

 feterita. B. — Freed's sorgo, Pride of Saline corn. Dwarf Blackhull kafir, and 

 Sherrod's White Dent com. C. — Dwarf Blackhull kafir. D. — Position of 

 the plants in the field. E. — Red Amber sorgo and Sherrod's White Dent 

 com 604 



Plate 63. A. — Blackhull kafir, 4 feet high, heading. B. — Pride of Saline com 

 at period of full leaf development. C. — Dwarf milo heading. D. — Dwarf 

 milo, Pride of Saline com, and Dwarf Blackhull kafir 604 



SUNSCALD OF BEANS 



Plate 64. A. — Six pods of the Green Bountiful variety of beans which showed 

 natural sunscald on September i. B. — Reverse side of the six pods shown 

 in A 650 



Plate 65. A. — Two pods of beans, the one at the left injured by sunscald, 

 the one at the right having been protected from the rays of the sun. The 

 pod at the left was exposed to the sun in the position shown. The pod at 

 the right was covered by slipping it through a slit on the back edge of the 

 muslin sack. B. — Four groups of bean pods exposed tied in muslin sacks. 

 The two at the left were slightly spotted as shown when the experiment 

 *began 650 



Plate 66. A. — Refugee wax beans. The pod at the right was exposed for one- 

 half its length. The image in the mirror shows the freedom from spotting 

 of the underside of the exposed pods. B. — Hardy wax beans, showing 

 sunscald on the stems, branches, and pods 650 



TEXT FIGURES 



Studies on Capacities op Soils for Irrigation Water and on a New 

 Method of Determining Volume Weight 



Fig. I. Diagram for determining the depth of irrigation water, in inches, nec- 

 essary to add a given percentage of moisture to i foot of soil 3 



2. Graphs of the water content before and after irrigation, moisture equiv- 



alent, and pore space of silt-loam soils having fine sandy-loam subsoils 9 



3. Graphs of the water content before and after irrigation, moisture equiva- 



lent, and pore space of silt-loam soils 11 



4. Graphs of the water content before and after irrigation, moisture equiva- 



lent, and pore space of clay-loam soils 12 



5. Graphs of the water content before and after irrigation, moisture equiva- 



lent, and pore space of clay soils 13 



6. Graphs of the water content before and after irrigation, moisture equiva- 



lent, and pore space of clay soils 16 



7. Graphs showing the comparison of water content before and after irriga- 



tion, moisture equivalent, and pore space of soils of plots B and D, 

 Davis, Cal 20 



8. Graphs showing the comparison of water content before and after irriga- 



tion, moisture equivalent, and pore space of soils of plots C and D, 

 Davis, Cal 21 



