Jan. 6 -Mar. 31, 1923 
Index 
1017 
Page 
Mosaic— 
grass, spread by insects. 279-284 
sugar-cane- 
inoculation with by insect carriers_279-284 
spread by insects. 279-284 
Moss, E. O., Gamer, W. W., McMurtrey, 
J. E; and Bacon, C. W.: Sand Drown. 
A Chlorosis of Tobacco Due to Magnesium 
Deficiency, and the Relation of Sulphates 
and Chlorids of Potassium to the Disease 27-40 
Motion-picture film, Phytophthora zoospores 
development, details. 12-13 
Mulberry disease, caused by Sclerotinia carun- 
culoides .833 836 
Mulches— 
activity upon different soil classes. 728, 733 
depth, effect on soil moisture. 728, 733 
effectiveness in preserving soil moisture.. 727-742 
materials, effectiveness, comparisons 728, 730-732 
Mussehl, F. E., and Halberseben, D. L,.: 
Influence of the Specific Gravity of Hens’ 
Eggs on Fertility, Hatching Power, and 
Growth of Chicks. 717-720 
Mycelium, lettuce drop, control by formalde¬ 
hyde.647-648,649-652 
Mycobacterium spp., description.419-420,428 
Nemas, sources and determination. 922 
Nematode disease, wheat, distinction from 
rosette disease. 778 
New and Efficient Respirometer for seeds and 
Other Small Objects; Directions for its 
Use: Beorge T. Harrington and William 
Crocker. 101-116 
New Jersey— 
geranium leafspot disease, organism, tests 
and studies.362-372 
greensand analyses. 223-225 
Night, length, relations to plants, further 
studies in photoperiodism.871-920 
Nitric acid, effect on wheat at different stages 
of growth. 57-62 
Nitrogen— 
compounds, effect on wheat composition 
and quality. 55-68 
fixation— 
effect of aeration.668-669 
effect of calcium carbonate.676-677 
rate, relation to dextrose fermentation. 670-676 
Nodular worms, control by carbon tetra- 
chlorid, notes. 175,176,181,182,184,189 
Oats— 
germination, results of forcing methods 82, 
« . 84.85.87,90,93 
seed, content of iron and manganese. 396,398,399 
Oenothera biennis, growing, experiments with 
daylight of different lengths. 899 
Onions— 
growing, experiments with daylight of dif¬ 
ferent lengths.890-891,911 
seed-germination temperatures, notes 322,326-329 
Oospora pustulans , association with potato 
skinspot..286,287,289,290,291,293 
Ophiobolus graminis, cause of take-all disease 
of wheat, note. 771 
Oranges, Satsuma, growing on dtrangequat 
stocks. 232-233 
Organic matter, relation to sand drown.29-30 
Origin of the Central and Ostiolar Cavities in 
Pycnidia of Certain Fungous Parasites of 
Fruits: B. O. Dodge. 743-760 
Oxygen- 
consumption in respiration of apple seeds 117-129 
measurement in seed respiration, methods 
and devices. 101-109 
pressure, effect on germination of grain 
seed.91-92 
supply in relation to after-ripening erf 
seeds... 156-157 
Ozonium omnivorum, cause of cotton rootrot. 525 
Palma Christi. See Castor bean. 
Parasite of rice weevil, Aplastomorpha van - 
dtnei . 549”556 
Parasites— 
cause of wheat rosette, investigations_782-788 
grasshopper, and other insects..921-926 
Parasitic Fungi Internal of Seed Corn: 
Thomas F. Manns and J. F. Adams.495-524 
Page 
Parasitism of Sderotium rolfsii on Irish Pota¬ 
toes: H. A. Edson and M. Shapovalov.41-46 
Parman, D. C.: Biological Notes on the Hen 
Flea, Echtdnophaga gallinacea . 1007-1009 
Parsley, seed germination temperatures, note 296, 
322,323,326-329 
Pastures, burning- 
effect on soil temperature.638-639 
vegetation in Kansas. 631-644 
origin and objects of practice. 631 
Peas, seed— 
content of iron and manganese.397,398 
germination temperatures, notes.322,326-329 
Pentosans— 
destruction in pure culture. 660 
distribution in corn plant at various stages 
of growth. 655-663 
Pentoses, free, in com. 661,662 
Peregrmus maidis , carrier of mosaic disease. 281-283 
Pericarp, Johnson grass seed, structure, char¬ 
acteristics, and composition. 193-222 
Permanence of Variety in the Potato, Fred 
A. Krantz.947-962 
Peronosporaceae, literature citations. 993 
Peterson, W. H., Ver Hulst, J. H., and Fred, 
E. B.: Distribution of Pentosans in the 
Com Plant at Various Stages ot Growth.. 655-663 
Philippine, downy mildew. 239-278 
Phlorogludd, yield of com plant, experi¬ 
ments. 659,660 
Phoma euPyrena, association with potato 
skinspot. 286,287,291 
Phosphates, availability in soils, impor¬ 
tance. 818-821 
Phosphoric add content of wheat, relation 
to fertilizers....65-66 
Phosphorus, necessity to plant growth, and 
relation to aluminum. 819 
Photoperiodism, further studies...871-920 
Phyllostictina carPogena, fungus causing dew¬ 
berry blackrot, studies. 745-748, 755“757 
Phytophthora Footrot of Rhubarb: George 
H. Godfrey. 1-26 
germination details.. 9-14 
Phytophthora — 
parasitica var. rhei , isolation, description, 
and inoculation experiments. 5-18,21 
spp., description and characteristics.18-21 - 
Pigeons, feeding experiments with dried 
Azotobacter cells.829-830 
Pigment, formation in plants, rdation to 
length of day.902-903 
Pima cotton, summer irrigation.927-946 
Pinworms, control by carbon tetrachlorid, 
notes....... 185-188,189 
Plant- 
dormancy, relation to length of daylight... 905- 
908,919 
food, translocation, relation to length of 
day. 901-902 
Plants— * 
activities, reproductive and vegetative, 
relation to length of day.883-884 
diseased, iron and aluminum distribution. 805-806 
environment, relation of light period to 
other factors..... . # .910-914 
flowering and fruiting, relation to length 
of day and night.873-881 
flowering and vegetative activity, bal¬ 
ance. 881-883 
increase in stature, relation to length of 
day. 886-889 
respiration, bibliography.<13-115,129^x30 
response to length of day and night, further 
studies in photoperiodism.871-920 
senescence and rejuvenescence, relation to 
length of daylight. 908-909 
Poinsettia, growing, experiments with day¬ 
light of different lengths.876-877,883,903 
Poisonous Properties of Bikukulla cucullaria 
(Dutchman's Breeches) and B. canadensis 
(Squirrel Com): O. F. Black, W. W. Eggle¬ 
ston, J. W. Kelly, and H. C. Turner.69-78 
Pope, Merritt N., and Harlan, Harry V.: 
Water Content of Barley Kernels During 
Growth and Maturation.333-36o 
Pot cultures, new method in fertilizer studies. 39 
