1919] FIELD CROPS. 333 



conditions. Data obtained from milling and baking tests for 1915 and 1916 at 

 the Kansas Station are siunmarized. 



Wyoming' forage plants and their chemical composition, V, F. E. Hepnee 

 (Wijoming Sta. Rpt. 1918, pp. 117-128). — Supplementing work previously noted 

 (E. S. R., 25, p. 130), the author presents a tubulated statement showing the 

 nitrogen content of 63 samples of grasses, rushes, and sedges collected at different 

 altitudes ranging from about 6,900 to 10,000 ft., together with the nitrogen con- 

 tent of the soils upon which they grew. The average nitrogen content of all crop 

 samples collected below 8,000 ft. elevation was 1.268 per cent, and that for all 

 samples collected above 8,000 ft. was 1.385 per cent. Data relative to the total 

 nitrogen content of soils from different altitudes were inconclusive, while nitrate 

 determinations in several soils having approximately the same amount of total 

 nitrogen but differing greatly in the amount of nitrogen in the plants grown 

 thereon also failed to lead to any definite conclusion, the nitrate content being 

 quite small in all cases. A complete analysis of some twenty-five of the soils by 

 the strong acid digestion method failed to reveal any correlation between the 

 nitrogen content of the plants and any of the soil constituents. It is concluded, 

 therefore, that " the abundance of nitrogen found in high altitude grasses is not 

 due entirely, if at all, to the greater amount of nitrogen, either total or nitrate, 

 in the soils, nor is it due to excessive quantities of any other soil constituent." 

 Other factors are believed to play a much more important role than does the soil 

 in causing an increased storage of nitrogen by high altitude plants, although 

 the author does not advance any theories as to what these factors may be. 



Tabulated data are also presented showing the complete proximate analysis 

 of the following plants: Western wheat grass (Agropyron Occident ale) , western 

 couch grass (A. pseudorcpeiis), slender wheat grass (A. tenerum), red top (Agros- 

 tis alia), slough grass {Beckmannia cruccEformis), grama grass {Bouteloua 

 oligostacluja) , smooth brome grass {Bromus incrmis), Porter brome grass (B. 

 porteri), giant sedge {Carex aristata), mountain sedge {C. f estiva ebenea), Ne- 

 braska sedge (C. nebraskensis) , Alpine or cliff sedge (C. scopulorum), hillside 

 sedge (C. siccata), bottle sedge (C. utriculata), variable sedge (C variabilis), 

 tufted hair gi'ass {Deschampsia ccespitosa), spike rush (Eleocharis palustrisy, 

 Macoun rye grass {Elymus niacowiii), reed meadow grass or manna {GUjceria 

 grandis), squirrel-tail grass (Hordeum jtcbatum), wire grass or Baltic rush 

 {Juncus halticus), long-styled rush (J. longistylis) , knotted rush (,/. nodosus), 

 Merten rush (./. mertensianus), Richardson rush (-/. richardsoniamis) , mountain 

 timothy (Phleton alpinum), timothy (P. pratense), nodding blue grass (Poa re- 

 flexa), alkali meadow grass (Puccinellia airoides), American rush (Scirpus 

 americanus) , fine top salt grass [Sporobolus airoides), drop seed (S. brevifolius), 

 downy oat grass {Trisetum subspicatuni), Nevada blue grass (Poa nevadensis), 

 and spike rush {Eleocharis palitstris). 



Brief descriptions of Macoun rye grass, Richardson rush, and American rush 

 are included. 



Farm crops, C. A, Zavitz (Ontario Dept. Agr. Bui. 268 (1919), pp. 80, figs. 

 ^S).— Variety, cultural, rotation, fertilizer, seed selection, and date of seeding 

 tests with numerous field crops, including cereals, potatoes, root crops, field 

 peas and beans, vetches, soy beans, cowpeas, corn, sorghum, millet, and sun- 

 flowers for seed and forage, and flax for seed and fiber, together with mis- 

 cellaneous tests of mixtures of grains, grasses, and legumes for pasture, etc., 

 are reviewed in connection with work in progress at the Ontario Agricultural 

 College for several years. Much of this has been referred to from time to 

 time in previous reports and bulletins. 



