14 AGRONOMY [Bot. Absts., Vol. IV, 



113. Neidig, Ray E., axd Lulu E. Vance. Sunflower silage. Jour. Agric-Res. 18: 325- 

 327. 1919. — The composition of sunflower silage compares very closely with that of maize 

 silage. Practical feeding tests indicate that sunflower silage is equal to maize silage for 

 many purposes. Sunflower {Helianthus) may prove a good silage substitute for maize where 

 the latter can not be grown. — D. Reddick. 



114. Nilsson, George. Redogorelse for forsok med havresorter pa Domnarvet 1905-1917. 

 [Account of oat variety tests at Domnarvet (Sweden) 1905-1917.] Sver. Utsadesf. Tidskr. 29: 

 37-44. 1919. — Fourteen years tests of 11 varieties of oats with records on yield of grain and 

 straw, time of maturity, hektoliter weight, weight per thousand grams, per cent of kernel, 

 and proportion of double kernels. Comparison with data from Ultuna indicates that the 

 same varieties produce a better quality of grain in the more northern region. Recommends 

 Victory and Goldrain for medium and Bjorn and Svalof's Dalahavre for early varieties. — 

 E. G. Anderson. 



115. Oakley, R. A. Critical studies in seed production. Seed World 6 1 : 41-42. 1919. — 

 Author states that there is great need of critical investigation to stabilize commercial seed 

 production. Critical experimentation will clear up some vital seed production problems and 

 certain fallacies relative to acclimatization and deterioration of planting stocks. — M. T. 

 Munn. 



116. Peralta y Leano, Fernando de. A study of the relation of climatic conditions to 

 the vegetative growth and seed production of rice. Philippine Agric. 7: 159-179. PI. 1-4. 

 1919. — Plots of lowland rice were started every four weeks during a period of one year, and 

 observations on climatic conditions and on growth and seed production were made regularly 

 throughout the period. The author reports that the yield of grain was highest in cultures 

 that were sown in April, May, and June, respectively, and then decreased rapidly to the 

 culture sown in October, after which it increased again. The maximum vegetative growth 

 and grain yields were obtained during the period of highest evaporation rates (measured by 

 Livingston atmometers), and the minimum were obtained during the season of low evapora- 

 tion rates. A discussion is given of the relation of the development of the plants to tem- 

 perature, evaporation, insolation, and rainfall. — S. F. Trelease. 



117. Pfeiffer, Th., W. Simmermacher, and A. Rippel (in collaboration with Frl. 

 H. Friske, and Frl. Ch. Pfotenhauer). Der Gehalt der Haferpflanzen an Stickstoff. 

 Phosphorsaure und kali unter verschiedenen Bedingungen und seine Beziehungen zu der durch 

 eine Nahrstoffzufuhr bedingten Ertragserhohung. [The nitrogen, phosphoric acid and potas- 

 sium content of the oat plant under different conditions and their relations to the increased 

 yield resulting from addition of nutrients.] Jour. Landw. 67: 1-57. 6 fig., 15 tables. 1919. — 

 See Bot. Absts. 4, Entry 1425. 



118. Robbins, W. W. Research and seed testing. Seed World 5 10 : 28. 1919.— The 

 author discusses the question under two heads, namely; (1) organization of the individual 

 laboratories for research work, and (2), organization and coordination of the research activi- 

 ties of North American seed laboratories. The conclusion reached is that investigation and 

 research should constitute a definite part of the program of seed laboratories. — M. T. Munn. 



119. Roig, Juan T., and Gonzalo M. Fortun. Dos malvas textiles Cubanas. [Two 

 Cuban malvas as fiber producers.] Estac. Exp. Agron. [Cuba] Bol. 41: 1^17. 8 fig. 1919. — A 

 .study le of two very common indigenous species of the family Malvaceae of Cuba 

 as to their possible value as fiber producing plants. Urena lobata and U. sinuata are 

 described botanically, their distribution in Cuba recorded, and comparison made with other 

 related Cuban plants which yield fiber. Manner of cultivation, results of fertilizer and 

 cultural experiments, methods of harvesting and preparing the fiber, as well as obtained 

 yields are given. — John A. Stevenson. 



