530 



EXPERIMENT STA/TION RECORD, 



northern China, and a number of smaller collections are noted. In addition 

 to the names of the plants, brief accounts are given as to their habits of 

 growth, uses, etc. 



FIELD CROPS. 



The problem of the unequal efficiency of our cultivated plants, S. 

 Strakosch (Da.s- Problem der Unylewhen Arhcitsleistung uiiscrcr Kultur- 

 pflanzen. Berlin, 1907, pp. IX+110). — In this book the author discusses and de- 

 fines what he terms the "assimilatory effect " in plants, outlines the method of 

 its determination, and explains its application in crop rotation and crop cul- 

 ture generally. 



The " assimilatory effect " is the quotient derived from the value of the 

 ntilizable substance which a crop produces upon a given area and the value 

 of the quantity of plant-food elements t.-iken from the soil to produce this 

 substance. 



The results nf the author's calculations are summarized in the following 

 table : 



F.HtiuKiIrd rchilire rdliir of different crops «.s- haned on the iitilizrihlc substance 

 produced and the plant food consumed bt/ an average yield per hectare. 



(Iroji. 



Produc- 

 tion of 

 starch. 



Produc- 

 tion of 

 digesti- 

 ble albu- 

 minoids. 



Value 



of 



product. 



SecaU' cereale 



TrUicum vuUjarr 



Hordeum vulgarr 



Avetia Sdtiva 



Zea mays 



Oryza satini 



Andropogon i^orplium 



Polygonum fagopyrnm 



Pisrim sativum 



Vicia faba 



Hoja hiKpida 



Lu})iniis litteiis 



Solan Will tubrrnfum 



Beta vidgaris 



Tirafsica nnpus rapifait 



Daurus carota 



Helianthus tuberosiii' 



Lolixim perenni' 



Phleitm praleii^e 



Zea wa;/s (Rrcen ) 



Tri/nliiim pratense 



Medirago saliva 



Trifiilinm rrpnis 



Trifoliiun. incdrimtuiii 



Antlujllis riiliK raria 



Hedysaruiii oimhryclM 



OmWioptis satitms 



Vicia saliva 



Brassica napus nln'/cra 



Papiivrr soiiinifcrinii 



Androjjogon suvghiim sac- 

 cftarum 



Kg. 

 2, 093. 

 2, 084. 

 2, 492. h 

 2, 144. 9 

 h, 303. 5 

 2,990.0 

 4,611.5 

 1,4.56.6 

 2, '2m. s 

 3.075.0 

 3, 483. 2 

 1,683.2 

 5, .509. 

 7,784.0 ■ 

 3,799.0 I 

 4,93,5.0 ! 

 S, 6.50.0 j 

 1,908.0 I 

 3, 640. 

 4. .5.50. 

 2, 716. 

 2, 912. 

 1,232.0 

 1,800.0 

 1,738.0 

 2, 470. 

 1,452.0 

 1,679.0 

 4,103.1 

 2,133.2 



Kg. 

 186.8 

 274. 1 

 1.56.8 

 181.3 

 399.5 

 201. 5 

 266.0 

 191.8 

 544.8 

 762.2 

 943.6 

 540. 8 

 .52.0 

 203. 

 167.0 

 312.5 

 290.0 

 234. 

 260. 

 300.0 

 476.0 

 544.0 

 266.0 

 300.0 

 132.0 

 494.0 

 330.0 

 414.0 

 384.9 

 240.2 



3,240.0 240.0 



Mavks. 

 347 

 449 

 426 

 355 



1,240 

 490 

 7.50 

 248 

 414 

 .560 

 643 

 311 

 868 



1,241 

 612 

 805 



1,385 

 323 

 599 

 744 

 475 

 .512 

 220 

 313 

 2K6 

 438 

 262 

 305 

 682 

 3.58 



533 



Value 

 of plant 

 food 

 con- 

 sumed. 



MaiVf. 



94.00 



121.00 



92.20 



103.00 



165.00 



46. 00 



144.00 



67.00 



19.00 



39.00 



26.00 



20.00 



1.56.00 



131. (K) 



199. 00 



203. 00 



224. 00 



188.00 



243. 00 



162. 00 



31.90 



40.42 



16.36 



13. 72 



17. 51 



20.95 



42.00 



26.00 



171 . 00 



105. 00 



447.00 



Difference 

 between 

 production 

 and con- 

 sumption 



Marks. 

 2.53. 00 

 32X.00 

 334.00 

 252. 00 



1 , 075. 00 

 444. 00 

 606.00 

 181.00 

 395.00 

 .521. 00 

 617. 00 

 291.00 

 712. 00 



1,110.00 

 427. 00 

 602.00 



1,161.00 

 135. 00 

 356. 00 

 .582. 00 

 443. 10 

 503. 58 

 203. 64 

 299. 28 

 268. 49 

 417. 05 

 220. 00 

 279. 00 

 511.00 

 253. 00 



86.00 



In the above table the figures referring to Loliiim perenne. Phleuni pratense. 

 Trifolium pratense. Mcdicufjo satira, Trifolium rcpens. Trifolium incarnatum, 

 AnthyUia vulneraria, Hcdysaruni onobrychis. Ornithopus sativus, Vicia saliva, 

 and Andropogon sorghum saceharum represent the green crop. In all other 

 cases the figures given are based on the total crop of grain and straw or roots 

 and leaves. 



The foragre and fiber crops in America. T. F. Hunt {New York and Tjondon, 

 1901, pp. XXI+'flS, pi. I, figs. lo.3, dgnis. .',). — This book discusses the character- 



