SEEDS WEEDS. 



555 



State seed-control stations, of which 3,588 analyses were made for farm- 

 ers, 5,548 for seedsmen, and 777 in investigational work conducted by 

 the stations. Of the analyses made, 25.1 per cent were made at the 

 Lund Station, 12.9 per cent at Stockholm Station, 11.7 per cent at 

 Oerebro Station, and the rest divided among - the remaining 15 seed- 

 control stations. 



While the quality of most kinds of seed examined was very good, 

 considerable variations were found, as shown below : 



Variations in percentage of pure viable, seed. 



Kind of seed. 



Winter rye 



Two rowed barley 



Six-rowed barley 



White oats 



Red clover 



Kidney vetch 



Timothy 



Swedish turnip 



Carrot 



Parsnip 



Fir (A biex exceha) 



Norway pine (Pinus sylvestris) 



Number 



of 

 samples. 



308 

 296 



200 



414 



,296 



29 



615 



100 



59 



10 



76 



Pare viable seed. 



Average. Maximum. Minimum 



Per cent. 

 90.1 

 95.8 

 96.1 

 91.7 

 88.1 

 87.5 

 86.1 

 95.5 

 60.9 

 53 



80.1 

 83.8 



Per cent. 

 99.7 

 99.9 

 100 

 300 

 98.7 

 98.8 

 99.2 

 99.9 

 92.5 

 87.1 

 98.9 

 97.9 



Pi r cent. 



18.8 

 14.7 

 13 

 8 



1.4 

 5.8 

 36.2 

 27.5 

 18.8 

 *1 



10.7 

 9.7 



Determinations of the viability of weed seeds made at the Jonkoping 

 Station showed the following results: Gentaurea cyanus 88.3 percent, 

 Antliemis tinctoria 57.5 per cent, Cerastium vulgatum 89 per cent, 

 Cuscuta trifolii 19.5 per cent, Bromus secalinus 94.3 per cent, Prunella 

 vulgaris 67.8 per cent, Stellaria media 72 per cent, and Cirsium arvense 

 1.5' per cent. — f. w. woll. 



Additional notes on seed testing, G. H. Hicks and S. Key ( U. 8. 

 Ik'pt. Agr. Yearbook 1897, pp. 411-452, figs. 3). — In continuation of 

 previous papers published in the Yearbooks of this Department on 

 pure-seed investigation, the authors in the present paper treat mainly 

 of the special apparatus, methods, and expedients which have been 

 adopted in the regular work of the Seed Laboratory of this Depart- 

 ment. Attention is also called to the importance of field tests, which 

 are too frequently neglected in ordinary seed-testing work. 



Some methods in the study of mature seed, L. H. Pammel {Jour. AppJ. Micros., 

 1 {1898), No. 3, pp. 37-39, figs. 6). 



The choice of seed, G. Battaxchox {Prog. Agr. et Fit., 30 {1898), No. 44, pp. 527- 

 531). — The author in a semipopular article, points out the value of good seed and the 

 necessity for their selection. 



On the selection of seed by their specific weight, L. Degrully {Trog. Agr. 

 et Yit., 30 {1858), No. 42, pp. 453-455) .—The author states the general advantage accru- 

 ing from the use of heavy seed and cites examples in which there was an increased 

 yield of oats of 260 kg. grain and 360 kg. straw per hectare from the heavier seed. In 

 the case of maize a gain of 33£per cent was due to the use of heavy seed. Report 

 of the seed-control station at Lund (Sweden) for 1897, B. Jonsson (Malmo, 1898, 

 pp. 29). 



