SHAPE AND SIZE OE PEOTS IN TESTS OE VARIETIES OE GRAIN. 



77 



Further evidience of the increased yield attending the growth 

 of plants in an allotment of considerable space is presented in 

 the work of Waoker.* From data given by this author Table i 

 has been formed. In this is shown the yield of grain produced 

 by plants developing under conditions of heavy seeding and light 

 seeding. 



TabeE I. 

 Yield of Grain Planis in Conditions of Heavy and Light 



Seeding. 



Average number 



of plants har- 

 vested per square 

 meter. 



Yield of Grain. 



Per plant 

 — gms. 



Per culm. 

 — gms. 



Winter Barley: 



Heavy Seeding 



Light Seeding 



Winter Rye: 



Heavy Seeding 



Light Seeding 



Square Head Winter Wheat 



Heavy Seeding 



Light Seeding 



Spring Barley: 



Heavy Seeding 



Light Seeding 



240.9 

 21.8 



156.6 

 16.7 



221.1 

 20.7 



141.7 

 27.4 



2.34 

 29.88 



4.20 

 24.26 



2.43 

 21.90 



1.56 



9.58 



0.65 

 1.64 



.35 

 .07 



0.86 

 1.58 



0.65 

 1.20 



Unfortunately the plots of oats in these tests, so it is stated, 

 were damaged to such an extent as to be of no value. From 

 the figures quoted here one is convinced oif the great increase in 

 the yield when grain plants develop in considerable space as 

 compared with plants growing under field conditions. It should 

 be noted that plants grown in the larger space as compared with 

 those grown in the smaller space yield six to thirteen times as 

 much grain per plant or one and a half to two and a half times 

 as much per culm. 



In making calculations of the relation between the marginal 

 area and the total area of a plot it was considered a conserva- 

 tive estimate that all plants growing in an area six inches wide 

 within the bord'er of the plot receive benefit from the clean 

 cultivation of the pathways. The basis of this assumption lies 



* Wacker : Versuche mit den neuen Getreidekultuirverfahren nach 

 Demtsohinsky und Zehetmayer. Landw. Jahr. Bd. XLI, IQII. 



