12 



VITALITY OB' BURIED SEEDS. 



seeds, but that the conditions in the greenhouse were at fault, and 

 until other tests are made these results can not be discussed with any 

 decree of satisfaction. On the other hand, it is certain that some of 

 the smaller seeds failed to germinate because they were covered too 

 deeph' when sown in the flats in the greenhouse. 



Polygonum scandens possibly should be classified in Table III, inas- 

 much as some of the seeds which were buried at depths of from 18 to 

 22 inches and from 36 to 12 inches showed a few sprouts at the time 

 the seeds were taken up, but after being transferred to the greenhouse 

 no seedlings were developed. However, the failure in the germina- 

 tion of the control sample of Pohjgonxm scandens throws it into the 

 first group (A) with the other two species of the same genus, i. e., 

 Polygoniiiii pennsylvanicuDi and P. jyerslcarla. 



The result of the tests of the buried seed of Sporoholu;^ cryptandrus^ 

 as given in this group, should be compared with the germination of 

 the unhulled seed as given in Table 111, No. 61. The control sam- 

 ples of both the hulled and the unhulled seed which were sown in the 

 greenhouse failed to germinate, but all three samples of the unhulled 

 seed that had been buried gave some germination when tested in the 

 greenhouse. 



Table II. — Results of tests of seeds wJiieli had either dercujed or germiiiuted and aftericards 



derailed irliile buried. 



a 



Labora 

 torv 

 test 

 num- 

 ber. 



I 



14 , 16196 



15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 



16197 

 16217 

 16221 

 16244 

 16233 

 16232 

 16203 

 16195 

 16186 

 16175 

 16191 

 16267 

 16199 

 16270 

 16281 

 16241 

 16245 

 16200 

 16177 

 16176 

 161S1 

 16284 

 16234 



Kind of seed. 



Chamber tests. 



Greenhouse tests in sand. 



Tem- : Origi- 

 pera- j nal 

 ture. sample. 



Zeamays(BooneCount.v white ! 



corn ) 1 



Zea mays (sweet corn) i 



Agrostemnia githago 



Brassica oleracea 



Gossypium hirsutum 



Pisuin sativum 



Phaseolus vulgaris 



Fagopyrum fagopy rum 



Triticum aestivum 



Hordeum sativum 



Avena sati va 



Secale cereale 



Cucumis melo 



Allium cepa 



Lactuoa sativa 



Helianthus annuus (cult.).. 



Linum usitatissimura 



Hibiscus militaris 



Asparagus ofiicinalis 



Bromus racemosus 



Bromus sccalinus 



Eleusineindica 



Pinus virginiana 



Robinia pseudacacia 



Con- 1 Con- 

 trol. ] trol. 



° C. 



20-30 

 20-30 I 

 20-30 ' 



20 

 20-30 

 20-30 

 20-30 

 20-30 



20 



20 

 20-30 



20 

 20-30 

 20-30 

 20-30 

 20-30 

 20-30 

 20-30 

 20-30 

 20-30 

 20-30 



35 

 20-30 

 20-30 



Per ct. Per ct. \ Per ct. Per cl. 



Depth of burial. 



6-8 1 18-22 36-42 

 inches, inches, inches. 



99. 

 98. 

 99 



85. 



77. 



99 



97. 

 100 



99 

 100 



70. 

 100 



96. 



94. 

 100 



97 



93. 



98. 



80 

 100 



88. 



7.S. 



l.N 



14 



90 

 98. 

 98. 

 82 

 72 

 98 

 98. 

 98. 

 96. 

 98 

 91. 

 9S, 

 97 

 88 

 98. 

 96. 

 95 

 92 

 em 

 9S. 

 77 

 91. 

 6. 



on. 



Per ct. Prr cl. 



9.5.5 

 88 

 88 

 70.5 

 91 

 43 



83.5 

 94 

 74 



92. 5 

 95. 5 

 75 

 43.5 

 3.5 







 

 

 

 

 

 

 

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(I Many had germinated and afterwards decayed. 



i) .Appro.xinialcly 10 piT cent had germinated; the remainder hud decayed. 

 <• An Dccasioniil old sprout was loiuid. 



t' Apriroximaiely all liad germinated and afterwards decayed. 

 * Clipped, .S7 per cent; not cli)iped. 51 per cent. 



/Practicariy all had .sprouted; the sprouts from seeds buried at the 36-42-inch depth were found 

 matted in the bottom of the pot. 

 a Clipped. 



