Cultivation of Arable Land. Tares Varieties of Winter aad Spring. 



days afterwards the winter tare came up. This afcendancy the former did not fail 

 to maintain over the latter until the middle of December ; at which time that was 

 about fix inches high, and this not above four. They were both in a vigorous and 

 thriving condition when a froft came on and continued for fome weeks. On a; 

 thaw taking place, he found the fpring tare lying on the ground, flimy, and pu- 

 trified to the very root. The winter tare had received no damage. It grew up 

 afterwards, and was ripe before the middle of Auguft. 



This difference in the effects the froft had on them, led him to view the ftatc 

 of tares in more open fituations ; where he found that in fome grounds fcarce any 

 plants had been deftroyed, in others patches of fomething in a ftate of putrefac 

 tion, refembling the dead tares in his garden, were obferved. 



And on the 6th of March 1 7 84, both forts were again fown in the manner defcrib- 

 ed above ; and in their fpringing up and growth, a progrefs fimilar to that which 

 he had remarked in autumn was obferved. Near a week later than the winter 

 tare of the autumnal fowing, the fpring tare of the vernal fowing arrived to per 

 fect maturity. But the winter tare of the vernal fowing was mildewed, not a 

 lingle pod of it ripening. 



From thefe two circumftances there appears a material difference in the con- 

 ftitution, if he may fo call it, of the two forts of tares in queftion. He adduces 

 nothing as to the trifling difference in the colour and fize of their feeds, but paflfcs 

 on to the only vifible marks of diftinction he was able to trace in watching the 

 procefs of the two experiments. And this is a difparity in the firft leaves of the 

 upper part of the ftalks of the plants when gathered about the end of November, 

 while the leaves on the branches, which afterwards iffue in the lower part, and in 

 time form the bulk of the plants, referable one another in the two vetches. This 

 is all he has been able to offer towards the decifion of this point. Thefe differ 

 ences may be feenby confulting a plate in the fecond volume of the Annals of 

 Agriculture. 



It has been obferved by the author of the Synoplis of Hufbandry, that &quot; the 

 feeds of the winter and fpring tare are not eafily difcriminated, being nearly alike 

 in fize and every other characteriftic : but on the appearance of the blade the 

 difference is at once to be perceived. The winter tare vegetates with a feed leaf 

 of a frefh green colour, whereas the fpring tare comes up with a graffy fpear of a 

 brown dufky hue.&quot; 



There is likewife a fecond variety which is denominated the white tare, but it is 

 tenderer than even the fpring tare, of courfe feldom employed in field culture. 



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