172 AMERICAN HUSBANDRY. 



harrowed at the time the land A ought to have been 

 hoed, gave a dark, flourishing colour to these three 

 rows ; and the turnips in the row d, which stood 

 farthest off from the new-ploughed land K, received 

 so much benefit from it as to grow twice as big as 

 any of the more distant rows. The row c, being a 

 foot nearer to the new-ploughed land, became twice 

 as large as those in d; but the row b, which was 

 next to the land E, grew much larger yet. F is a 

 piece of hard, whole ground, of about two perches 

 in length, and about two or three feet broad, lying 

 between those two lands which had not been plough- 

 ed that year. It was remarkable, that, during the 

 length of this interjacent hard ground, the rows d, c, b 

 were as small and yellow as any in the land. The 

 turnips in the row rf, about three feet from the land 

 E, receiving a double increase, proves that they had 

 as much nourishment from the land E as from the 

 land A, wherein they stood, which nourishment was 

 brought by less than half the number of roots of 

 these turnips. In their own land they must have 

 extended a yard all roun3, else they could not have 

 reached the land E, wherein it is probable that these 

 few roots went more than another yard, to give each 

 turnip as much increase as all the roots had done iu 

 their own land. Except that it will hereafter ap- 

 pear that the new nourishment taken at the extrem 

 ities of the roots in the land E might enable the 

 plants to send out more roots in their own land, and 

 receive something more from thence. The row c 

 being twice as big as the row rf, must be supposed 

 to extract twice as far; and the row b four times as 

 far, in proportion as it was of a bulk quadruple to 

 the row J." 



" When roots are in a tilled state," says Tull, " a 

 great pressure is made against them by the earth, 

 which constantly subsides, and presses their food 

 closer and closer, even into their mouths, until itself 

 becomes so hard and close that the weak sorts of 



