118 ON NEWLY CLEARED ACID LANDS. 



the remainder was seldom visible from a short distance, and in the 

 spring stood much thinner, from the greater number of plants 

 killed during the winter. The line of separation very perceptible 

 throughout both crops. 



1820. At rest. During the summer marled B C g h, at the rate 

 of five hundred bushels, without excepting the space before covered, 

 and a small part of that made as heavy as one thousand bushels, 

 counting both dressings. The shells now generally coarse average 

 strength of the marl, 37 per cent, of calcareous earth. In the 

 winter after, ploughed three inches deep only, as nearly as could 

 be ; which however, shallow as it was, made the whole new surface 

 yellow, by bringing the barren sub-soil of yellow sand to the top. 

 One of my neighbours, an intelligent and experienced farmer, who 

 saw the land when in this state, pronounced that I " had ruined 

 the land for ever, by ploughing and turning the soil too deep.'' 



Results continued, 1821. In corn. The whole a remarkable 

 growth for such a soil. The oldest (and heaviest) marled piece 

 better than the other, but not enough so to show the dividing line. 

 The average product of the whole supposed to have been fully 

 twenty-five bushels of ripe and good corn to the acre. 



1822. In wheat and red clover sowed on all the old marling, 

 and one or two acres adjoining. A severe drought in June killed 

 the greater part of the clover, but left it much the thickest on the 

 oldest marled piece, so as again to show the dividing line, and to 

 yield, in 1823, two middling crops to the scythe the first that I 

 had known obtained from any acid soil, without high improvement 

 from putrescent manures. 



1823. At rest nothing taken off, except the clover on B C m I. 



1824. In corn product seemed as before, and its rate may be 

 inferred from the actual measurements on other parts, which will 

 be stated in the next experiment, the whole twenty-six acres being 

 now cleared, and brought under like cultivation. 



Experiment 2. 



The part efno, cleared and cultivated in corn at the same 

 times as the preceding but treated differently in some other 

 respects. This had been deprived of nearly all its wood, and the 

 brush burnt, at the time of cutting down and its first crop of 

 corn (1818) being very inferior, was not followed by wheat in 

 1819, because promising too little product to pay for the cost of 

 the crop. This gave two years of rest before the crop of 1821 

 and five years rest out of six, since the piece had been cut down. 

 As before stated, the soil rather lighter on the side next to o e t 

 than nf. 



March, 1821. A measured acre near the middle, covered with 

 six hundred bushels of calcareous sand, containing 20 per cent. 



