190 EXPERIMENTS ON THE CONTINUED 



greatly improved upon, and therefore should not be taken as 

 a just criterion, eitlier for the purpose of estimating' the 

 value of the nig-ht-soil, or deterinining- the best mode of 

 applying- it. 



Trans, of the High, and Agric. Soc. of Scotland, Oct. 1846. 



Art. XLL— experiments ON THE CONTINUED EFFECTS 

 OF SPECIFIC MANURES. 



By Mr. A. F. Gardner, Barrochan, Renfrewshire. 



The cojichislons to be drawn from these crops for three 

 years are, — 1st, That moss and guano are able to supply the 

 place of farm-yard manure in a greater degree than any 

 other substance that has yet been tried hei-e ; and from the 

 experience of the last four years it has been found that a 

 mixture of dung and guano, in the proportion of from 10 

 to 14 tons of the former to 3 to 5 cvvt. of the latter, will 

 raise a larger crop, in the first instance, than from 30 to 

 40 tons of dung alone, and leave the land in as good, if not 

 better, condition for the after crops, at about one-half the 

 expense of the dung. 2d, That burnt bones are equal, if 

 not superior, to fresh bones, for raising crops to which bones 

 are applicable as a manure ; and that bones will (if applied 

 to green crops on land in which their constituents are defi- 

 cient,) keep up the fertility of such land in a high degree 

 for the after crops. Bone-dust was applied nine years ag'o 

 as manure for a turnip crop, in a field of medium soil, and 

 this field was trenched this season and sown with oats. 

 The land where the bones had been put gave 7 bushels 

 oats, and 50 stones more straw, than that land to which 

 farm-yard manure had been applied at the same time to the 

 turnip crop, besides the grain having been 2 lb. per bushel 

 heavier; and, during the time this field lay in grass, the 

 portion manured with the bones could be pointed out from 

 the rest by a darker colour and greater luxuriance of pas- 

 ture. 3d, That sulphate of soda, applied to green crops, 

 does not seem to have any influence iij)on crops after the 

 second year of its application. 



Trans, of the High, and Agric. Soc. of Scotland, Jul 184&. 



