ON GUANO, AND ITS COMPARATIVE MERITS. 197 



properties would be left to tlie succeeding- crops. If tlie 

 nature of the season were taken into account, in conjunc- 

 tion with the quantity of g'uano to be applied, it was very 

 probable that many of the apparent diti'erences of opinion as 

 to the quantity of guano to be applied, and the diii'erent 

 effects produced, might be reconciled. 



Farmer^s Magazine, September 1846. 



Art. XLIV.— effects OF GUANO IN GROWING CABBAGES. 



By Mr. A. F. Gardner. 



The soil upon which they were gTown is about 2 acres of 

 improved moss land, trenched with the spade in 1842, and 

 the subsoil broug-ht to the surface. It was cropped with 

 potatoes in 1843, maniu'ed with 12 tons farm-yard manure, 

 and 3 cwt. g-uano ])qv acre, and produced a crop of upwards 

 of 15 tons per acre. It was again dug- this spring with the 

 trenching-grape, Avhen 2 cwt. of guano per acre was sown 

 by the hand, broadcast, and harrowed in. After which, in 

 the beginning of April, the cabbages (Drumhead) were 

 dibbled in upon about an acre, and the other portion sown 

 with mangel-wurzel, the land being cleaned and worked in 

 the usual manner. These crops have grown most luxu- 

 riantly, the cabbages giving a crop of upwards of 60 tons 

 per acre, most of them averaging from 20 to 40 lb. a piece. 

 The mangel -wiirzel is now (Nov.) still growing, but has 

 been estimated by good judges to be 40 tons and upwards 

 per acre of clean roots, many of them averaging 10 to 12 lb. 

 a-piece. 



Art. XLV.— on THE USE OF CHARCOAL AS A 

 FERTILIZER. 



By Cuthbert W. Johnson, Esq., F.R.S. 



I HARDLY deem it necessary to prove to any one the value 

 of charcoal as a valuable manure ; and if it was necessary 



