181 



some soils, and in certain localities such may be the case. Largo quan- 

 tities of guano have been o tained from islands on the coast of Peru, 

 and also from Africa. Peruvian guano is generally superior to African. 

 Guano should l>e well pulverized before it is applied, and also mixed 

 with twice or (hrice its hulk of cold ashes or fine rich clay; by this 

 means it can be spread evenly on the field, and its value will be in- 

 creased. Guano should be s[>read broadcast over the field, just before 

 the drills are formed — it will thus become mixed with the soil without 

 being buried too deep, and too far away from the roots of plants. I 

 have sometimes seen it spread along the drills before the turnip ma- 

 chine, the coulters or shares of which cover it sufficiently deep; but it 

 is well to bear in mind, that if placed too close to seeds of any kind, it 

 will dastroy them. 



From a valuable table of the analysis of several kinds of manure, 

 com[>iled by Mr. James Haywood, it appears that one ton of guano 

 contains, of the following substances: 



Chlorine. SuJph. Acid. Phos. Acid. Soda. Potash. Nitrogen. 

 .«2 93.8 283.9 36.15 66.88 182.8 



Whilst one ton of mixed barn yard dung contains of the same sub- 

 stances, only the following quantities: 



Chlorine. Sulph. Acid. Phos. Acid. Soda. Potash. Nitrogen. 

 1.9 1.4 5.1 1.10 2.4 ll.O 



According to this table, it will take 240 tons of barnyard dune to 

 supply the same amount of ingredients, as one ton of guano; one fourth 

 of the weight of barnyard manure consists of water, which of course 

 is not of much value to the crop. It contains other ingredients besides 

 those enumerated in the foregoing table, namely, organic matter and 

 lime, hut its most important contents and those in which its true value 

 consists are (he suhstances specified in the table. 



Guano has a very good effect when mixed with barn-yard-Jung and 

 also with salt or gypsum. 1 ime destroys its good qualities by dispel- 

 ing the ammonia which is one of its most important ingredients: 



Analysis of Peruvian Guano. (Dr. Antistll) 



Azotized animal matter containing urate of Ammonia, 60.0 



Water, Hq 



