ro 



GARDENING FOR THE SOUTH. 



are likely to ferment with consequent loss of a consider- 

 able proportion of nitrogen.''* 



Cotton-seed-hull ashes contain besides potash seven to 

 eight per cent, of available phosphoric acid, thus making 

 this fertilizer one of the most valuable in the reach of the 

 southern planter. 



Table Giving Approximate Amount of Potash in Fertilizing Materials.^ 



Mali rials Containing Potash. 



Carnallite 



Cotton-seed-hull ashes 



Kainit 



Krugite 



Muriate of potash 



Nitrate of potash 



Sulphate of potash (low grade). 

 Sulphate of potash (high grade) 



Wood ashes (unleached) 



Wood ashes (leached) 



I\ r I't ill. ,,f 

 Actual Potash. 



13 tn 11 



15 to 25 



12 to 14 



8 to 9 



50 to 53 



•13 to 44 



28 to 30 



18 to 53 



1 to 8 



1 to 3 



I'minils of Actual 



Potash in : a n n 

 lbs of Mali rial. 



260 to 280 



300 to 500 



240 to 280 



160 to ISO 



L000 to 1060 



sen to 880 



560 to 600 



960 to 1020 



80 to 160 



20 to 60 



2.— NITROGEN. 



Nitrogen is derived from several sources — viz.: 



1. — Mineral nitrogen compounds. 



2. — Vegetable nitrogen compounds. 



3. — Animal nitrogen compounds. 



4. — From the air by certain growing plants. 



The compounds of the first group generally used in the 

 manufacture of commercial fertilizers are known as 

 sulphate of ammonia and nitrate of soda. The first results 

 from the manufacture of illuminating gas, and yields a 

 high percentage of nitrogen. Nitrate of soda is obtained 

 from the mines in Chili and Peru, and is known in the 

 markets as "Chili salpetre." Its condition when mined is 

 impure, containing a large percentage of common salt, 

 bat before shipment the crude product is purified and 



* " Fertilizers — Commercial and Domestic," B. B. Ross, Alabama 

 Experiment Station Bulletin No. 63, page 86. 

 fGeneva (N. Y.) Experiment Station Bulletin No. 94, page 324. 



