328 Reiport of the Horticultural Dkpartment of thr 



In Jordan's^^ experiments in New Jersey, extend in j? from 1800 

 to 1899, seven crops were grown on a prepared soil (3 parts turfy 

 loam, 2 parts manure and 1 part sand), on clay soil and on sandy 

 loam. The fertilizer plats all received muriate of potash, 200 

 lbs. per acre, and acid phosphate, 350 lbs., with 320 lbs. nitrate 

 of soda or equivalent nitrogen in sulphate of ammonia or dried 

 blood. The prepared soil alone gave one-fifth better results than 

 the same soil with fertilizers, and was not equalled by the other 

 soils, fertilized or unfertilized. The use of lime on the prepared 

 soil decreased the yield 12 per ct., but increased the yield where 

 chemicals were used. 



Card^^, in 1899, grew lettuce in pots, with results indicating 

 that chemicals would give as good lettuce as stable manure. In 

 1900 he grew three crops on the greenhouse bench and, in coop- 

 erative work, two crops on a solid bed in a commercial forcing 

 house. Chemxical ferilizers were far behind stable manure in 

 yields produced, even on soil lightened by adding moss and sand. 

 In the commercial house, presumably on a rich loam soil, with a 

 layer of manure under the soil a top dressing of bone black, 

 nitrate of soda, muriate and sulphate of potash gave better 

 lettuce than a top dressing of manure. In a second test this 

 combination with ground bone in place of bone black gave better 

 results than acid phosphate, nitrate of soda and sulphate of 

 potash combined or any two of them together. 



In continuing his experiments, Stuart^'^ used much smaller 

 proportions of. muriate of potash than in former tests. Little 

 difference was observed between the muriate and sulphate when 

 they were used with raw bone meal alone or with the bone meal 

 and nitrate of soda; and the difference favored the muriate. 



The stable manure tests are especially interesting in connec- 

 tion with the experiments to which this bulletin is devoted. 

 Black loam soil deficient in plant-food, fertilized with acid phos- 



" Jordan, A. T. N. J. Agrl. Exp. Sta. Kept. 1800:149-159. 

 "Card, F. W. R. I. Sta. Repts., 1890:1.35. and 19()0:2.")2. 

 '^Stuart, Wm. lud. Sta, Bui. 84 : 113-142 (1000). See also Anier. Card. 

 21:94. 



