91 



of them was greater. Kainit in place of muriate of potash was 

 injurious to the crop. 



KOHLRABI. Mr. Buehler, near Laupheim, manured with 40,000- 

 lb. dung per acre. Result, 36,000 lb. of kohlrabi. Adding 400 lb. 

 Thomas phosphate and 200 lb. nitrate of soda, the crop yielded 

 41,600 lb. When adding to the dung, the phosphate, and nitrate on 

 another plot 400 lb. kainit, he obtained 50,600 lb. per acre, and a net 

 profit of 1/19/. 



LETTUCES. -At Hadlow the crops were enormously greater and 

 more vigorous where commercials were given in addition to light 

 dung, Four hundredweights superphosphate or 7 cwt. Thomas 

 phosphate, with 4 cwt. nitrate of soda without dung, were 3 cwt. of 

 lettuces better in two crops than 12 J tons of dung alone. 



MELONS. The whole plants of water melons took from the soil, 

 according to Mr. H. J. Patterson, of Maryland Experimental station, 

 the following plant food per acre, viz., 37.20 lb. of nitrogen, 12.82 lb. >f 

 lowing plant food per acre, viz., 37.20 lb. of nitrogen, 12.82 lb. of 

 phosphoric acid, 56.65 lb. of potash, and 10.60 lb. of lime. This 

 shows that less phosphoric acid is reauired than for Cucumbers. At 

 Georgia Experimental Station 360 lb. of superphosphate and 180 

 lb. of nitrate of soda gave 34 fruits, against an average of 5.75 fruits- 

 from three unmanured plots. 



Sweet Melons showed at Rhode Island that at the rate of 5,720' 

 lb. of burnt lime per acre was absolutely required to obtain a good 

 crop. At the rate of 700 lb. of superphosphate, 320 lb. of muriate 

 of potash, 180 Ib. of sulphate of magnesia, 320 lb. 

 of sulphate of ammonia and 5,720 lb. of burnt lime per acre gave 

 per plot 17.35 lb. of fruits, and where 480 lb. of nitrate of soda 

 was substituted for the sulphate of ammonia 23.40 lb. of fruits. 

 Where dung is also given, of course, much less nitrogen is required. 



ONIONS. M. Marshal, of Vilaine-en-Haye, France, used 1,600* 

 lb. of Thomas phosphate, 160 lb. sulphate of potash, and 160 lb. 

 nitrate of soda per acre. Result, 5,600 lb. more than from un- 

 manured. Considering that E. Von Wolff's analysis mentions that 

 a crop of 16,000 lb. of onions per acre require only 21 lb. of phos- 

 phoric acid less Thomas phosphate may be sufficient, as appears also- 

 by experiments at Hadlow. Plots with dung were very poor, 

 averaging 3 tons per acre, probably essentially due to the absence 

 of its physical influence in enabling the soil to retain moisture. 

 Twelve and a half tons dung and 4 cwt. each of superphosphate, of 

 nitrate of soda and kainit, gave the best result; in 1897 12| tons 

 per acre, partly due to the moisture-attracting power of the kainit 

 in a dry season. In the United States no less than 270 lb. of nitrate 

 of soda, 450 lb. of a phosphatic manure, and 160 lb. muriate or sul- 

 phate of potash per acre are used. 



PARSNIPS gave at Hadlow similar results as Carrots, 

 PEAS. See page 74. 



RHUBARB. The large variety, "Victoria/' gave at Hadlow a 

 large increase with 25 tons dung over 12^ tons. The approximate 

 weight per acre was 27J tons, against 20 tons, while, however, to 

 12?> tons dung, 4 cwt. superphosphate, or 7 cwt. Thomas phosphate- 



