1898.] PUBLIC DOCUMENT — No. 33. 17 



Plot 1, 2,640 pounds; Plot 2, 2,990 pounds; Plot 3, 2,915 

 pounds; Plot 4, 3,555 pounds; Plot 5, 2,885 pounds; Plot 6, 

 2,905 pounds; Plot 7, 2,850 pounds; Plot 8, 3,020 pounds; 

 Plot 9, 3,160 pounds; Plot 10, 3,095 pounds; Plot 11, 3,000 

 pounds; Plot 12, 3,090 pounds; Plot 13, 3,440 pounds. 



These weights were taken with a view to determining 

 whether these plots were fairly even in fertility. It will 

 be noticed that with three exceptions, plots 1, 4 and 13, 

 this appears to be the case. Plot 1 is apparently poorer 

 than the average, Avhile plots 4 and 13 are better. 



In 1897 the soil was thoroughly prepared by the use of 

 the wheel harrow. Fertilizers were applied May 11. Each 

 plot in the field received the following materials : potash- 

 magnesia sulphate, 50 pounds ; nitrate of soda, 30^ pounds ; 

 sulphate of potash, high grade, 12^ pounds. These ma- 

 terials supplied the potash and nearly all the nitrogen 

 estimated to be required. Some of the phosphates to be 

 employed (the bone meals), however, contained nitrogen as 

 well as phosphoric acid, and, to equalize conditions on all 

 the plots, sufficient hoof meal was applied to those not 

 receiving bone to make the quantity of nitrogen applied to 

 each plot throughout the field the same. 



The plots contained, as stated, one-eighth of an acre each, 

 and the materials used furnished to each plot phosphoric 

 acid, 12 pounds; nitrogen, 6^ pounds; potash, 19 pounds. 



The fertilizers used per plot (in addition to nitrate of 

 soda and sulphate of potash which were used alike on each 

 as stated above) are shown below : — 



Plot 1: hoof meal, llf pounds. Plot 2: hoof meal, llf 

 pounds; apatite, 32 pounds. Plot 3: hoof meal, 11^ pounds; 

 South Carohna rock phosphate, 47 pounds. Plot 4 : hoof meal, 

 llf pounds; Florida soft phosphate, 45^ pounds. Plot 5 : hoof 

 meal, llf pounds; slag, 67i pounds. Plot 6: hoof meal, llf 

 pounds ; Navassa phosphate, 49 pounds. Plot 7 : hoof meal, 

 llf pounds. Plot 8: hoof meal, llf pounds; dissolved bone- 

 black, 70 pounds. Plot 9 : hoof meal, -^^ pound ; raw bone 

 meal, 45 pounds. Plot 10: hoof meal, 1^^ pounds; dissolved 

 bone meal, 73^ pounds. Plot 11: steamed bone meal, 48^ 

 pounds. Plot 12: hoof meal, llf pounds; acid phosphate, 90^ 

 pounds. Plot 13 : hoof meal, 11| i)ounds. 



