FOOD FOR PLANTS 



39 



quantity of the above mentioned acid phosphate con- 

 taining potash, and, in addition, Nitrate of Soda was 

 applied to plots 2, 3 and 4 in the proportions of 42, 

 84 and 126 pounds per acre, respectively, v^^hile no 

 Nitrate or other form of Nitrogen was applied to 

 plot No. 1. 



Data on Yields of Cotton Experiments m Lee 



County, Alabama, on Norfolk Sandy 



Loam, 1905-1906. 



Four plots were employed on one-sixth of an acre 

 each and the yields per acre are reported in terms of 

 seed cotton. In tabular form the results are pre- 

 sented as follows: 



Plot 1 — The general fertilizer on all 

 four plots was a mixture carrying 

 14% phosphoric acid and A7o 

 potash. It was used at the rate of 

 300 lbs. per acre, without Nitrate . . 



Plot 2 — Above mixture of phosphoric 

 acid and potash and an application 

 at the rate of 42 lbs. of Nitrate 

 Soda per acre 



Plot 3 — Above mixture of phos 

 phoric acid and potash and an ap 

 plication at the rate of 84 lbs. o: 

 Nitrate of Soda per acre 



Plot 4 — Above mixture of phosphoric 

 acid and potash and an application 

 at the rate of 126 lbs. of Nitrate of 

 Soda per acre 



No Nitrate 750 lbs. 930 lbs. 



42 lbs. 1116 



84 



126 



1272 



1440 



900 



1284 



1776 



In 1905, the fertilizers were applied at the time of 

 planting, the date being April 27th. In 1906, the 

 date of application of fertilizers was April 21st. 



