140 



EXPERIMENT STATION RECORD. 



I 



was sown as compared with the application after the crop had become well 

 advanced. Little difference in this regard was observed with Chinese peanut 

 cake. Stable manure showed an increase of 121 per cent of paddy for an applica- 

 tion of 2i tons, while an application of ."> tons per acre yielded 250 per cent 

 increase over the check i)lat and over 100 per cent more than where only half 

 as much manure was used. Stable manure also greatly increased the yield of 

 straw in proportion to the amount of grain. Fish guano, which stood next,- 

 gave an increasetl yield of 118 per cent over the check plat, followed by the 

 commercial fertilizer with an average gain of 100 per cent when applied at the 

 rate of 100 lbs. per acre. The same treatment upon the Gold Seed variety 

 produced about the same results. 



The object of the fifth experiment was to compare the relative value in 

 economy of several complete fertilizers under different modes of application. 

 The fertilizers were applied April 30, 1907, when the crop was about half 

 grown. The application in one instance was made up of fish guano, acid 

 phosphate, and sulphate of potash and magnesia, and in another of nitrate 

 of soda, sulphate of ammonia, acid i)hosphate, and muriate of potash. These 

 compounds were used alone, and the one first mentioned was also given in 

 combination with sulphate of ammonia. Where the compound containing 

 the guano was worked into the ground to a depth of several inches a gain 

 of 58.5 per cent, equivalent to a net profit of $29.60 per acre, was obtained, 

 and where the fertilizer was not worked into the ground an increase of 42.5 

 per cent, representing a net profit of .$20.75. was secured. 



In the sixth and seventh experiments, conducted in conjunction with the 

 experiment just described, two special nitrogen fertilizing tests were under- 

 taken on a field scale. Sulphate of ammonia at $72 per ton was applied at the 

 rate of 75 and 100 lbs. per acre, and nitrate of soda at $55 per ton at the rate 

 of 100 and 150 lbs. per acre. The applications were made at the same time 

 when the plants were a little more than half grown. The sulphate of ammonia 

 from the 75 and 100 lbs. applications showed increases of 80 and 85 per cent, 

 or net profits of $35.15 and $36.50 per acre, respectively. The larger application 

 barely paid for the extra cost, as compared with the use of 75 lbs. per acre. 

 The 100 lbs. application of niti'ate of soda produced a gain of 21 per cent, or 

 a net profit of $12 per acre. These results between the two forms of nitrogen 

 are in practical agreement with those secured in the pot experiments. 



The results of culture experiments with reference to age of seedlings at time 

 of transplanting and to broadcasting, drilling, and transplanting are presented 

 in the following tables: 



The yield of Japan seed rice (No. 153), as influenced by age of seedlings at 



time of transplanting. 



"At $2.50 per 100 pounds. 



