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3ULLETIX 1126, U. S. DEPARTMENT OF AGRICULTURE. 



In section 1 of Table 9 it is shown that the yields of potatoes were 

 not greatly influenced by the borax until largo quantities were applied. 

 In this section the fertilizer-borax mixtures were applied some time 

 before planting, and during this period the rainfall was at times quite 

 heavy. In section 1 an application of 100 pounds was required 

 before any marked depression in the yield took place. 



In section 2, where the fertilizer-borax mixtures were applied and 

 planting done immediately, the first obvious depression in yield took 

 place with the 30-pound application of borax. 



In section 3, where the fertilizer-borax mixtures were sown broad- 

 cast as much as practicable, no distinct depression in yield can be 

 attributed to concentrations of borax under 50 pounds. 



Table 10. — Effect of various quantities of borax on corn in plats on Sassafras loma at 



New Brunswick, N. J., in 1920. 



[Yields stated in pounds, air-dry basis; fertilizer application, 400 pounds per acre.) 



Borax: per acre. 



Grain. 



Sec. 1. a I Sec. 2.6 Sec. 3.c 



Cobs. 



Sec. l.o Sec. 2.6 Sec. 3.c 



Stalks. 



Sec. l.o Sec. 2.6 ! Sec. 3.c 



None (check 1) 



1 pound 



2 pounds 



3 pounds 



None (check 2) 



4 pounds 



5 pounds 



10 pounds 



None (check 3) 



20 pounds 



30 pounds 



50 pounds 



None (check 4) . 



100 pounds 



200 pounds 



400 pounds 



19.88 

 16.79 

 14.93 

 13. 36 

 13.00 

 12.00 

 8.60 

 9.47 

 11.68 

 9.24 

 7.57 

 3.41 

 19.12 

 .62 

 

 



19. 59 

 17.39 

 20.53 

 16.79 

 13. 91 

 11.97 



9.97 

 11.73 

 15.90 

 13. 90 

 12. 63 



6.79 

 20.90 



2.82 











2.43 

 1.63 

 1.81 

 3.05 

 2.81 

 2.07 

 2.00 

 2.30 

 1.83 

 1.93 

 2.67 

 2.62 

 2.23 

 1.76 

 .32 

 .15 



4.32 

 3.73 

 3.18 

 2.69 

 2. 35 

 2.50 

 1.65 

 1.97 

 2.44 

 1.78 

 1.99 



.92 

 4.27 



.19 

 

 



4.33 

 3.44 

 4.33 

 3.44 

 2.82 

 2.36 

 2.04 

 2.61 

 3.16 

 2.84 

 2. S3 

 1.66 

 4.90 

 .86 

 

 



24.25 

 2.3.00 

 23.00 

 21.15 

 19. 30 

 14. 60 

 14.20 

 14.85 

 18.70 

 18.10 

 22.95 

 18.75 

 22.50 

 20.90 

 2.60 

 2.70 



22.00 

 26.95 

 25.75 

 18.20 

 1 s. 56 

 17.50 

 12.55 

 15. 90 

 16.52 

 15.13 

 16.70 



7.30 

 24.35 



1.70 











21.40 

 18.90 

 23.60 

 20.80 

 20.20 

 17.05 

 13.80 

 10. 70 

 19. 85 

 21.05 

 21.70 

 15. 65 

 31.50 



9.40 











o Fertilizer applied in drill some time previous to planting. 

 6 Fertilizer applied in drill at time of planting. 

 c Fertilizer applied broadcast at time of planting. 



In the corn experiment (Table 10) the normal fertilizer and fertilizer- 

 borax mixtures were applied at the rate of 400 pounds per acre; the 

 quantity of borax, however, was the same as that applied to the 

 potatoes. 



In section 1 very little depression in yield, if any, occurred below 

 the 50-pound application, but with quantities in excess of 50 pounds 

 the injury was quite severe. 



In section 2 the yields are somewhat confusing, but there was some 

 indication that, beginning with the 5-pound application, some injury 

 ensued, although it will be noted that with applications of 10 and 20 

 pounds per acre the yields were approximately the same as with 

 the 5-pound application. 



In section 3 some evidence is shown that, under the seasonal con- 

 ditions prevailing, fairly high concentrations of borax were required 

 to produce serious injury. 



It will be noted (Table 11), as previously brought out, that the 

 rainfall at New Brunswick during the growing season of 1920 was 

 unusually heavy, which probably reduced the concentration of borax 

 through solution and diffusion into the soil mass. At other stations 



