﻿24 



BULLETIN 112(5, V. S. DEPARTMENT OF AGRICULTURE. 



Table 15. — Effect of various quantities of borax on the tfrowlh of cotton on Clarksville 

 silt loam at Muscle ShCfab, Ala., in 1920. 



Average height of 

 plants (inches). 



Experiment, date started, and borax per acre. 



Series A, June 12: 



None 



5 pounds 



10 pounds 



20 pounds .... 



Series B, June 19: 



None ". 



5 pounds 



10 pounds 



20 pounds 



Series C, June 26: 



None 



5 pounds 



10 pounds 



20 pounds 



Series D, July 3: 



None 



5 pounds 



10 pounds 



20 pounds 



Series E, July 11: 



None 



5 pounds 



10 pounds 



20 pounds 



Series F, July 20: 



None 



5 pounds 



10 pounds 



20 pounds 



July 

 28. 



12.9 

 9.6 

 7.1 

 4.9 



12.0 

 10.5 

 8.0 

 6.9 



9.4 

 6.3 

 6.9 

 5.0 



6.2 

 5.2 

 4.1 

 3.2 



Aug. 

 20. 



25.3 



21. s ; 



17.3 

 13.2 



28.6 

 25.7 

 24.1 

 15.6 



18.1 

 15.1 

 12.9 

 9.6 



16.1 I 

 15.1 

 12.0 i 

 7.2 



12.3 



11.5 

 9.9 



8.4 



10.0 

 8.9 

 8.7 

 7.6 



Oct. 

 16. 



45. 5 

 44.4 

 42.1 

 32.6 



50.0 

 43.3 

 43.0 

 39.1 



45.2 

 40.5 

 39.9 

 31.5 



42.2 

 41.6 

 32.9 

 29.3 



36.8 

 33.7 

 31.3 

 26.1 



28.2 

 29.1 

 25.7 

 22.4 



Bolls 



'>, .•i.'jf,. 



667 

 583 

 456 

 242 



716 



563 

 576 

 383 



337 



220 



224 



97 



112 

 94 

 92 

 53 



45 

 48 

 46 



14 



5 



7 

 4 

 1 



Green weight 

 of plants. 



Pounds 



93.0 

 86.0 

 85. 

 44.0 



63.0 

 62.0 

 59.0 

 39.0 



55.0 

 56.5 

 50.5 

 38.0 



46.5 

 47.0 

 41.0 

 35.0 



Increase 

 or de- 

 crease 

 (per 

 cent). 



-7.5 



-8.6 



-52.7 



104.0 



84.0 -19.2 



78. -25. 



63. -39. 4 



S6.0 

 78.0 

 75.0 

 43.0 



-9.3 

 -12.8 

 -50. 



- 1.6 



- 6.3 

 -38.1 



+ 2.7 

 -8.2 

 -30.9 



+ 1.1 



-11. S 

 -24. 8 



Dry 

 weight 



plants 

 (lbs.). 



36.0 

 33.5 

 32.0 

 15.0 



40.0 

 34.5 

 31.5 

 25.0 



34.0 



28.5 

 26.0 

 15.0 



25.5 

 24.0 

 23.0 

 13.0 



17.5 

 20.0 

 20.0 

 11.0 



15.0 

 15.0 

 11.0 

 8.0 



Table 16. — Temperature and rainfall at Florence, Ala. (near Muscle Shoah). in June and 



July, 1920. 



Week of— 



Rain- 

 fall 

 (inches). 



Temperature 

 ( F.). 



Week of— 



Rain- 

 fall 



Cinches). 



Temperature 

 (°F.). 





Max. Min. 



Max. 



Min. 



June 6 to 12 





 .52 



97 j 53 



98 63 



Aug. 1 to 7 







5.10 



4.46 

 .59 

 .42 



2.17 

 .32 

 .54 







94 

 90 



60 



13 to 19 



8 to 14 



fifi 



20 to 26 



.58 92 1 56 



15 to 21 



'■'l 64 



27 to July 3 



.08 

 .76 

 .98 

 1.50 



93 : 61 



94 : 62 

 93 1 61 

 98 fi3 



22 to 28 



91 56 



Julv 4 to 10 



29 to Sept. 4 



Sept. 5 to 11 



96 

 • 93 

 92 

 92 

 92 



61 



11 to 17 



55 



18 to 24 



12 to 18 



55 



25 to 31 



. 06 57 



19 to 25 



55 









26 to Oct. 2 



37 



The relation of rainfall to the degree of harrafulness of borax to 

 cotton is apparent from a study of Tables 15 and 16, and this has 

 been considered in detail in an earlier paper. 7 From the results of 

 the experiment as a whole it will be observed that 5 pounds of borax 

 per acre produced some injury to cotton when applied in the rows, 

 and larger quantities showed even greater toxic effects. The results 

 are in harmony with those obtained at Arlington, Va., showing that 



' Skinner, J. J., and Allison, F.E. Theinfluence of fertilizerscontainingborax on the growth and fruiting 

 of cotton. Unpublished manuscript. 



