Experimental Work in Dry-Farming 



621 



TABLE LXXVII. 



CORN ; DEPTH OF PLANTING TEST, SULPHUR SPRING 

 VALLEY DRY-FARM, 1915 



1 — Immature. 



Five plots of White Flint corn, planted May 15 in rows thirty-six 

 inches apart, were thinned to distances varying from twelve to 

 thirty-six .inches apart in the roAv. One plot was not thinned, serv- 

 ing as a check. Table LXXVIII indicates the importance of not 

 having dry-farmed plants too close together. 



TABLE LXXVIII. CORN ; SPACING TEST, SULPHUR SPRING 

 VALLEY DRY-FARM, 1915 



From the first the difficulty of moisture conservation in south- 

 ern Arizona has been manifest, and opinions regarding the amount 

 of cultivation necessary vary greatly. Table LXIX records a test 

 in which six plots of Ranch White corn, planted July 31. were cul- 

 tivated eight times or less. WHiile moisture is not easily conserved, 

 the results indicate the desirability of frequent cultivations, best 

 yields having been obtained from the plot cultivated five times. 



To determine the advantage of the use of organic fertilizers, 

 two corn plots were covered with barnyard manure early in the 



