BULLETIN" 238, U. S. DEPARTMENT OF AGRICULTURE. 



Table III. — Comparison of the harvest stands and the yields of sugar beets for the seasons 



of 1910, 1911, and 1912. 



Refer- 

 ence No. 



Plat and season. 



Notes. 



Harvest 

 stand. 



Yield per 

 acre. 



1 



Group 1. — Deep sandv loam: 

 Plat B (1911) * 



Deep, well-manured soil; crops rotated; 

 owned and worked by experienced 

 truck farmer. 



Rather deeply worked, well-manured soil, 

 in good tilth; crops rotated; Nos. 2 and 

 5 in same field — very uniform, contigu- 

 ous to the field in which Nos. 4 and 6 

 are located. 



Deeply worked soil, in fine tilth; crops ro- 

 tated: owner's labor and supervision. 



Very deeply worked, well-manured soil; 

 crops rotated; blocking and thinning 

 done by contract, all other labor done 

 by owner; Nos. 4 and 6 in same field — 

 very uniform. 



Same as No. 2, except that seed was sown 

 rather deeper, resulting in more damp- 

 ing-off in the spring. 



Same as No. 4, except that seed was sown 

 rather deeper, resulting in more damp- 

 ing-off in the spring. 



Soil not plowed so deeply as in Nos. 2, 4, 

 5, and 6, but more sandy; owner's labor 

 and supervision. 



do 



Per cent. 

 76.83 



50.54 



49.66 

 46.99 



38.57 



37.19 



77.11 



68.20 

 64.41 



60.26 

 59.82 



52. 48 



63.13 



60.12 

 52.30 



4S. 12 



1.5. 71 

 45.62 



45.51 

 39. 58 



37. <is 

 29.55 



Tons. 

 30 532 



2 



Plat 3 (1912) 



23 696 



3 



PlatD (1911) 



9 fi 773 



4 



Plat 1(1912) 



27 524 



5 



Plat4 (1912) 



19 431 



6 



Plat 2 (1912) 



19 406 





Group 2. — Very light sandy 

 loam: 

 Plat 5 (1912) 



23 631 



8 



Plat 6 (1912) 



20 853 



9... 



Plat A (1911) 



Very badly thinned, spacing irregular, 

 6.89 per cent of the plants in pairs; 

 choked with weeds; labor mostly done 

 by young boys without supervision. 



Plants tardy in the spring, owing to late 

 sowing; soil in good tilth; owner's labor; 

 good farmer. 



Second sowing: plants rather tardy in 

 the spring; soil in good tilth; owner's 

 labor; good farmer. 



Much of the work done by boys, with lit- 

 tle supervision. 



Ground not plowed, only disked and har- 

 rowed; severe hailstorm in mid- August 

 defoliated the beets. 



Owner's labor; conditions about normal. . . 



Land in good tilth; too much contract 

 labor; 2.56 per cent of the plants in pairs. 



Sowed and thinned rather late, thinning 

 badly done; 9.S2 per cent of plants in 

 pairs; contract labor. 



Contract labor; soil plowed about 8 inches 

 deep; other conditions normal. 



Soil in good tilth, heavily manured, 

 deeply plowed; Japanese working for 

 themselves. 



13 391 



10.. . 



Plat8(1912) 



17 236 



11 



Plat7(1912) 



17.068 



12.. . 



Plat 9 (1912) 



13.926 



13 



Group 3. — Heavy black 

 loam: 

 Plat 10 (1912): 



9.558 



14 



Plat 11 (1912) 



15. 2.53 



15.. .. 



Plat E (1911) 



15. 497 



16.. . 



PlatF (1911) 



12.325 



17 



Plat 1 (1910) 



13.032 



18 



Plat G (1911) 



17.306 



19 



Plat2(1910) 



13. 469 



20 



Plat 3 (1910)... 



do 



11.686 



21 



Plat 12 (1912) 



Contract labor; conditions about normal. . 

 Contract labor; 2.03 per cent loss by cutting 



an irrigation ditch through the plat: 



other conditions normal. 



11.733 



22 



Plat 13 (1912) 



10. 314 





Mean of group 1 







49.96 

 63. 71 

 ir.. 76 

 52.26 



24. 562 





Mean of group 2 . . 





17.684 









13.007 









17. 432 











SOURCES OF LOSS IN STAND. 



Sources of losses of great magnitude in the stand are brought to 

 light by an examination of the data presented in 'Fable II. The 

 factors directly causing a decrease in the number of plants to the 

 acre were found to be susceptible of arrangement into three groups, 



