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IV. SUGAR CROPS 

 A. Beets 



Colo. Utilization of Labor in the Production of Sugar Beets , 



Northeast Colorado . Learn (1) month-by-month patterns of 

 labor; (2) how patterns vary with extent of mechanization; 

 (3) shift in labor use resulting from mechanization; (4) 

 length &. seasonality of shifts for family & workers; (5) how 

 patterns of labor use vary with size of operation, tenure, 

 etc.: (6) changes in types of hired workers used in mech- 

 anized & nonmechanized methods; (7) labor supply & recruit- 

 ment problems for skilled & unskilled; (8) changing role of 

 sugar beet companies, grower associations, public agencies, 

 etc., in recruitment; (9) changes in labor; (ID) general 

 changes in labor use from comparison with surveys of pre- 

 vious years & with less mechanization. 

 Agr. Econ., Agron. 97 Coop. ARS 



Colo. The Effects of Previous Cropping Practices on the Inci- 



dence of Root Diseases of Sugar Beets . To learn (1) effects 

 of previous cropping practices on development or -suppression 

 of said diseases, (2) effect of crop residue on soil microbio- 

 logical populations, (3) value of control measures for pre- & 

 post-emergence damping-off with application of crop residues 

 to soil at time of planting. 



PI. Path., Agron. 231 (W-38) (Also see Part 17, Section a.) 



Mich. A Study of Soil Conditions as Influenced by Crop Rotation . 



Tillage Methods and Plant Nutrient Supply on the Yield and 

 Quality of Sugar Beets and BeansT To investigate: (l) in- 

 fluence of crop sequence & tillage practices on soil porosity 

 & aggregates. (2) best plant nutrient ratio for different 

 soil types, (3) most profitable rate of fertilizer applica- 

 tion, (4) need for minor elements as indicated by growth char- 

 acteristics & yield, (5) need for additional nitrogen as re- 

 lated to cropping system, etc., (6) effect of plowing under 

 of green manures compared with perennial sods on the physical 

 condition of soil & crop yields, (7) use of segmented or whole 

 seed in cropping systems, & (8) value of different tillage 

 implements in preparing suitable seedbed. 

 Soil Sci. 23 



