-24- 



Nev. Soil Fertility Problems of Cotton in Southern Nevada . 



To learn (1) response in cotton in early maturity & total yield 

 to varying applications of N, P, & K; (2) relative merits of 

 liquid vs. dry fertilizer. 

 Agron. 34 



N. Max. Water Requirements of Cotton (Extra-Long ^ Staple, and Upland , 

 Acala 1517C) Grown on Light-Textured to Medium-Textured Soils 

 in Mesilla Valley. New Mexico . To determine (1) desirable 

 frequencies of irrigations for cotton production; (2) desirable 

 range of depths of irrigation applications for optimum produc- 

 tion with limited, & an adequate water supply; (3) effect of 

 variable depth irrigation applications; (4) utility of elec- 

 tical resistance blocks as a suitable method for determining 

 "when to irrigate"; & (5) relative use of water by single beds 

 as compared to double beds with furrow irrigation. 

 Agr. Engin. 41 



N. Mex. Development of Improved Methods and Equipment for Planting . 

 and Weed Control in Cotton Production . (1) Develop or modify 

 a planter which wills plant at a uniform depth, prevent dry 

 soil from depositing around seed; prevent void space from re- 

 maining in soil around seed; reduce lateral placement of seed 

 to a minimum. (2) Evaluate effectiveness of planter under dif- 

 ferent weather & soil conditions. (3) Learn effect of plant 

 spacing on yield & mechanical harvesting efficiency. (4) De- 

 velop or modify equipment &. methods for complete weed control. 

 (5) Learn picking efficiency of various harvesting machines & 

 techniques. 



Agr. Engin. 42 (W-24) (Also see Part 3, Section b. ) 



Okla. Development of Improved Machines and Methods for Seedbed 



Preparation Planting and Early Weed Control in Cotton Production . 

 Subproj. I-B— -To evaluate some newer tillage tools for their place 

 in seedbed preparation for cotton production; Subproj. I-C— To 

 (1) evaluate existing seed grading equipment & determine physical 

 measurements of cotton seeds; (2) evaluate performance of different 

 grades of cotton seed as to emergence & yield; (3) evaluate per- 

 formance of graded seed in now available planters & modify planters; 

 (4) evaluate planter performance in obtaining different plant pop-i 

 ulations; (5) study beneficial effects of planting seed at differ- 

 ent depths; (6) evaluate & improve present furrow openings on 

 cotton planters; (7) evaluate & improve seed bed profiles as they 

 may promote more rapid & better emergence; & (8) evaluate avail- 

 able covering devices now used; Subproj. I-D— To (l) determine 

 influence of machines & chemicals now available for early weed 

 control; (2) find influence of plant population on number of weeds 

 & ease of controlling weeds; & (3) improve seedbed profiles to 

 minimize early season weed control problem. 



Agr. Engin. 802 (S-2) (Also see Part 3, Section b.) 



