﻿WATER UTILIZATION BY SPRING WHEAT. 



19 



ference between plats A and B in water stored. Plat C or D has 

 always stored considerably more water than the other two plats. 



AVERAGE OF RESULTS FOR ALL STATIONS. 



The data from the individual stations demonstrate that the storage 

 and use of water by the wheat crop are somewhat different at the 

 individual stations. There are, however, enough points in common 

 between the different stations to permit general deductions to be 

 made from the data as a whole. 



For this purpose the water content and use at all stations, as in- 

 dicated by the symbols, are brought together in a composite table. 

 It must be recognized that this composite table shows a greater per- 

 centage of water use in the lower depths than actually exists. The 

 data on the fifth and sixth foot sections of soil are largely from 

 stations where water has been used to that depth. The inclusion of 

 the lower depths at stations like Edgeley, Belle Fourche, Huntley, 

 and Scottsbluff would greatly increase the number of cases where 

 no water was used in these foot sections, the soil being either wet 

 or dry. 



The data from the individual foot sections of soil at the different 

 stations are grouped together in Table 2. In the upper part of the 

 table the data are presented by cases, the figures under each symbol 

 indicating the number of times that symbol was used in Table 1 for 

 the purpose of indicating the water relations of that plat at the 

 depth indicated. In the lower part of the table these figures are 

 reduced to percentages in order to make the different foot sections 

 of soil more directly comparable. For example, plat A has 135 

 determinations of the first foot and only 72 of the sixth foot. A 

 comparison of the two sections in regard to the proportion of the 

 time a particular symbol has been used is more readily made when 

 they are expressed as percentages. 



Table 2. — Recapitulation of Table 1, showing the number of times each symbol 

 was used in describing the use of water in each foot section of each plat. 



[The first part of the table records the number of cases studied; in the second part these are expressed 



as percentages of the totals.] ._ 





Instances of the use of each symbol as indicating the w 



ater relations 



on plats A, B, 













and C or D. 







Symbol use at depth 





















indicated (foot sec- 





K 





PW. 





PD. 



ow. 



OD. 



Total. 



tions of soil). 























A. 



B. 



Cor 

 D. 



A. 



B. 



Cor 

 D. 



A. 



B. 



C or 

 D. 



A. 



B. 



Cor 

 D. 



A. 



B. 



Cor 

 D. 



A. 



B. 



Cor 

 D. 



Times used: 









































1.. 



101 



98 



107 



14 



14 



15 



19 



22 



10 



1 



1 



1 















135 



135 



133 





2.. 



58 



57 



107 



14 



17 



18 



52 



47 



8 



1 











10 



14 







135 



135 



133 



Section 



3,. 



30 



27 



90 



8 



8 



11 



39 



45 



14 











1 



45 



42 



3 



122 



122 



120 



4.. 



5 



9 



45 



11 



7 



18 



28 



26 



29 



3 



3 



2 



56 



57 



11 



103 



102 



105 





5.. 







3 



11 



5 



3 



28 



14 



11 



18 



6 



13 



13 



56 



52 



18 



81 



82 



86 





6.. 







1 



1 



4 



1 



21 



5 



5 



10 



14 



17 



23 



49 



48 



27 



72 



72 



82 



Relation to total, per 







































cent: 









































1.. 

 2.. 

 3.. 

 4.. 

 5.. 

 6 



75 

 43 

 24 

 5 

 

 



73 

 42 

 22 

 9 



•1 

 1 



80 

 80 

 75 

 43 

 13 

 1 



10 

 10 

 7 

 11 

 6 

 6 



10 

 13 



7 

 7 

 4 

 1 



11 

 14 

 9 



17 

 32 

 26 



14 

 39 

 32 

 27 

 17 

 7 



16 

 35 

 37 



25 

 13 



7 



8 

 6 

 13 

 28 

 21 

 12 



1 

 1 

 



3 



7 

 19 



1 

 







3 

 16 

 24 



1 





 1 



2 

 15 



28 





 7 

 37 

 54 

 69 

 68 





 10 

 34 

 56 

 63 

 67 





 

 3 

 10 

 19 

 33 

























Section 



































