26 



CONSERVATION RESEARCH REPORT 5, U.S. DEPT. OF AGRICULTURE 



Table 18. — Effect of soil moisture level and fertilizer on the stage of plant development on August 13, 1957, 



and August 12, 1958 



[Numerical rating: (1) late boot stage; (2) beginning to head; (3) partially headed; and (4) headed and blooming] 



Plant Development Data 



Year 



Fertilizer 

 treatment 





Plant 



rating for moisture level of — 





Average 

 for all 





M, 



M 2 



M 3 



M 4 



M 6 



M 6 



moisture 

 levels 





F, 



2.8 

 1.8 

 2.8 

 2.5 

 2.8 

 3.2 



2.5 

 1.8 

 1.5 

 2.0 

 3.2 

 2.8 



2.2 

 1.2 

 1.2 

 1.5 

 2.0 

 2.2 



2.0 

 1. 

 1.5 

 1.5 



2.2 

 2.0 



2.8 

 1.2 

 1.2 

 1.5 

 2.5 

 2.5 



1.8 

 1.2 

 2.2 

 1.2 

 2.2 

 1.5 



2.4 





F 2 



1.4 





F 3 



1. 8 



1957 ._. . 



F 4 



1.7 





F 6 



2. 5 





F 6 



2.4 









Average 





2.6 



2.3 



1. 8 



1. 7 



2.0 



1.7 



2.0 





/ 







F, . 



3.3 

 2.0 

 3.5 

 3.5 

 3.8 

 4.0 



2.8 

 1.8 

 3.3 

 3.3 

 3.5 

 4.0 



3.0 

 1.3 

 2.5 

 3.3 

 3.5 

 3.8 



3.3 

 1.3 

 3.3 

 3.8 

 3.5 

 3.3 



3. 

 1.5 

 3.0 

 3.3 

 3.8 

 3.5 



3.0 

 1.8 

 3.3 

 3.3 

 3.8 

 3.5 



3. 





F 2 



1.6 





F 3 



3. 1 



1958 



F 4 



3.4 





F s 



3. 6 





F 6 



3.7 









Average 





3.3 



3. 1 



2.9 



3. 



3.0 



3. 1 



3. 1 









Analysis of Variance 





Component 



Degrees of 

 freedom 



Mean squares 1 





1957 



1958 



Moisture (M) .. 



5 

 15 



5 

 25 

 90 



3. 40** 



.47 

 5. 00** 



.45 



.38 



0. 60 



Error (a) 



. 40 



Fertilizer (F) ... . . ... 



14. 20** 



M X F _.. 



. 04 



Error (b) 



. 29 









Total 



143 















i**= Significant at the 1-percent level. 



