110
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1-2./
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8~.,/
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APPENDIX
119
Table 33. Significance of F-ratios for analyses of variance of soilfertility values of the 1966 Nitrogen Source Test.
Source ofvariation
Significance of F-Ratios
d.f. pH pHB P K Mg Ca CEC K Mg Ca
Replications 2 NS NS NS ** NS NS NS NS NS NS
Treatment 9 NS NS * .**. ** NS NS .** ** NS
error a 18
Depth 2 ** ** ** ** ** NS ** ** ** ** .Treatment x Depth 18 NS NS * NS NS NS NS NS NS NS
error b 40
Total 89
* Significant at 5% level.
** Significant at 1% level.
NS Nonsignificant.
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123
124
Table 37. Significance of F-ratios for analysis of variance ofexchangeable potassium for type of sample in thePenncrossFerti1ity Test.
Source of variation d.f. Significance ofF-ratios
Blocks 2 NS
Potassium Rate 2 **Error a 4
Type of sample 2 **Potassium rate x Type 4 **
of sample
Error b 12
Total 26
** Significant at 1% level.
NS Nonsignificant.
125
Table 38. Significance of F-ratios for analysis of variance ofexchangeable potassium for type of sample in the 1971Nitrogen Source Test.
Source of variation d.f. Significance ofF-ratios
Blocks 3 NS
Fertilizer Ratio 2 **Error a 6
Type of Sample 2 **Fertilizer ratio x Type 4 NS
of sample
Error b 18
Total 35
** Signifcant at 1% level.
NS Nonsignificant.
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126