Influence of lime and farm yard manure

4.3 Yield evaluation

4.3.1 Length of tap-root at harvesting time (cm)

The results obtained on tap-roots length at harvesting time in different plots as per 7 treatments are presented on the appendix 5 while the mean lengths are presented on the following figure:

Erreur ! Source du renvoi introuvable.

Figure : Length of tap-roots at harvesting time in the study zone

It was observed that the mean length vary from 11.5cm to 17.1cm with the general mean of 15 cm .The T₃ shows the highest value while T₆,T₅,and T₁ represents the middle values.

The lowest values were observed from T₄ and T₀.The analysis of variance below indicates whether this difference observed between treatments is significant.

Tableau : Analysis of variance for tap-root length at harvesting time

Source of variation	DF	S.S	M.S	F Ratio	F Table at 1 %
Total Block Treatment Error	27 3 6 18	128.488 2.034 119.743 6.7107	4.758 0.678 19.957 0.372	1.83 53.5309	5.09 4.01

C.V%=4.06

From the table above, there is a significant different between treatments at 1% threshold as the value of F ration is greater than the value of F Table at 1 % threshold. The difference observed between blocks is not significant as the F ratio is lower than the value of F .table at the same threshold.

Table : Mean separation of tap-root length at harvesting time

Treatment	Mean length	Homogeneous groups
T2 T3 T6 T5 T1 T4 T0	16.9 17 17.1 15.7 13.9 13 11.5	A A A B C C D

The table above shows that the treatments are classified into 4 groups(A,B,C,D).the group A(T₂, T₃and T₆) shows the best results .The group B represents T₅ while group C is for T₁ and T₄.The lowest value is observed on T₀.

The highest values for group A and B (T₂,T₃,T₆ and T₅) is due to the supply of Nitrogen and Phosphorus from application of FYM and the liberation of phosphorus by application of lime (Russel,1980).

4.3.2. Tap-root diameter (cm) at harvesting time

The results obtained on taproot diameter at harvesting time as per 7 treatments are presented on appendix 6 while the mean tap root diameters are presented in the following figure:

Erreur ! Source du renvoi introuvable.

Figure : Tap root diameter at harvesting time in the study zone

From the figure above, it is observed that the mean diameter vary from 2.7cm to 4.4cm with general mean of 3.5 cm.T₃,T₂ and T₆ show the highest values ,followed by T₅,T₄,T₁ and lastly T₀.The ANOVA test below shows whether the difference between treatments is significant.

Table : ANOVA test for tap-root diameter

Source of variation	DF	S.S	M.S	F.Ratio	F.Table at 1%
Total Block Treatment Error	27 3 6 18	11.444 0.0414 11.0642 0.3385	0.423 0.0138 1.844 0.0188	2.02 98.038	5.09 4.01

CV: 3.88

The above table shows that the difference between treatments is significant at 1 % threshold as the F ratio is greater than F Table at 1 % threshold. The difference observed between blocks is not significant as the F ratio is lower than the value of F .table at the same threshold.

Table : Mean separation of tap-root diameter at harvesting time

Treatment	Mean	Homogeneous groups
T3 T2 T6 T5 T1 T4 T0	4.4 4.2 3.9 3.6 3.2 2.7 2.7	A A B C D E E

The mean separation table above classifies the treatments into 5 homogeneous groups.T₃ and T₂ are classified into group A, T₆ into group B,T₅ into group C,T₁into group D, T₄ and T₀ into group E. The T₃ and T₂ show the best results, followed by T₅ and T₆.This is justified by the supply of Phosphorus from FYM and the liberation of Phosphorus by application of lime, which is essential nutrients for root development (Russel, 1980).