Influence of lime and farm yard manure( Télécharger le fichier original )par Dieudonne MUGOBOKA ISAE Busogo  Bachelor's Degree 2008 
4.3 Yield evaluation4.3.1 Length of taproot at harvesting time (cm)The results obtained on taproots 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 taproots 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 T_{3} shows the highest value while T_{6},T_{5},and T_{1} represents the middle values. The lowest values were observed from T_{4} and T_{0}.The analysis of variance below indicates whether this difference observed between treatments is significant. Tableau : Analysis of variance for taproot length at harvesting time
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 taproot length at harvesting time
The table above shows that the treatments are classified into 4 groups(A,B,C,D).the group A(T_{2}, T_{3}and T_{6}) shows the best results .The group B represents T_{5} while group C is for T_{1} and T_{4}.The lowest value is observed on T_{0}. The highest values for group A and B (T_{2},T_{3},T_{6} and T_{5}) 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. Taproot diameter (cm) at harvesting timeThe 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.T_{3},T_{2} and T_{6} show the highest values ,followed by T_{5},T_{4},T_{1} and lastly T_{0}.The ANOVA test below shows whether the difference between treatments is significant. Table : ANOVA test for taproot diameter
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 taproot diameter at harvesting time
The mean separation table above classifies the treatments into 5 homogeneous groups.T_{3} and T_{2} are classified into group A, T_{6} into group B,T_{5} into group C,T_{1}into group D, T_{4} and T_{0} into group E. The T_{3} and T_{2} show the best results, followed by T_{5} and T_{6}.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). 
