Influence of lime and farm yard manure

4.3.3 Yield of Carrot taproot at harvesting time

The results obtained on carrots tap root yield in different plots as per 7treatments are presented on appendix 7 while the mean yields are presented on the following figure:

Erreur ! Source du renvoi introuvable.

Figure : Yield of taproot at harvesting time in the study zone

It was observed that the mean yields vary from 121t/ha to 26.5t/ha with the general mean of 19.4t/ha.According to Grabben (2004), the yields obtained from plots are around the average yield obtained all over the world, which is 21t/ha. The ANOVA test below indicates whether the difference between treatments is significance.

Table : ANOVA test for yield of taproots at harvesting time

Source of variation	D.F	S.S	M.S	F Ratio	F Ratio at 1%
Total Block Treatment Error	27 3 6 18	792.73 9.8067 769.442 13.48	29.36 3.268 128.24 0.748	4.37 171.23	5.09 4.01

C.V=4.45

From the table above, the ANOVA test shows that there is a significant difference between treatments at 1% threshold as the value of F Ratio 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

Tableau : Mean separation of yields at harvesting time

Treatment	Mean	Homogeneous groups
T2 T3 T6 T5 T1 T4 T0	25.6 26.5 22.5 19.3 15.5 14.4 12.1	A A B C D D E

The table above shows that the treatments are classified into 5 groups ((A, B, C, D and E).The group A is for T₂, and T₃.The group B is for T₆, group C is for T₅ while T1 and T₄ are in group D. The last group is for T0 (control).It is observed that T₂ and T₃ are the best treatments, followed by the treatments T₅ and T₆. This testifies the role of both organic and mineral amendments in improving plant growth conditions (Russel, 1980).For treatments T₁ and T₄, there is no significant difference and the lowest value is for the treatment that has not received any amendment (T₀).