Influence of lime and farm yard manure

4.2.2Heights of plants at 60 days after sowing

The results obtained on plant heights after 60 days in different plots as per 7 treatments are presented on appendix 3 while the mean heights are presented on the following

figure: Erreur ! Source du renvoi introuvable.

Figure : Heights of plants after 60 days in the study zone

From the figure 11, it is observed that the mean heights vary from 20cm to 31.5cm with the general mean of 25.8cm.T₃ shows the highest value while T2, T₅, and T₆

Are almost on the same level.T₁ and T₄ show the lower values while the lowest value is observed on T0. The ANOVA test below shows if the difference observed between treatments is significant or not.

Table : ANOVA test for plant heights at 60days

Source of variation	DF	S.S	M.S	F Ratio	F Table at 1%
Total Block Treatment Error	27 3 6 18	571.381 3.755 526.103 41.522	21.162 1.251 87.683 2.306	0.54 38.011	5.09 4.01

C.V%=5.89

The ANOVA, test above showed the significant difference between treatments at 1% threshold because the value of Ratio is greater than the value of F table at the mentioned 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 plant heights after 60 days of sowing

Treatment	Mean	Homogeneous groups
T3 T2 T5 T6 T4 T1 T0	31.5 28.5 28.6 29 20.7 22 20	A B B B C C C

The mean separation table above indicates that the treatments are classified into 3 groups (A, B, C).The group A is for treatment T₃ (20t of FYM\ha) with the best result. The group B is for T₂ (15t of FYM\ha), T₅ (2.5t of lime/ha) and T₆ (3t of lime /ha). The group C is composed by T₀ (control), T₁ (10t of FYM/ha) and T₄ (2t of lime/ha).

The highest result s from T₃ is due to the supply of plant nutrients by manure, especially Nitrogen, which is a limiting factor for plant growth.

For other groups, it is observed that ,as the dose increases, the height of plant also increases (the increase in dose for each amendment results in increase for plant heights) and this shows the effectiveness of both organic and mineral amendments in creating the favorable conditions for plant growth (Laura,1998).

4.2.3 Plant heights at 90 days after sowing

The results obtained on plant heights after 90 days in different plots as per 7 treatments are presented on appendix 4 while the mean heights are presented on the figure below:

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Figure : Heights of plants after 90 days in the study zone

It was observed that the mean heights vary from 41.8cm to 50.2 cm with the general mean of 45.2cm. T₃ and T₂ show the highest values while T₁, T₅, and T₆ Are almost on the same level with the middle values, followed by T0 and T4 with the lowest values.

The ANOVA test below show whether the difference observed between treatments is significant.

Table : ANOVA test for plant heights at 90 days

Source of variation	DF	S.S	M.S	F Ratio	F Table at 1%
Total Block Treatment Error	27 3 6 18	360.95 73.74 229.962 57.237	13.368 24.583 38.327 3.179	4.04 12.053	5.09 4.01

C.V %=3.95

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.

Table 26: Mean separation of plant heights after 90 days of sowing

Treatments	Mean height in cm	Homogeneous groups
T3 T2 T5 T6 T1 T4 T0	50.2 48.1 45.5 45 43.8 41.5 41.8	A A B B BC C C

The mean separation table above classifies the treatments into 4 homogeneous groups(A,B,BC,C).The group A represents T₂ and T₃ with the best results (15t/ha and 20t/ha of FYM). The group B is for T₅ and T₆, which have received respectively 2.5t/ha and 2t/ha of lime. The third group (BC) is for T₁ (with 10/ha of FYM) and the last group is for T₄ and T₀, which have received respectively 2t /ha of lime and control. The best results from group A depends on the supply of plant nutrient from FYM, especially nitrogen, which is the limiting factor for plant growth. For group B, BC, and C, the treatments seem to have almost the same performance.