EFFECTS OF DAP AND MANURE EFFECTS OF DAP AND MANURE ON THE GROWTH,YIELD AND ON THE GROWTH,YIELD AND

NODULATION OF A NAVY BEAN NODULATION OF A NAVY BEAN CROPCROP

A22/0061/07A22/0061/07

SUPERVISOR:DR.G.NSUPERVISOR:DR.G.N CHEMINING’WA.CHEMINING’WA.

INTRODUCTIONINTRODUCTION

Importance of beans • Animal protein is in high demand in Kenya today,

therefore pulses play an important role as a source of low cost protein.

Bean production in Kenya • Area under bean production in Kenya is about 1

million acres. • Beans are important in all parts of Kenya except

at the coast.• Canning beans are exported to Europe or canned

locally.

PROBLEM STATEMENTPROBLEM STATEMENT

• Most soils in Kenya have low phosphate reserves hence responses to phosphatic fertilizers are not obtained by farmers.

• Poor soil fertility is the major constraint to bean production in Kenya.

OBJECTIVE OBJECTIVE

• To investigate the effect of DAP and manure on the growth, yield and nodulation of a navy bean crop.

HYPOTHESISHYPOTHESIS

• Different nutrient treatments will have different effects on the performance of a navy bean crop.

Materials and MethodsMaterials and Methods Experimental site: University of Nairobi, Field station, Kabete.

Materials •Navy bean seeds, DAP fertilizer, Manure, Land (7mx7m)

•Experimental design: Randomized complete block design(RCBD)

•Treatments: Manure, DAP and control•Treatment combination: 3x3•Recommended agronomic practices were followed:Land preparation ,planting at the onset of rains,spacing thinning and weeding,

,

DATA COLLECTION DATA COLLECTION

1. Samples of five plants from each plot were taken and used to determine:

-Nodule number per plant and - Mean plant height

2. Seed yield was determined using the number of pods per plant.

RESULTSRESULTS

• Mean height measurements 2-weeks after emergence.(cm)

• Block 1 manure control fertilizer

• 18 13 21

• Block 2 Control fertilizer manure

• 15 20 16

• Block 3 fertilizer manure control

• 19 17 14

Anova for mean height (cm)Anova for mean height (cm)

Source df ss mss F-var. F-pr.

Treatment

2 54 27 0.248 6.388

Block 2 0.67 0.335 3.08 6.388

Residual

4 44.33 11.08

Total 8 99 Non significant.

YIELD: Number of pods per YIELD: Number of pods per plantplant

• Block 1 manure control Fertilizer

• 12 19 56

• Block 2 Control Fertilizer Manure

• 12 40 45

• Block 3 Fertilizer Manure Control

• 41 16 32

Anova for no. of pods/plantAnova for no. of pods/plant

Source df ss mss F-var. F-pr.

Treatment

2 1074 537.33 2.155 6.338

Block 2 18.63 9.315 0.037 6.388

Residual

4 997.37 249.34

Total 8 2090 Non-significant.

Nodule number per plant 2-Nodule number per plant 2-weeks after emergenceweeks after emergence

• Block 1 Manure control Fertilizer

• 35 55 4

• Block 2 Control Fertilizer Manure

• 57 4 39

• Block 3 Fertilizer Manure Control

• 1 30 50

Anova for nodulationAnova for nodulation

Source df ss mss F-var. F-pr.

Treatment

2 4201.55 2100.78 555.76 6.388

Block 2 60.22 30.11 9.97 6.388

Residual

4 15.12 3.78

Total 8 4276.89 Significant

L.S.D testL.S.D test

• Means:manure=35nodules DAP=2nodules

• t-calc=2.19

• t-table(at 0.05 probability level)=1.60

• T-calc is bigger than t-table therefore there is significant difference between the two means at 0.05 probability level.

DISCUSSIONDISCUSSION

• From the results obtained, DAP and manure had no significant effects on the yield and growth of the navy bean crop but had a significant effect on the plant nodulation.They both had a lower mean number of nodules per plant than the control experiment.

CONCLUSIONCONCLUSION

It is not necessarily economical for farmers to use DAP and manure on a navy bean crop since the two have no significant effect on yield: no of pods/plant.