1. EFFECTS OF DAP AND MANURE ON THE GROWTH,YIELD AND NODULATION OF A NAVY BEAN CROP A22/0061/07 SUPERVISOR:DR.G.N CHEMINING’WA. CHEMINING’WA.

2. INTRODUCTION 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.

3. PROBLEM 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.

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

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

6. Materials 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,,

7. 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.

8. RESULTS 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

9. Anova for mean height (cm) SourcedfssmssF-var.F-pr. Treatm ent 254270.2486.388 Block20.670.3353.086.388 Residu al 444.3311.08 Total899Non signific ant.

10. YIELD: Number of pods per plant Block 1 manure control Fertilizer 12 19 56 Block 2 Control Fertilizer Manure 12 40 45 Block 3 Fertilizer Manure Control 41 16 32

11. Anova for no. of pods/plant SourcedfssmssF-var.F-pr. Treatme nt 21074537.332.1556.338 Block218.639.3150.0376.388 Residua l 4997.37249.34 Total82090Non- significa nt.

12. Nodule number per plant 2- weeks 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

13. Anova for nodulation SourcedfssmssF-var.F-pr. Treatme nt 24201.552100.78555.766.388 Block260.2230.119.976.388 Residua l 415.123.78 Total84276.89Significa nt

14. L.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.

15. DISCUSSION 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.

16. CONCLUSION 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.