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• W2562166072 abstract "The potential of contour Calliandra calothyrsus hedges in combination with Napier grass(Pennisetum purpureum) hedges, in controlling runoff and soil loss, from a cropped fieldwere studied during two cropping seasons in a Nitisol soil under semi-humid conditions at theNational Agroforestry Research Project-Embu, Eastern Province, Kenya. The experimenthad eight runoff plots measuring 5 x 30 m, on a 18% slope, and was conducted in arandomized complete block design with two replicates and four treatments as follows:1) Control: only Maize; 2) Grass hedge: Pennisetum purpureum; 3) Tree hedge:Calliandra calothyrsus; 4) Combination hedge: Pennisetum purpureum + Calliandracalothyrsus. Maize and beans intercrop were planted during the first season (short rains), andmaize monocrop in the second season (long rains). Soil and water runofflosses after eachmajor rainfall event and the changes in crop cover as well as total dry matter from the twofodder types used were measured. Topographic surveys of the experimental plots werecarried out at the end of each cropping season. Rainfall intensity and changes in infiltrationrates and bulk density along the hedges were also determined.Soil losses from the plots with hedges were lower than the control, though not significant.Over the two seasons, the average cumulative soil losses from plots with tree hedge and combination hedge were 71%, and 53% lower than that of the control plot, while grass hedgeplots were higher than the control by 14%. On the other hand, water runoff losses from treehedge, combination hedge and grass hedge plots were 50%, 70% and 96%, respectively,lower than that of the control plots, although not significant (p=0.9). In both the short rainsand long rains seasons, there were no significant differences between the treatments in bothrunoff and soil loss. Likewise, Least Significant Difference carried out on the treatmentmeans for runoff and soil loss showed no significant difference among treatments. It wasconcluded that the effect of the hedges at this stage, had not become significant in reducingboth runoff and soil loss.Soil bulk density did not change while infiltration rates at the end of the experiment along thehedges were slightly higher than in the beginning of the experiment. Percentage averagedecrease in slope followed this order: combination hedge> tree hedge> grass hedge with1.83%, 1.77% and 1.74% respectively, while the control plot had a 0.67% increase in slopeangle. Total dry matter in the two lines of hedge produced 12 t/ha/yr of Napier for the grasshedge and nearly 8 t/ha/yr of Napier from the single line of Napier in the combination hedge.The fodder harvested from the tree hedge averaged 2 t/ha/yr and 0.8 t/ha/yr of stems, whilethe combination hedge produced 0.7 t/ha/yr of fodder from the tree hedge and 0.3 t/ha/yr ofstems. This indicates some extra benefits for use of hedges for soil conservation, comparedto mechanical earth structures." @default.
• W2562166072 created "2017-01-06" @default.
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• W2562166072 date "2012-05-02" @default.
• W2562166072 modified "2023-09-24" @default.
• W2562166072 title "Potential use of contour Calliandra calothyrus hedges with napier grass (Pennisctun Purpureum) for soil-erosion control in a high potential area of Embu, Kenya" @default.
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