| dc.description.abstract | Soil erosion and its effects on soil productivity of a
humic nitisol was studied during 1987 second season and
1988 first season .. The runoff plots which·measured
10 m x 2 m were set up at two different slopes of 10% and
16%. The treatments were maize/beans intercrop and bare
land (control) in three replicates. The amount of
rainfall was recorded for each rainfall storm event. In
addition, the volume of runoff for each effective storm
was recorded. For both the runoff and eroded sediment
samples were erie l.ysed for the nutrient ni trogen,
organic carbon, phosphorus and a few bases. During the
investigation the following losses per hectare were
reported. Soil loss was 0.1 to 69.9 tonnes, runoff 0.13
to 48.75 mm, nitrogen 0.51 to 125.1 kg; carbon 1.3 to
252.2 kg; phosphorus 0.001 to 11.25 kg; sodium 0.119 to
7.844 kg ; Potassium 0 to 4.312 kg ; Calcium 0 to 16.417
kg ; Magnesium 0.414 to 8.640 kg. These results indicate
a great loss of soil" nutrients due to soil erosion. Also
the physical and chemical properties of the eroded
sediment were studied. Nutrient enrichment ratio for
nitrogen, phosphorus and organic carbon was> 1.0. The
particle size distribution ratio also did change. | en |
