Review Article
Role of Earthworms in Soil Fertility Maintenance through the Production of Biogenic Structures
Table 4
Variation in nutrient concentration of earthworm casts and non ingested soils in abandoned agricultural fallows in North East India (
SE,
) [
18].
| | 5-years-old fallow | 10-years-old fallow | 15-years-old fallow | | Soil | Worm cast | Soil | Worm cast | Soil | Worm cast |
| | Organic Carbon (%) | 1.2 (.07) |
*3.5 (.09) | 1.9 (.09) | **4 (.03) | 2.2 (.13) | **5.2 (.04) | | Total Nitrogen (%) | 0.22 (.01) |
*0.55 (.02) | 0.25 (.03) | **0.59 (.02) | 0.21 (.04) |
*0.62 (.05) | | Available Phosphorus (mg/100 g) | 0.38 (.02) |
*1.1 (.05) | 0.5 (.01) | **1.8 (.07) | 0.54 (.01) |
*1.7 (.05) | | Potassium (meq/100g) | 0.24 (.01) |
*0.61 (.32) | 0.4 (.03) |
*1.0 (.05) | 0.42 (.01) |
*0.90 (.02) | | Calcium (meq/100 g) | 0.19 (.03) |
*0.60 (.03) | 0.22 (.02) | **0.75 (.01) | 0.22 (.01) |
*0.85 (.02) | | Magnesium (meq/100 g) | 0.22 (.01) |
*0.50 (.01) | 0.2 5 (.04) |
*0.60 (.01) | 0.32 (.01) |
*0.70 (.01) |
|
|
*
, **.
|
