| Table 4.04 :Losses of Fertility of Soil by Intensified Crop | |||||||||
| Cultivation from 1967-68 to 1997-98 | |||||||||
| Agro Ecological | Types of | Increase of | Losses of Soil | ||||||
| Zone | Land | Cropping | Fertility | ||||||
| Intensity (%) | (%) | ||||||||
| 1 | 2 | 3 | 4 | ||||||
| OHP(1) | HL | 100 | 25-45 | ||||||
| TF(2) | HL | 100 | 10-35 | ||||||
| TMF(3) | HL | 100 | 10-40 | ||||||
| OBF(9) | MHL | 100 | 25-65 | ||||||
| HGRF(11) | HL | 100 | 20-45 | ||||||
| MMRF(16) | MLL | 100 | 15-40 | ||||||
| SKF(20) | MLL | 100 | 20-40 | ||||||
| NEP(22) | HL | 100 | 20-70 | ||||||
| CCP(23) | HL | 100 | 10-30 | ||||||
| BT(26) | HL | 100 | 30-60 | ||||||
| MT(28) | HL | 100 | 40-65 | ||||||
| Source: Committee report for losses of soil fertility, 2004, BARI | |||||||||
| Note: | |||||||||
| HL : High Land, MHL : Medium High Land, MLL: Medium Low Land | |||||||||
| OHP =Old Himalayann Piedmont | HGRF =High Ganges | CCP = Chittagong Coastal Plain | |||||||
| Plain | River Floodplain | BT =Barind Tract | |||||||
| TF =Tista Floodplain | MMRF=Middle Meghna | MT=Madhupur Tract | |||||||
| TMF =Tista Meander Floodplain | River Floodplain | NEP=North Eastern | |||||||
| OBF=Old Brahmaputra Floodplain | SKF=Surma Kushiyara | Piedmont Plain | |||||||
| Floodplain | |||||||||