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http://krishi.icar.gov.in/jspui/handle/123456789/33085
Title: | Soil erosion-productivity relationship assessment in sloping lands of north-west Himalayas* |
Other Titles: | Not Available |
Authors: | B N GHOSH P DOGRA, N K SHARMA K S DADHWAL |
ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
Author's Affiliated institute: | ICAR::Indian Institute of Soil and Water Conservation |
Published/ Complete Date: | 2012-12-01 |
Project Code: | Not Available |
Keywords: | Crop productivity loss, Relationship, Soil erosion. |
Publisher: | Not Available |
Citation: | Not Available |
Series/Report no.: | Not Available; |
Abstract/Description: | Soil erosion inevitably reduces crop productivity but how much reduction occurs depends upon soil profile characteristics, crop grown, soil management and microclimate (Lal 1981). European researcher (Baker et al. 2007) has recently assessed the effects of soil erosion on agricultural productivity. They found that soil erosion has little impact on crop productivity. Nevertheless, they highlighted other parameters such as ecological and social impacts should be taken into account when assessing soil erosion impacts. Recent estimates of Sharda et al. 2010 have documented a productivity loss of 13.4 m tonnes of foodgrain worth rupees 111.3 billion due to soil erosion by water in rainfed area of different states of India based on modified productivity loss factor derived from potential soil erosion rates–productivity loss relationship of different soil groups (Sehgal and Abrol 1994). The basic concept of soil loss tolerance (T value) illustrates the sustainable crop productivity keeping dynamic balance between soil formation and soil erosion rates which have been estimated between 2.5 to 12.5 tonnes/ha/yr in different agroclimatic region of India depending upon soil depths and quality with soil tolerance limits of Doon valleys soils having depth of more than 1.0 m have been reported to the extent of 12.5 tonnes/ha/yr (Mandal et al. 2006).The basic links between erosion productivity relationship were soil depth and soil water content (porosity) and have given emphasis on decline of available water content due to soil erosion as major pathways for productivity decline (Lal 1981). Permanent reductions in crop productivity of hilly soils are caused mainly by changes in soil physical properties, especially poor soil water retention (Prakash et al. 2004). We hypothesized that the selected soil quality parameters were negatively affected by the soil erosion level of the experiment within the treatments and were adjudged as basis for selection of treatment for relationship assessment. In this paper attempt has been made with the objective to examine (i) productivity loss with respect to critical soil properties responsible for productivity decline due to erosion below the soil tolerance level and below the lowest limit (very slight) of potential erosion rates where productivity loss due to erosion considered nil and (ii) to prepare revised erosion productivity chart based on observed and predicted (estimated) productivity loss in recent alluvial soils of Uttarakhand. A fixed plot field study was carried out for four years (2007-08 to 2010-11) at Central Soil and Water Conservation Research and Training Institute, Research Farm, Selakui, Dehradun, Uttarakhand on 2% slope. The soils of the experimental sites were classified as fine mixed hyperthermic family of Typic Udorthent and slightly acidic in nature having pH 5.8, organic carbon 6.0 g/kg, and available N, P and K as 270, 24 and 110 kg/ha, respectively. The soils were silty clay loam in texture having 12.5% clay and 35.5% silt with bulk density 1.36 Mg/m3 and basic infiltration rate of 1.42 mm/hr. The total rainfall for the study period varied from 1 510– |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Research Paper |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Indian Journal of Agricultural Sciences |
NAAS Rating: | 6.21 |
Volume No.: | 82(12) |
Page Number: | 1068- 71 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | Not Available |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/33085 |
Appears in Collections: | NRM-IISWC-Publication |
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