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Soil erosion-productivity relationship assessment in sloping lands of north-west Himalayas*

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Title Soil erosion-productivity relationship assessment in sloping lands of north-west Himalayas*
Not Available
 
Creator B N GHOSH
P DOGRA,
N K SHARMA
K S DADHWAL
 
Subject Crop productivity loss, Relationship, Soil erosion.
 
Description Not Available
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–
Not Available
 
Date 2020-02-25T11:07:12Z
2020-02-25T11:07:12Z
2012-12-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33085
 
Language English
 
Relation Not Available;
 
Publisher Not Available