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Soil Fertility Under Homegarden Trees and Native Moist Evergreen Forest in South Andaman, India

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Title Soil Fertility Under Homegarden Trees and Native Moist Evergreen Forest in South Andaman, India
Not Available
 
Creator C. B. PANDEY
LALITA SINGH
 
Subject exchangeable cations, nutrient pool size, soil depth, soil texture, tree canopy positions
 
Description Not Available
This study describes variations in organic C; total N and P; mineral
N and P; and exchangeable K, Ca, and Mg; and microbial biomass C in soils in relation to leaf litter and root biomass in three
depths (0 to 10, 10 to 20, and 20 to 30 cm) at two canopy positions
(under canopy and between canopy) of three 20-year-old homegarden trees: coconut palm (Cocos nucifera L.), clove (Eugenia
cariophyllata Thunb), and nutmeg (Myristica fragrans Houtt.
Nees) spice trees in South Andaman island of India. Control soils
were sampled from an adjacent open plot. Concentrations of the
nutrients under the trees were compared with that found in the
native evergreen forest to evaluate several components of the sustainability of the homegarden agroecosystem. Organic C, total N,
total P, exchangeable NH4+, NO3−, exchangeable K, Ca, and Mg
were higher in the under canopy and between canopy positions of
all the homegarden trees than that in the open plot. In addition,
these values were higher under the spice trees than that under the
coconut palm. All the elements, except Ca and Mg, were highest in
the surface soil (0 to 10 cm) and decreased with the depth in all
the treatments. Microbial biomass C was inversely related to the
depth, and was the highest (454 μ/g−1) under coconut and the
lowest (306 μ/g−1) under clove. Litter production was higher under
the palm than under the spice trees, but concentrations of elements
in the litter biomass were higher in the latter. Concentrations of
nutrients (N, P, K, Ca, and Mg) in the forest litter and roots were
well within the range found in the litter and roots of the homegarden trees. These seem to be reasons why homegardens in the islands
are sustainable.
Not Available
 
Date 2019-07-24T10:25:47Z
2019-07-24T10:25:47Z
2009-01-01
 
Type Research Paper
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/21700
 
Language English
 
Publisher Taylor & Francis