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SOIL PROFILE CHARACTERISTICS AND LEAF NUTRIENT STATUS IN RELATION TO SOIL NUTRIENT STATUS OF MANGO ORCHARDS

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Title SOIL PROFILE CHARACTERISTICS AND LEAF NUTRIENT STATUS IN RELATION TO SOIL NUTRIENT STATUS OF MANGO ORCHARDS
 
Creator PRASAD, K. R. K
 
Contributor RAMALINGAM, C.S
 
Subject SOIL, PROFILE, CHARACTERISTICS, LEAF, NUTRIENT, STATUS, RELATION, SOIL NUTRIENT, STATUS, MANGO ORCHARDS,
 
Description With a view to surveying the soil profiles of mango
orchards and to correlate the soil nutrient status with the
corresponding leaf nutrient status, the present investigation was
carried out in mango orchards of Fruit Research Station,
Sangareddy, Andhra Pradesh, during 1986-87. The study was also
aimed at finding out deficiency of nutrient elements, if any. For
this purpose 30 soil profiles were dug, with half of the profiles
dug near the tree and the remaining half away from the tree, from
five blocks where cultivars Benishan, Royal Special, Mahmooda
Vikarabad, Navaneetham and Manjira were being grown. From each
profile four soil samples at 0-25, 25-50, 5Q-75 and 75-100 em
depths were collected and the leaf samples were collected
simultaneously from the trees near to which soil profiles were
dug. The soil samples were analysed for physico-chemical
characteristics and available N,P2o5 and K2o, Ca, Mg and available
Fe, Cu, Mn and Zn contents. Similarly leaf samples were also
analysed for the above nutrient elements.
The results showed that the texture of the soil varied
from sandy l9am to clay with no salinity problem and low to medium
organic carbon status, while the soil reaction was neutral to
slightly alkaline. The soils were found to be low to medium in
available N content~ poor in available P2o5 content~ medium in
available K2o content~ high in Ca and Mg content~ above marginal
in available Fe, Cu and Mn contents and deficient in available Zn
content. Regarding distribution of nutrients at different depths,
the surface soil (0-25 em) .. contained significantly higher
amounts of soil N, P2o5, Ca, Fe and Cu contents than did the
remaining depths. However, in case of soil Mg content, the lower
depths were found to have higher content than the surface soil and
in case of soil K2o, Mn and Zn contents, there were no significant
differences among the depths. Slightly higher values were
recorded in blocks two and four when compared to other blocks for
soil N, K2o, Ca and Mg, while the reverse was true for soil :P2_05,
Fe, Cu, Mn and Zn contents.
With reference to the nutrient status of the soil in
relation to the proximity to the mango tree, it was found that the
soil samples collected away from the tree had significantly higher
soil N, Ca, Mg, Fe and Zn contents than the soil samples collected
near the drip region of the tree. ~owever, there were no
significant differences between these two types of samples with
respect to soil P2o5 , K2o, CU and Mn contents.
Regarding leaf nutrient status of the samples surveyed,
it was found that almost all the leaf samples contained sufficient
amounts of all the nutrients except Zn content, with only a few
exceptions. However, the Zn status of mango leaves was in
deficient range of 8.7 to 15.7 ppm, with a mean value of 11.6 ppm.
The mango cultivars under study were statistically an par with one
another in respect of leaf N, P,
However, the cultivars were
K, Ca, Mg, Cu and Zn contents.
found to differ significantly
regarding leaf Fe and Mn contents, with cultivars Manjira,
Mahmooda Vikarabad and Benishan recording significantly higher
mean leaf Fe and Mn contents than cultivars Navaneetham and Royal
Special.
In respect of the relationship of soil nutrient status
with the corresponding leaf nutrient status in mango orchards it
was found that there were no significant correlations between soil
nutrient status at four depths and leaf nutrient status for N and
Zn nutrients. However, soil nutrient status at the four depths
was significantly correlated with the corresponding leaf nutrient
status in case of Ca, Mg and CU nutrients. Similarly sign:~icant
positive correlations were noticed between soil P 2o5 at 0-25 em
depth and leaf P content; soil K2o at 0-25 and 25-50 em depths and
leaf K content.
Typical Zn deficiency symptoms were observed in almost
all the mango cultivars investigated at F.R.S., Sangareddy. The
symptoms were more pronounced in the case of cultivars Benishan
aoo Navaneetham. The deficiency symptoms are in confirmity with
those reported by many authors and also with the deficient range
of leaf Zn content obtained in all the cultivars in the present
study.
 
Date 2016-07-30T11:41:20Z
2016-07-30T11:41:20Z
1988
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/70241
 
Language en
 
Relation D2916;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD