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Distribution of available sulphur and micronutrients (Fe, Mn, Zn and Cu) in surface and profile soils of sugarcane growing areas of South Gujarat and their mapping by GIS

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Title Distribution of available sulphur and micronutrients (Fe, Mn, Zn and Cu) in surface and profile soils of sugarcane growing areas of South Gujarat and their mapping by GIS
 
Creator Gaikwad, Ganesh K
 
Contributor Das, A
 
Subject area, sugarcane, sugar, sulphur, economic systems, sampling, clay, carbon, nutrients, alkalinity
 
Description In order to evaluate available sulphur and micronutrients (Fe, Mn, Zn and
Cu) status of surface and profile soil samples from sugarcane growing soils of
South Gujarat, four hundred fifty (total) representative GPS-referenced surface soil
samples were randomly collected based on preliminary survey covering 27 talukas
of 7 districts (Valsad, Navsari, Surat, Bharuch, Tapi, Narmada and Vadodara,
encompassing the jurisdiction area of 15 Co-op. sugar mills viz. Valsad, Gandevi,
Maroli, Bardoli, Chalthan, Sayan, Kamrej, Madhi, Mahua, Pandvai, Vatariya,
Copper, Vyara, Vodadara and Narmada) of South Gujarat. Eight pedons were
excavated in the representative sites from above area also, studied and sampling
was done horizon wise. All the collected soil samples were analyzed for
physicochemical properties (pH, EC, Org. Carbon, exchangeable cations, CEC and
silt+clay content), available major nutrients (N, P2O5 and K2O), available sulphur
(S) and DTPA-extractable micronutrients (Fe, Mn, Zn and Cu). The data obtained
from analysis were interpreted and discussed based on jurisdiction area of each
sugar factory and sugarcane grown area of South Gujarat as a whole after statistical
analysis. All the data were processed in GIS to generate the spatial distribution of
physicochemical parameters and available nutrients in map.
When 450 soil samples from entire jurisdiction area of fifteen sugar
industries of South Gujarat were considered, it was observed that overall soil pH
ranged from 6.06 to 9.53 i.e. from slightly acidic to very strongly alkaline with
overall mean value
of 8.09 (i.e. moderately alkaline reaction). 20.00 percent (90), 48.44 percent (218),
20.44 percent (92) and 0.89 percent (4) soil samples were mildly alkaline,
moderately alkaline, strongly alkaline and very strongly alkaline in reaction,
respectively i.e. major portion (> 69 percent) soils were moderately to very
strongly alkaline in reaction which might create deficiencies of plant nutrients and
so appropriate measures should be taken. Soil EC varied from 0.10 to 1.86 dS m-1
i.e. from low to medium soil salinity with mean of 0.38 dS m-1. The 97.11 percent
(437) samples exhibited low soil salinity status i.e. normal and only 2.89 percent
(13) samples belonged to medium soil salinity. SOC ranged from 1.95 to 12.60 g
kg-1 i.e. from very low to high status with mean value of 5.50 g kg-1. Nearly 43.78
percent (197) samples depicted low organic carbon status, while 32.00 percent
(144) and 24.22 percent (109) samples belonged to medium and high status
respectively. It was further observed that about 53, 23, 30, 17, 20, 23, 20, 40, 70,
80, 13, 80, 77, 67 and 43 percent soils samples respectively from Valsad, Gandevi,
Maroli, Chalthan, Kamrej, Sayan, Pandwai, Vatariya, Vadodara, Narmada, Bardoli,
Madhi, Vyara, Copper and Mahua came under low category (low productivity
potential) of SOC which called for addition of more organic inputs for sustaining
soil health and crop yield. CEC ranged from 15.74 to 63.45 cmol (p+) kg ha-1 with
mean value of 45.62cmol (p+) kg ha-1 i.e. high range of CEC for major soils of
entire sugarcane jurisdiction area of South Gujarat.
Available N ranged from 58 to 441 kg ha-1 i.e. from very low to medium
with mean value of 185kg ha-1 i.e. low status. Out of 450 surface soil samples, 326
samples (74.67%) belonged to low status and 124 samples (27.56%) showed
medium status. Available P2O5 ranged widely from 4.63 to 135.55 kg ha-1 i.e. from
very low to very high with mean value of 42.54kg ha-1 i.e. medium status. 34.00%
(153) samples were low, 37.78% (170) exhibited medium status and 28.27% (127)
belonged to high status of available P2O5. Available K20 ranged from 77 to 964 kg
ha-1 with mean of 410.49kg ha-1 high K- status in major soils probably because of
higher K-bearing minerals.
Available sulphur ranged from 0.78 to 129.75 ppm i.e. from low to high with
mean of 13.87 ppm i.e. medium status for soil samples from entire jurisdiction area.
Sugar industries when arranged based on percent soils with low available sulphur
status, the order was as follows: Kamrej (13) >Sayan (23) >Chalthan (27) >Mahua
(47) = Vyara (47) = Vatariya (47) = Maroli (47) > Vadodara (53) = Gandevi (53) =
Pandvai (53) >Madhi (60) = Valsad (60) > Copper (70) >Bardoli (73) > Narmada
(87).
In case of micronutrient distribution was concerned, DTPA-Fe ranged from
3.12 to 28.57 ppm (mean of 12.12 ppm i.e. high status), DTPA-Mn from 0.04 to
25.81 ppm (mean of 9.70 ppm i.e. medium status), DTPA-Zn ranged from 0.10 to
1.84 ppm (mean of 0.72 ppm i.e. medium status) and 81.11 percent (365) and 17.33
percent (78) samples were high and medium DTPA-Cu status respectively with its
range from 0.14 to 4.28 ppm (mean of 1.19 ppm i.e. high status).
The depth of all pedons was >130 cm indicating that soils of these entire
sugarcane areas were very deep which otherwise a good sign for optimum plant
growth of sugarcane under South Gujarat condition. Soil colour of all pedons were
dominantly very dark grayish brown (10YR 3/2) to very dark brown (10YR 2/2).
The sand, silt and clay content (
 
Date 2016-04-26T09:30:56Z
2016-04-26T09:30:56Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65584
 
Language en
 
Format application/pdf
 
Publisher NAU