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
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Creator |
Gaikwad, Ganesh K
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Contributor |
Das, A
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Subject |
area, sugarcane, sugar, sulphur, economic systems, sampling, clay, carbon, nutrients, alkalinity
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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 ( |
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Date |
2016-04-26T09:30:56Z
2016-04-26T09:30:56Z 2015 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/65584
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Language |
en
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Format |
application/pdf
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Publisher |
NAU
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