EVALUATION OF SOIL FERTILITY, SALINITY STATUS AND PRE & POST MONSOON UNDERGROUND WATER QUALITY OF COASTAL REGION OF SOUTHERN SAURASHTRA OF GUJARAT 3406
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Date
2021-09
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Abstract
An attempt has been made to study the chemical properties of soil and quality
of irrigation water by collecting twenty surface soil sample (0-15 cm) and forty pre monsoon and post monsoon underground water samples of wells/tube wells at an
interval of 0-5, 5-10, 10-15 and 15-20 km from sea coast from each taluka viz., Ghogha,
Bhavnagar, Mahuva and Talaja talukas of Bhavnagar district, Rajula and Jafarabad
talukas of Amreli district, Sutrapada, Kodinar, Una and Veraval talukas of Gir Somnath
district and Mangrol & Malia talukas of Junagadh district of coastal region of Southern
Saurashtra of Gujarat during the 2019.
The soil samples were analyzed for determination of soil fertility parameters viz.,
N, P, K, S and micro nutrients (Fe, Mn, Zn, Cu and B). The results revealed that the
available N, P2O5 and K2O content in soil increased with increased in distance from sea
cost. The overall mean values of available N in soil were observed 253, 253, 283 and
301 kg ha-1
, available P2O5 15.78, 22.53, 24.21 and 19.44 kg ha-1
and available K2O
313, 334, 334 and 288 kg ha-1
at 0 to 5 km distance from sea coast, while, the overall
mean values of available N in soil were observed 365, 322, 359 and 365 kg ha-1
,
available P2O5 32.80, 34.94, 32.85 and 23.37 kg ha-1
and available K2O 432, 501, 470
and 362 kg ha-1
at 15 to 20 km distance from sea coast in Bhavnagar, Amreli, Gir
Somnath and Junagadh district, respectively.
In respect of micronutrients, overall mean values of available Fe content in soils
of Southern Saurashtra coastal region were 4.34, 4.77, 5.61 and 6.35 mg kg-1
at 0-5, 5-
10, 10-15 and 15-20 km distance from seacoast. The overall mean values of Mn content
in soils of Southern Saurashtra coastal region were 9.62, 10.43, 11.43 and 13.29 mg kg 1
at 0-5, 5-10, 10-15 and 15-20 km distance from seacoast. The overall mean values of
available Zn content in soils of Southern Saurashtra coastal region were 0.44, 0.51, 0.65
and 0.85 mg kg-1
at 0-5, 5-10, 10-15 and 15-20 km distance from seacoast. Overall mean
values of Cu content in soils of Southern Saurashtra coastal region were 0.88, 0.99, 1.12
and 1.40 mg kg-1
at 0-5, 5-10, 10-15 and 15-20 km distance from seacoast. Overall mean
values of available B content in soils of Southern Saurashtra coastal region were 4.60,
3.55, 3.03 and 2.36 kg ha-1
at 0-5, 5-10, 10-15 and 15-20 km distance from sea coast