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A study on paddy area in UKP command in relation to soil physiography and its impact on soil properties

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Title A study on paddy area in UKP command in relation to soil physiography and its impact on soil properties
 
Creator I.Rashmi
 
Contributor G.S.Dasog
 
Subject Seed Science and Technology
 
Description An investigation in UKP command was undertaken with objective to characterise
paddy soils, to determine its spectal reflectance and to estimate paddy acerage using remote
sensing techniques. Four pedons and auger samples from three depths at 49 sites were
selected from Shorapur taluk of UKP command.
The texture was clayey throughout depth in Hunasagi and Devapur J and it was
sandyloam in Bailkunti and silty clay in Dyamnal pedons. The pH varied from 7.84 to 9.40
and 7.50 to 9.56 for pedon and auger samples indicating alkaline to strongly alkaline soil
reaction. The EC ranged from 0.50 to 3.30 and 0.11 to 2.50 dSm-1 for pedon and auger
samples. The CaCO3 ranged from 4.2 to 15.5 and 6.5 to 22.3 per cent for pedon and auger
samples. Among exchangeable cations calcium was dominant followed by magnesium,
sodium and potassium in auger and pedon samples. The CEC values ranged from 18 to 60
cmol (+) kg-1. The ESP values of auger and pedon samples were >15 per cent.
The organic carbon varied from 0.35 to 0.70 and 0.24 to 0.84 per cent respectively for
profile and auger samples. All the samples were low in nitrogen, while 63 per cent were
medium in available P and 75 per cent were high in available K.
Spectral signatures of paddy was recorded during tillering stage. NDVI was positively
correlated with both LAI and yield. However, the degree of correlation was lower in the later
due to young stage of crop. Based on supervised classification paddy covers 30541.63 ha
followed by groundnut with 4876.94 ha, 8114.45 ha is covered by jowar and cotton covers
11988.86 ha respectively. Overlaying physiography and soil vector layer on classified image
showed paddy was mainly grown on valleys as well as uplands covering Tumkur, Ulesugar,
Kupgal and Kagalgomb soil series.
 
Date 2016-10-25T16:10:42Z
2016-10-25T16:10:42Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81921
 
Format application/pdf
 
Publisher UAS, Dharwad