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NUTRIENT STATUS OF SOILS IN MAIZE GROWING AREAS IN CHITTOOR DISTRICT OF ANDHRA PRADESH

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Title NUTRIENT STATUS OF SOILS IN MAIZE GROWING AREAS IN CHITTOOR DISTRICT OF ANDHRA PRADESH
 
Creator SAGAR KUMAR REDDY, R.V
 
Contributor SREENIVASULU REDDY, KOTU
 
Subject nutrients, maize, genetic soil types, irrigation, sampling, concentrates, crops, yields, carbon, planting
 
Description The present investigation was carried out to study the nutrient status in maize grown soils of Chittoor district in Andhra Pradesh. For this purpose, ninety holdings belonging to three different soil orders such as Alfisols, Inceptisols and Vertisols with standing maize crop at flowering stage (60 DAS) were selected. The soil samples were collected from 0-30 cm depth. The plant samples were also collected in the fields from which soil samples were drawn.
The soil samples were analyzed for their physical and physico-chemical characteristics viz., soil texture, bulk density, pH, EC, OC and free calcium carbonate and chemical characteristics viz., available N, P, K, Ca, Mg, S, Zn, Cu, Fe, Mn and B. Similarly plant samples were analysed for nutrient concentration (N, P, K, Ca, Mg, S, Zn, Cu, Fe, Mn and B) in index leaf tissues and also nutrient uptake in whole plant at 60 DAS (flowering stage) of maize crop. Ultimately, yield was recorded at harvest.
The soils were neutral to moderately alkaline in reaction, non-saline and low to medium in organic carbon. All the soils were non-calcareous in nature.
The available nitrogen and phosphorous in maize grown soils were low to medium and available potassium was medium to high. All the maize grown soils were sufficient in Ca and Mg whereas 40.00, 63.33 and 76.67 per cent samples in Alfisols, Inceptisols and Vertisols, respectively deficient in available S.
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The available Fe, Mn and Cu were found to be above their respective critical limits while 13.33 per cent samples in Inceptisols were found to be deficient in available Zn. Further, 23.33, 13.33 and 3.33 per cent samples in Alfisols, Inceptisols and Vertisols, respectively, were found to be deficient in available boron.
Nitrogen, phosphorus, potassium, calcium, magnesium and sulphur contents in the index leaf samples were found to be in sufficient range. Iron, manganese, copper and boron contents in the index leaf samples were found to be sufficient whereas Zn content was found to be low to sufficient.
Maximum uptake of N and P was noticed in maize crop grown in Vertisols while maximum uptake of Ca and S were observed in maize crop grown in Alfisols. Further, maximum uptake of Fe, Zn, Mn and B were registered in maize crop grown in Vertisols while maximum uptake of Cu was registered in maize crop grown in Inceptisols.
Dry matter production of maize crop at flowering stage did not show much variation among the three soil orders. The highest cob yield (46.20 q ha-1) was recorded in maize crop grown in Vertisols.
With reference to water distribution as suggested by Minhas and Gupta water samples collected from different textural classes viz.,sandy clay loam, clay loam, sandy loam and clayey soils indicated that all the water samples were found to be safe with respect to EC, SAR and RSC values.
All the major (N, P and K), secondary (Ca, Mg and S) and micro (Fe, Mn, Zn, Cu and B) nutrients in index leaf samples of maize crop were positively and significantly correlated with their respective available nutrients in the soil.
In Alfisols, available N was positively and significantly correlated with silt content, bulk density and organic carbon while available S was positively and significantly correlated with pH and EC.
In Inceptisols, available N was negatively and significantly correlated with sand content whereas positively and significantly correlated with silt and organic carbon content. Further, available Mn was positively and significantly correlated with bulk density.
In Vertisols, available N was positively and significantly correlated with sand and organic carbon. Available Ca and Mn were positively and significantly correlated with clay content and pH whereas negatively and significantly correlated with sand content and EC. Further, available S was positively and significantly correlated with EC.
 
Date 2016-06-21T11:46:42Z
2016-06-21T11:46:42Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/67570
 
Language en
 
Relation D9369;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY