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STUDIES ON SOIL AND PLANT NUTRIENT STATUS AND YIELD OF RICE UNDER FARMER’S FIELDS IN NELLORE DISTRICT OF ANDHRA PRADESH

KrishiKosh

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Title STUDIES ON SOIL AND PLANT NUTRIENT STATUS AND YIELD OF RICE UNDER FARMER’S FIELDS IN NELLORE DISTRICT OF ANDHRA PRADESH
 
Creator SOMA SEKHAR BABU, S
 
Contributor KEERTHI VENKAIAH
 
Subject fungi, biological development, diseases, pathogens, planting, sowing, biochemical compounds, biological control, enzymes, application methods
 
Description The present investigation was carried out to study the nutrients status
of rice grown soils and index leaf of rice crop grown in different villages of
various mandals in Nellore district, Andhra Pradesh. For this purpose, 60
fields were selected after the harvest of the rice crop and the soil samples
were collected from 0-30 cm depth. Index leaf samples were also collected
from the plants in the fields from where the soil samples were drawn. The
soil samples were analysed for their physical and physico-chemical
characteristics viz., soil texture, pH, EC, organic carbon, CEC and free
calcium carbonate and chemical characteristics viz., available N, P, K, Ca,
Mg, S, Fe, Mn, Zn, and Cu. Similarly, index leaf samples were also analysed
for their N, P, K, Ca, Mg, S, Fe, Mn, Zn and Cu.
The texture of the rice grown soils varied from sandy clay loam to
clay. The soils were neutral to strongly alkaline in reaction, non-saline and
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low to medium in organic carbon. The CEC values in rice grown soils were
low to medium. All the soils were non-calcareous in nature.
Regarding the nutrients status, the rice grown soils were low to
medium in available nitrogen and medium to high in available phosphorus
and potassium. All the rice grown soils were sufficient in available Ca, Mg
and S. Available Fe, Mn, Zn and Cu in rice grown soils were above their
respective critical limits while 1.66 per cent of the soils were deficient in
available Zn.
The index leaf nitrogen, phosphorus and potassium contents were
above their respective critical limits. The leaf N, P and K were positively
and significantly correlated with their respective soil nutrients. The index
leaf Ca, Mg and S contents were found to be sufficient in all samples. The
leaf Ca, Mg and S contents were positively and significantly correlated with
their respective soil nutrients.
The leaf Fe, Mn and Cu contents were found to be above their
respective critical limits. However, 13.33 per cent samples were deficient in
leaf Zn. The leaf Fe, Mn, Zn and Cu contents were positively and
significantly correlated with their respective soil nutrients.
The grain yield of rice crop under the investigation ranged from 1900
to 2500 kg acre-1 with a mean value of 2269 kg acre-1. The trend of
variations with respect to the rice yield among the different management
practices and within the same management practice was more or less
negligible. However, the grain yield of rice crop under study was
considerably to be high in the farmer’s field who applied farmyard manure
along with inorganic fertilizers as compared to inorganic fertilizers alone.
Simple correlation studies revealed that N, P, K, Ca and S were
positively and significantly correlated with organic carbon. Available K and
Cu were positively and significantly correlated with soil pH while available
P and Ca were negatively and significantly correlated with soil pH.
Available N, K and S were positively and significantly correlated with
CaCO3. However, available P was negatively and significantly correlated
with clay content.
 
Date 2016-06-03T14:17:40Z
2016-06-03T14:17:40Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66720
 
Language en
 
Relation D8978;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY