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
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Creator |
SOMA SEKHAR BABU, S
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Contributor |
KEERTHI VENKAIAH
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Subject |
fungi, biological development, diseases, pathogens, planting, sowing, biochemical compounds, biological control, enzymes, application methods
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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 xiii 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. |
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Date |
2016-06-03T14:17:40Z
2016-06-03T14:17:40Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/66720
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Language |
en
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Relation |
D8978;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
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