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Spatial Distribution of Fertility Status of Soils of Nagaland for their Management

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Title Spatial Distribution of Fertility Status of Soils of Nagaland for their Management
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Creator Bandyopadhyay, Siladitya, Reza, S.K., Padua, S., Dutta, D.P., Baruah, Utpal, Sah, K.D., Singh, S.K., Sarkar, D. and Ray S.K.
 
Subject Nutrient deficiency and sufficiency zone, spatial distribution map, soil acidity and soil fertility status
 
Description Not Available
Spatial distribution maps of important soil fertility parameters of Nagaland state were generated (on 1: 50,000 scale). It was observed that 83.6% of total geographical area (TGA) of the state comprised degraded acidic soils with pH < 5.5. Strong soil acidity developed as a result of rapid weathering of acidic parent materials under humid sub tropical climate especially in the districts of Longleng (97.0% area), Mokokchung (98.3% area), Mon (96.6% area), Wokha (98.3% area) and Zunheboto (91.0% area). Organic carbon is fairly high (> 1.00%) in more than 90% of TGA of the state as a result of dense and abundant forest vegetation. It was low in only 1.2% of TGA of the state, spread in few patches of Peren (3.6% area), Wokha (3.0% area) and Dimapur district (2.7% area). Among the available macronutrients, nitrogen (N) was low (< 280 kg ha-1) in only 11.1% of TGA and high (> 560 kg ha-1) in 23 .4% of TGA of the state, predominantly spread in the districts like Zunheboto (71.7% area), Kiphire (48.9% area) and Tuensang (40.7% area). The available phosphorus (P2O5) was low (< 34 kg ha-1) in 21.0% of TGA of the state. The phosphorus deficiency was major in Peren district (51.9% area) and also considerably significant in parts of Dimapur (36.7% area), Mon (29.4% area), Mokokchung (22.2% area) Kohima (22.0% area) and Phek district (20.5% area) due to its fixation in soil-exchange complex under strongly acidic reaction. Available potassium (K2O) was low (< 135 kg ha-1) in only 8.5% of TGA of the state. However, it was high (> 335 kg ha-1) in 51.2% of TGA of the state, predominantly spread in the districts of Kiphire (87.1% area), Zunheboto (81.8% area), Tuensang (69.7% area) and Kohima (58.5% area). Among the available micronutrients, zinc was deficient in 14.4% of TGA of the state, especially, in the districts of Dimapur (26.5% area), Mokokchung (19.9% area), Zunheboto (18.5% area), Mon (17.8% area) and Wokha (16.5% area). It was found that available phosphorus had significant correlation with pH (r = 0.53*) in Tuensang district, whereas, pH has significant correlation with organic carbon (r = -0.52*) in Wokha district. It was also noticed that organic carbon and available Zn was significantly correlated (r = 0.44*) in Phek district. Similarly, available phosphorus and Zn was significantly correlated (r = 0.43*) in Kohima district. The output of the study will be helpful in identifying the deficiency and sufficiency zoneof single and/ or multiple nutrients towards site specific nutrient management.
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Date 2020-06-30T14:00:36Z
2020-06-30T14:00:36Z
2015-08-07
 
Type Presentation
 
Identifier Bandyopadhyay, Siladitya, Reza, S.K., Padua, S., Dutta, D.P., Baruah, Utpal, Sah, K.D., Singh, S.K., Sarkar, D. and Ray S.K. (2015) Spatial Distribution of Fertility Status of Soils of Nagaland for their Management. Paper presented at the Nineteenth Annual Convention and National Conference on “Application of Clay Science in Agriculture, Environment and Industry”, Clay Minerals Society of India, New Delhi, 7-8 August, 2015, Kolkata, pp
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http://krishi.icar.gov.in/jspui/handle/123456789/37714
 
Language English
 
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Publisher Not Available