Study on the determination of nutrient status of NTRI tea gardens soils
2011
Sarwar, S. (PARC National Tea Research Inst., Mansehra (Pakistan)) | Ahmad, F. (PARC National Tea Research Inst., Mansehra (Pakistan)) | Waheed, A. (PARC National Tea Research Inst., Mansehra (Pakistan)) | Qamar-uz-Zaman
The study was conducted at National Tea Research Institute (NTRI), Shinkiari, District Mansehra, during year 2006-07 with the objective to find out nutrient status of NTRI tea garden soils to formulate and optimize use of fertilizer doses. Soil Samples were collected from mature tea garden, young tea garden and fallow land upto the depth of 45 cm with an interval of 15 cm, i.e., 0-15, 15-30 & 30-45 cm. The laboratory analysis of soil samples showed that the pH value of soil under mature tea garden was more acidic (5.1, 5.2 and 5.4) as compared to the soil under young tea garden (6.2, 6.4 & 6.2) and fallow land (6.3, 6.3 & 6.2) at the given three depths, respectively. The soil of mature tea garden showed maximum amount of organic matter (1.52, 1.21 and 1.18%) while it was lowest in fallow land (0.5, 0.53 and 0.66%, respectively). Total soluble salts ranged from 0.02 to 0.04% in all sites under the present investigation. Mature tea garden soils at depth of 0-15 cm showed highest N %age (0.1) while the lowest (0.025%) was recorded in fallow land at the depth of 30-45cm. Phosphorus was found in adequate amount in all the sites. It ranged from 13.60 mg per kg (fallow land) to 61.25 mg per kg (mature tea garden). Mature tea garden soils also recorded the highest amount of potassium concentration (300.52 mg per kg) compared to the soils of young tea garden and fallow land.
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