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Subject: Soil Science × Author: Arya, Rajendra Prasad × End date: 2017 × Start date: 2015 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Status of some macro- and micro-nutrients in soils of Almora district of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-07) Arya, Rajendra Prasad; Pachauri, S.P.
    An investigation was carried out to study the available macro- and micro-nutrients (N, P, K, Ca, Mg, S, Zn, Cu, Fe, Mn, B and Mo) and some physico-chemical properties in surface (0-15 cm) soils of Almora district (Uttarakhand). In all, 291 soil samples were taken for the study. The content of available macro and micro-nutrients were also correlated with some soil properties. Soil texture of district varied from sandy loam to sandy clay loam, Soil pH (1: 2 soil water suspensions) ranged from 4.24 to 8.86, electrical conductivity ranged from 0.02 to 0.53 dSm-1 and organic carbon ranged from 2.63 to 28.37 g kg-1. In soils of the entire district available N ranged from (112.90 to 363.78 kg N ha-1), P (6.4 to 46.4 kg ha-1), K (53.8 to 571.2 kg ha-1), Ca (844 to 6244 mg kg-1), Mg (120 to 2640 mg kg-1), S (2.60 to 36.29 mg kg-1), Zn (0.10 to 20.70 mg kg-1), Cu (0.11 to 6.21 mg kg-1), Fe (1.93 to 127.02 mg kg-1), Mn (1.24 to 56.92 mg kg-1), B (0.12 to 1.11 mg kg-1) and Mo (0.02 to 0.36 mg kg-1). The relationships between soil properties and available macro and micro- nutrient revealed that in soilsof entire district, soil pH significantly and positively correlated with available P and Zn but significantly and negatively correlated with available Fe, Mn and B. Electrical conductivity (EC) significantly and positively correlated with available K, S and Ca but significantly and negatively correlated with available Mn. Organic carbon showed significant and positive correlation with available N, S, Ca, Zn, Fe and Cu but showed significant and negative correlation with available B. From this study, it may be concluded that soils of Almora district were having widely varying soil pH which ranged from very acidic to moderately alkaline in reaction, low to medium in salt concentration and high in organic carbon. Based on the calculated nutrient indices (N.I.), the soils of Almora were low in N and Mg, medium in B and high in rest other nutrients. Further, pot culture and field experiments need to be carried out in future to verify the deficiency of different nutrients besides verifying the validity of critical limits of important macro- and micro-nutrients.