Indian Journal of Agricultural Research
Year : 2007, Volume : 41, Issue : 4
First page : ( 235) Last page : ( 241)
Print ISSN : 0367-8245.

integrated use of concentrated organic manures, bio-fertilizers and inorganic npk on yield, quality and nutrient content of khasi mandarin (Citrus reticulata blanco.)

Medhi B.K., Saikia A.J., Bora S.C., Hazarika T.K., Barbora A.C.

Citrus Research Station, Assam Agricultural University Gelapukhuri Road, Tinsukia-786 125, India.

Abstract

An on-farm experiment was undertaken on twelve years old Khasi Mandarin plant in two orchards of Tinsukia and one orchard of Dibrugarh district, Assam during 2002 to 2004 with five different treatment combinations. Highest soil pH, available P₂O₅, leaf P and K were observed in the treatment receiving Mustard Oil Cake (MOC) (10kg/plant), bio-fertilizers (Azotobacter and PSB) and K₂O (600 g/plant) with no inorganic N. Available nutrient balance over the initial content showed maximum mining of nitrogen while positive balance was noticed in case of P₂O₅ (initial year)and K₂O all throughout the years of experimentation. Significantly highest soil Organic carbon (Organic Carbon), available Nitrogen, fruit quality (Juice, Total Soluble Solid, Total sugar, Ascorbic acid) and yield with highest economic return (5.75) were observed where half of the recommended dose of inorganic N and P₂O₅ were supplemented through Azotobacter and PSB along with K₂O (600 g/plant) and Mustard Oil Cake (7.5 kg/plant).

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