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International Journal of Applied Agricultural & Horticultural Sciences
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DOI Prefix : 10.37322
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Vol. 6 (4) : July-August 2015 issue
Green Farming Vol. 6 (4) : 764-767 ; July-August, 2015
Interaction effects of nitrogen and potassium on soil nutrient fractions, yield and nutrient uptake by okra
B. NAVEEN KUMAR1*, G. PADMAJA2, P. CHANDRASEKHAR RAO3
Department of Soil Science and Agricultural Chemistry, College of Agriculture, Acharya N.G. Ranga Agricultural University, Hyderabad - 500 030 (Andhra Pradesh)
Designation :  
1Ph.D. Scholar *(naveenb.agri999@gmail.com), 2Professor, 3Dean
Subject : Soil Science & Agric. Chemistry; Soil Health & Soil Conservation Engg.
Paper No. : P-2700
Total Pages : 4
Received : 28 September 2014
Revised accepted : 12 January 2015
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Citation :

B. NAVEEN KUMAR, G. PADMAJA and P. CHANDRASEKHAR RAO. 2015. Interaction effects of nitrogen and potassium on soil nutrient fractions, yield and nutrient uptake by okra. Green Farming Vol. 6 (4) : 764-767 ; July-August, 2015

ABSTRACT
A field experiment was conducted during kharif season of 2011 on a sandy loam soil (Alfisol) at Student's Farm, College of Agriculture, Rajendranagar, Hyderabad with a view to study the effect of levels of nitrogen (0, 60, 120 and 180 kg N ha-1) and potassium (0, 30, 60 and 90 kg K ha-1) on soil nutrient (N and K) fractions, pod yield and total nutrient uptake by okra. Randomized Block Design with factorial concept was followed. The pod yield of okra was significantly increased with nitrogen, potassium and their interactions. Among the different interactions (N×K), the highest pod yield (126.17 q ha-1) was recorded by combined application of nitrogen @ 180 kg ha-1 + potassium @ 90 kg ha-1 (N3K3) which was on par with nitrogen @ 180 kg ha-1 + potassium @ 60 kg K2O ha-1 (N3K2). Highest total N (83.83 kg ha-1) and K (75.19 kg ha-1) uptake was recorded with combined application of 180 kg N ha-1 + 90 kg K2O ha-1 (N3K3). Among the different forms of nitrogen and potassium, both NH4-N and NO3-N forms of nitrogen and readily available forms of potassium viz., water soluble K and exchangeable K contributed to pod yield and total N and K uptake, which was evidenced by their significant correlation with these plant parameters.
Key words :
Nitrogen fractions, Okra, Pod yield, Potassium fractions, Total nutrient uptake.