GROWTH, PRODUCTIVITY AND DISEASE INCIDENCE OF POTATO (Solanum tuberosum L.) AS INFLUENCED BY NITROGEN, POTASSIUM LEVELS AND MICRONUTRIENTS
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Date
2015-07-10
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A field experiment was conducted during Kharif 2014 at College of Agriculture,
Hassan, University of Agricultural Sciences, Bengaluru to study the effect of
different levels of nitrogen , potassium and micronutrients on growth, yield, quality,
nutrient uptake and economics of potato in red sandy loam soil. The experiment
was laid out in a Randomized Complete Block Design (RCBD) with three
replications and twelve treatment combinations . The investigation revealed that, 125
% recommended N and K + 0.5 % ZnSO4
* + 0.2 % Borax* @ 45 DAP recorded
significantly higher plant height (68 cm), number of shoots (4.2 plant-1), number of
leaves (88 plant-1), total dry matter production (65 g plant-1) and late blight incidence
and severity recorded (9 %) 75 DAP and tuber weight (279.5 g plant-1), number of tubers
(4.9 plant-1), tuber yield (23.3 t ha-1), protein content (13.9 %) and nutrient uptake
(104.7, 36.4 and 103.7 kg N, P2O5 and K2O ha-1) at harvest. However, it was on par with
75 % recommended N and K + 0.5 % ZnSO4
* + 0.2 % Borax* @ 45 DAP. Higher net
returns ( .156049 ha-1) and B:C ratio (3.4) was recorded in 75 % recommended N and K
+ 0.5 % ZnSO4
* + 0.2 % Borax* @ 45 DAP.
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