STUDIES ON DATES OF SOWING AND NUTRIENT MANAGEMENT IN AJOWAN (Trachyspermum ammi L.) UNDER NORTHERN DRY ZONE OF KARNATAKA
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Date
2003
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, DHARWAD
Abstract
"A field experiment was conducted at Kittiir Raani Channnamma College
of Horticultiu^, Anabliavi, during Khaiif 2002 to know the possibility of
cultivation of ajowan under Northern Dry Zone of Kamataka, to find oiit tJie
suitable sowing time and optimum dose of NPK application on growth, seed
and essential oil yield. The two experiments were laid out in Randomized
Block Design with 8 treatments to each expeiiment. The date of sowing
experiment crop was sown from June second fortnight to Octobei
(at foitnight interval) and for nutrient management experiment the
different levels of NPK were appHed (50:25:25, 75:37.5:37.5, 100:50:50,
125:62.5:62.5, 150:75:75, 175:8.5:87.5, 200:100:100 kg ha-i) over control
(no fertilizer) in three repUcations. The results revealed that ajowan, a new
crop to this zone, could be grown successfully. Among the differcnt dates of
sowing June second foitnight resulted highest seed (11.53 q ha ^) and
essential oil yield (50 1 ha^) followed by October first fortnight sowing
(9.38 q ha ' and 43.90 1 h a ' , respectively) since plants were exposed to
longer period of growth with sufficient conserved moisture and favourable
temperature for growtli and yield attributing traits. But in September fiist
and second fortnight sown croj:) resulted low^er seed (4.75 and 5.86 q ha ',
respectively) and essential oil yield (17.53 and 23.83 1 ha ', respectively)
because plants were exposed to adverse climatic conditions like supra
optimal soil moisttire for prolonged period lead to wilting.
Among the different levels of NPK applied 125:62.5:62.5 kg ha ^
resulted in better growth, yield attiibuting tiaits, seed (9.07 q ha ') and
essential oil yield (39.57 i h a ' ) over control (2.43 q and 8.43 1 h a ',
respectively). Above and below tiiis level of fertilizer application resiilted in
poor perfoiTnance. Hence, for getting highei B : C ratio (3.90) application of
125:62.5:62.5 NPK kg h a ' was found to be optimum."
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