Effect of tillage, fertility levels and weed management on late sown wheat (Triticum aestivum L.)
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Date
2021-07-29
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ANDUAT, Kumarganj, Ayodhya
Abstract
A field experiment was conducted for two consecutive rabi seasons of 2018-19 and 2019-20 at the Agronomy Research Farm of the Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya (U.P.). The field experiment way laid out in
split plot design assigning two tillage practices viz., Conventional tillage (3 ploughing) and Zero tillage (ferti-cum-seed drill) alongwith three fertility levels viz., 100% RDF (120:60:40
NPK kg ha-1), 75 % RDF + 25% RDN- FYM (6 t ha-1) and 50% RDF + 50% RDN- FYM (12 t ha-1) in main plot. Each main plot was further divided into four sub plots to accommodate sub
plot treatments i.e. weed management practices comprising Weedy check, Weed free upto 60 DAS, Sulfosulfuron @ 30 g a.i. ha-1 (POE) and Sulfosulfuron @ 30 g a.i. ha-1 + Metsulfuron @ 4 g a.i. ha-1 (POE) - Ready mixture. Thus a total of 24 treatment combinations were tested in the study and were replicated thrice. The soil of the experimental field was silty loam in texture having slightly alkaline in reaction, low in organic carbon and available nitrogen, but medium in available phosphorus and potassium during experimentation. The total rainfall experienced
during the crop growth season was 65.5 mm in 2018-19 and 228.4 mm in 2019-20. K-7903
(halna) variety of wheat was used for sowing of the experiment. Tillage, fertility levels and
weed management were done as per treatment. Other crop management practices were followed as per the recommendation of the area.
Among the tillage practices, zero tillage had a significant influence on weeds, crop growth, yield attributes and yield along with nutrient uptake of wheat during both the years.
In case of fertility levels, application of 100% RDF (120:60:40 NPK kg ha-1) exerted significantly less weed density, weed dry matter, weed index and higher weed control
efficiency, crop growth, yield attributes and yield, nutrient content and their uptake along with
protein content during both the experimental years. Weed free upto 60 DAS recorded significantly less weed density, weed dry matter, weed index and higher weed control efficiency, crop growth, yield attributes and yield, nutrient
content and their uptake along with protein content during both the experimental years.
Economically, combined application of M2F1W2 (Zero tillage with application of 100% RDF (120:60:40 NPK kg ha-1) under weed free upto 60 DAS). However, higher net returns and
B: C ratio were obtained with combined application of M2F1W4 (Zero tillage with application
of 100% RDF (120:60:40 NPK kg ha-1) under post emergence application of Sulfosulfuron @ 30 g a.i. ha-1 + Metsulfuron @ 4 g a.i. ha-1 (POE)-Ready mixture) was proved superiority in
terms of net returns and B: C ratio of wheat over rest of the treatments during both the years.
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