Effect of different tillage and weed management practices on wheat yield and soil properties
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Date
2017
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CCSHAU
Abstract
An ongoing field experiment established in 2012 at Agronomy Research Farm, CCS Haryana
Agricultural University, Hisar, India was selected to study “Effect of different tillage and weed
management practices on wheat yield and soil properties”. The experiment was laid out with three
different tillage (zero tillage, FIRBS and conventional tillage) and four weed management practices
(W1: Atrazine (50% W.P.) @ 750 g/ha in maize and pinoxaden 50g/ha + premix of metsulfuron and
carfentrazone (Ally Express 50% DF) 25g/ha + 0.2 % NIS as post-emergence in wheat, W2:
Tembotrione (Laudis 42% Sc @ 120 g/ha + S 1000ml/ha (10-15 DAS / 2-4 leaf stage) in maize and
clodinafop 60 g/ha + metsulfuron 4 g/ha as post- emergence in wheat, W3: Two HW in maize (20 to 40
DAS) and wheat (30 to 50 DAS), W4: Weedy check in maize and wheat) at two different depth (0-5 &
5-15 cm) were replicated thrice in spilt plot design. Plant and soil samples for analysis were collected
after 4 cycle of maize-wheat cropping system in the month of April, 2016 after the harvesting of wheat
crop.
A significant higher yield reported under FIRBS (66.1 qha-1) method of tillage as compared to
other tillage practices. pH and EC reported higher under conventional tillage under different tillage and
weed management practices. SOC (0.896%), N (100.57 kg ha-1), P (32.61 kg ha-1), S (18.21 kg ha-1),
HA-C (0.352%) and FA-C (0.239%) reported higher under zero tillage due to more retention of crop
residue on surface. However, a reverse trend was obtained in case of available K. Values of Zn, Fe and
Cu was also recorded higher under zero tillage while value of Mn reported higher under conventional
tillage. Most of the nutrients values reported higher at upper depth (0-5 cm) and under weedy check
treatment. DOC followed reverse trend as compared to other parameters and higher values reported
under conventional tillage. Highest values of MBC (336.02 mg kg-1) was noticed under zero tillage and
at 0-5 cm depth. All enzymes (Dehydrogenase, alkaline phosphatase and urease) activities reported
higher under ZT. Dehydrogenase and urease activity reported higher at upper depth (0-5cm) while
activity of alkaline was higher at lower depth (5-15 cm). At the end of season weed management
practices showed non-significant effect on MBC and all enzymes. Bulk density of soil reported higher
under CT as compared to other tillage practices.