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PREFORMANCE OF RICE FALLOW MAIZE UNDER ZERO TILLAGE CONDITIONS

KrishiKosh

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Title PREFORMANCE OF RICE FALLOW MAIZE UNDER ZERO TILLAGE CONDITIONS
 
Creator ANNAPURNAMMA, P
 
Contributor PRATAP KUMAR REDDY, A
 
Subject PREFORMANCE, RICE, FALLOW, MAIZE, UNDER, ZERO, TILLAGE, CONDITIONS
 
Description An investigation on “Performance of rice fallow maize under zero tillage
conditions” was conduted during rabi 2006-’07 at Student’s Farm, College of
Agriculture, Rajendranagar, Hyderabad. The experiment was conducted on a sandy
loam soil of medium fertility with nine treatments including tillage practices, sowing
methods and weed control measures in randomized block design with three
replications.
Initial and final plant stand of maize was higher under zero tillage conditions
than in conventional planting. Random sowing with appropriate weed control
measures under zero tillage conditions recorded higher initial and final plant stand.
Plant height at different crop growth periods was higher and comparable in
conventional planting and integrated weed control treatment involving application of
paraquat and atrazine as pre and post-emergence followed by a hand weeding at 30
DAS in line sown zero till crop.
Number of green leaves plant-1 and LAI were higher at 60 DAS which
thereafter declined gradually towards maturity. Maximum number of leaves
plant-1and LAI were registered by conventional planting and line sown zero till
treatment applied with paraquat and atrazine followed by a hand weeding at 30
DAS. Dry matter accumulation of maize increased continuously upto maturity.
Consequent to taller plants, more number of leaves plant-1 and higher LAI, dry
matter production was comparatively higher in conventional planting and line sown
zero tillage treatment applied with two compatible herbicides as pre and postemergence
followed by a hand weeding at 30 DAS.
Absence of weed control in either random or line sowings under zero tillage
conditions has delayed silking by two days as compared to conventional planting
and zero tillage weed control treatments. Number of cobs plant-1 remained stable for
all the treatments. Cob weight was higher both in conventional planting and line
sown zero till treatment with integrated weed control. Shelling percentage ranged
from 65 to 73 in conventional planting and zero till line and random sowings applied
with two compatible herbicides either alone or with a follow-up hand weeding at 30
DAS. However, 100 grain weights did not show any variation among the treatments.
Favourable growth characters and yield attributes had resulted in higher grain
and stover yields in conventional planting and line sown zero till treatment involving
application of paraquat as pre-emergence and atrazine as post-emergence followed
by a hand weeding at 30 DAS. Harvest index values never reached more than 50
percent. However, random sowing under zero tillage conditions without any weed
control measures has recorded highest harvest index value of 41 percent.
Better control of weeds has resulted in lower weed dry weights in
conventional planting and also in zero tillage random and line sown treatments
involving application of paraquat and atrazine either alone or with a follow-up hand
weeding at 30 DAS. Line sowing with integrated weed control under zero tillage
conditions was found best with lowest weed index value. Application of paraquat as
pre-emergence and atrazine as post-emergence either alone or with a follow-up
herbicide at 30 DAS registered higher and similar weed control efficiencies than
application of paraquat alone under zero tillage conditions.
Gross returns from conventional planting method was highest. On the
otherhand, net returns and benefit-cost ratio were higher in line sown zero till
treatment applied with two compatible herbicides followed by a hand weeding at 30
DAS.
 
Date 2016-08-08T14:27:06Z
2016-08-08T14:27:06Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71550
 
Language en
 
Relation D8177;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD