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Author R.B Das |
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Refine your searchEffect of methods of crop establishment and weed management on Grain yield of rice and wheat in rice-wheat system / AK Gautam
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Title : Effect of methods of crop establishment and weed management on Grain yield of rice and wheat in rice-wheat system Material Type: printed text Authors: AK Gautam, Editor ; NP Adhikari, Author ; M Mishra, Author ; R.B Das, Author Publication Date: 2010 Pagination: 392-396 p. Abstract: Rice-wheat system is a labor intensive due to high cost in land preparation and plant establishment, and the productivity of this
system is either declining of stagnant. An alternative crop establishment method is needed for both the crops particularly in system
basis to reduce the cost of cultivation and to sustain the productivity. Therefore, an experiment was conducted to study the effect of
methods of crop establishments, rice varieties and weed management on productivity of rice and wheat in rice-wheat system during
2004/05 and 2005/06, respectively, at National Rice Research Program, Hardinath. Method of crop establishment was laid out in
main-plots and rice varieties and weed control methods were in sub-plots in split plot design. All the crop establishment combination
in rice-wheat system produced similar yield in the pattern. But dry weed weight at 25 days after transplanting (DAT) of rice and at
wheat maturity was significantly higher in bed planting combination of rice and wheat. Weed control methods did not differ in grain
yield of rice but wheat yield was significantly higher (2,532 kg/ha) due to use of Isoproturan + 2, 4-D both @ 1.5 kg a. i.lha than no
weeding (2,142 kg/ha). Weed dry weight in rice was significantly lower at 25 days after transplanting of rice due to Butachlor spray
+Hand weeding (HW) at 25 DAT than HW at 25 and 45 DAT. Similarly, use ofherbicides reduced weed weight in wheat compared
to no weeding.Link for e-copy: http://elibrary.narc.gov.np/?r=1042 Effect of methods of crop establishment and weed management on Grain yield of rice and wheat in rice-wheat system [printed text] / AK Gautam, Editor ; NP Adhikari, Author ; M Mishra, Author ; R.B Das, Author . - 2010 . - 392-396 p.
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Abstract: Rice-wheat system is a labor intensive due to high cost in land preparation and plant establishment, and the productivity of this
system is either declining of stagnant. An alternative crop establishment method is needed for both the crops particularly in system
basis to reduce the cost of cultivation and to sustain the productivity. Therefore, an experiment was conducted to study the effect of
methods of crop establishments, rice varieties and weed management on productivity of rice and wheat in rice-wheat system during
2004/05 and 2005/06, respectively, at National Rice Research Program, Hardinath. Method of crop establishment was laid out in
main-plots and rice varieties and weed control methods were in sub-plots in split plot design. All the crop establishment combination
in rice-wheat system produced similar yield in the pattern. But dry weed weight at 25 days after transplanting (DAT) of rice and at
wheat maturity was significantly higher in bed planting combination of rice and wheat. Weed control methods did not differ in grain
yield of rice but wheat yield was significantly higher (2,532 kg/ha) due to use of Isoproturan + 2, 4-D both @ 1.5 kg a. i.lha than no
weeding (2,142 kg/ha). Weed dry weight in rice was significantly lower at 25 days after transplanting of rice due to Butachlor spray
+Hand weeding (HW) at 25 DAT than HW at 25 and 45 DAT. Similarly, use ofherbicides reduced weed weight in wheat compared
to no weeding.Link for e-copy: http://elibrary.narc.gov.np/?r=1042 E-copies
http://nkcs.org.np/narc/dl/?r=1042URL
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Title : Effect of seedling age and spacing on productivity of irrigated rice under system of rice intesificaiton in central terai Material Type: printed text Authors: AK Gautam, Editor ; NP Adhikari, Author ; M Mishra, Author ; R.B Das, Author Publication Date: 2010 Pagination: 397-401 p. Abstract: System of rice intensification (SRI), practically considered as an agrological approach rather than a technology, has received a fair
amount of attention in recent year in most of the rice growing countries. Transplanting of younger seedlings in wider spacing is the
practice to be followed in SRI. But the literature indicated different age of seedlings and various plant spacing for this system of rice
cultivation. Therefore, an experiment was conducted in split plot design with plant spacing in square pattern (20x20, 25x25, 30x30
and 40x40 em) as main-plots and age of seedlings (10,15 and 20 days) as sub-plots with three replications in 2004 and 2005 with
some modifications in other practices. The statistical analysis revealed that days to heading, days to maturity, number of tillers/hill at
30 OAT, per cent of filled grains/panicle and 1000 grain weight were not affected by the spacing. But, panicles/hill at maturity was
significantly higher under wider spacing of 40x40 em (18.2) than other spacing but panicles/unit area was remarkably lowest (114).
Younger seedlings of 10 days old matured earlier and produced significantly higher number of panicles/m2 (186) with lower filled
grains/panicle than older seedlings. The interactive effect of decreasing number of panicle number/m2 and filled grains/panicle from
closer to wider spacing and younger to older seedlings resulted in non-significant differences in grain yield during both years of
study. The overall result suggested that rice seedling from 10 to 20 days old can be transplanted in square pattern of20, 25, 30 and
40 em spacing.Link for e-copy: http://elibrary.narc.gov.np/?r=1043 Effect of seedling age and spacing on productivity of irrigated rice under system of rice intesificaiton in central terai [printed text] / AK Gautam, Editor ; NP Adhikari, Author ; M Mishra, Author ; R.B Das, Author . - 2010 . - 397-401 p.
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Abstract: System of rice intensification (SRI), practically considered as an agrological approach rather than a technology, has received a fair
amount of attention in recent year in most of the rice growing countries. Transplanting of younger seedlings in wider spacing is the
practice to be followed in SRI. But the literature indicated different age of seedlings and various plant spacing for this system of rice
cultivation. Therefore, an experiment was conducted in split plot design with plant spacing in square pattern (20x20, 25x25, 30x30
and 40x40 em) as main-plots and age of seedlings (10,15 and 20 days) as sub-plots with three replications in 2004 and 2005 with
some modifications in other practices. The statistical analysis revealed that days to heading, days to maturity, number of tillers/hill at
30 OAT, per cent of filled grains/panicle and 1000 grain weight were not affected by the spacing. But, panicles/hill at maturity was
significantly higher under wider spacing of 40x40 em (18.2) than other spacing but panicles/unit area was remarkably lowest (114).
Younger seedlings of 10 days old matured earlier and produced significantly higher number of panicles/m2 (186) with lower filled
grains/panicle than older seedlings. The interactive effect of decreasing number of panicle number/m2 and filled grains/panicle from
closer to wider spacing and younger to older seedlings resulted in non-significant differences in grain yield during both years of
study. The overall result suggested that rice seedling from 10 to 20 days old can be transplanted in square pattern of20, 25, 30 and
40 em spacing.Link for e-copy: http://elibrary.narc.gov.np/?r=1043 E-copies
http://nkcs.org.np/narc/dl/?r=1043URL
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Title : Outreach research report of NRRP, Hardinath Material Type: printed text Authors: Thakur, P. ; NP Adhikari, Author ; E.M. Bhattarai, Author ; Yadaw, R.B., Author ; M Yadav, Author ; R.K Joshi, Author ; R.B Das, Author Pagination: 376-381 p. Languages : English (eng) Abstract: Outreach research activities in various crops (Rice, wheat and potato) were conducted at
Raghunathpur, Dhanusha and Ekarahiya, Mahottari during 2002 and 2003. The result
differed agro-ecologically in difforent sites in different years. Out of six rice genotypes tested
in normal season. highest mean grain yield (4.9 tlha) was produced by BPI 3-2, BR 4684-13-
1-1-6-3 (4.7 t/ha) and IR 52115-103-3-1-1 (4.5 t/ha). Significant higher grain yield was
obtained in BR 425-189-1-1-2-1 (3. 7 t/ha) and B 6149F -MR-7 (3.6 tlha) in rainfed lowland
areas. Among fine and aromatic rice, all tested lines except GAN-WAN-XIAN-22 recorded
significantly higher grain yield than the local check variety. None of the tested genotypes in
wheat CFFT were superior to check variety ( Bhrilcuti ) at Raghunathpur but in case of
Ekarahiya, all tested wheat genotypes except BL1968 were performed equally well. Likewise,
highest grain yield of 2. 4 t/ha was obtained in Bhrilcuti that was at par with BL 2047 (2.27
t/ha ).Butachlor was noticed effective in controlling of weed in rice. But in case of wheat,
maximum grain yield of 3.5 tlha was obtained with the use of Isoproturan applied@ 1.5
Kg/ha. In FFT on potato, the highest mean tuber yield of 25.5 t/ha was recorded in TPS 67
that was statistically at par with NSf (23.8 tlha) and C 40 (21.5 t/ha).Link for e-copy: http://elibrary.narc.gov.np/?r=1125 Outreach research report of NRRP, Hardinath [printed text] / Thakur, P. ; NP Adhikari, Author ; E.M. Bhattarai, Author ; Yadaw, R.B., Author ; M Yadav, Author ; R.K Joshi, Author ; R.B Das, Author . - [s.d.] . - 376-381 p.
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Languages : English (eng)
Abstract: Outreach research activities in various crops (Rice, wheat and potato) were conducted at
Raghunathpur, Dhanusha and Ekarahiya, Mahottari during 2002 and 2003. The result
differed agro-ecologically in difforent sites in different years. Out of six rice genotypes tested
in normal season. highest mean grain yield (4.9 tlha) was produced by BPI 3-2, BR 4684-13-
1-1-6-3 (4.7 t/ha) and IR 52115-103-3-1-1 (4.5 t/ha). Significant higher grain yield was
obtained in BR 425-189-1-1-2-1 (3. 7 t/ha) and B 6149F -MR-7 (3.6 tlha) in rainfed lowland
areas. Among fine and aromatic rice, all tested lines except GAN-WAN-XIAN-22 recorded
significantly higher grain yield than the local check variety. None of the tested genotypes in
wheat CFFT were superior to check variety ( Bhrilcuti ) at Raghunathpur but in case of
Ekarahiya, all tested wheat genotypes except BL1968 were performed equally well. Likewise,
highest grain yield of 2. 4 t/ha was obtained in Bhrilcuti that was at par with BL 2047 (2.27
t/ha ).Butachlor was noticed effective in controlling of weed in rice. But in case of wheat,
maximum grain yield of 3.5 tlha was obtained with the use of Isoproturan applied@ 1.5
Kg/ha. In FFT on potato, the highest mean tuber yield of 25.5 t/ha was recorded in TPS 67
that was statistically at par with NSf (23.8 tlha) and C 40 (21.5 t/ha).Link for e-copy: http://elibrary.narc.gov.np/?r=1125 E-copies
http://nkcs.org.np/narc/dl/?r=1125URL
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Title : Response of rice to seedling age and nitrogen Material Type: printed text Authors: NP Adhikari ; Gautam, A.K., Author ; G Pradhan, Author ; E.M. Bhattarai, Author ; R.B Das, Author Pagination: 215-216 p. Languages : English (eng) Abstract: A field experiment was conducted during 2001/02 and 2002/03 to study the response
of three rice varieties to seedling age under various N levels. Treatments were three
seedling age: 45, 55, and 65 days: three N levels that is 30, 60, and 90 kg N/ha.
Grain yield decreased with increase in seedling age from 45 days to 65 days at all N
levels for all the varieties. Rampur Masuli and NR601-1-1-9 performed better than
Hardinath 1 when 55 and 65-day-old seedlings were transplanted at all N levels.Link for e-copy: http://elibrary.narc.gov.np/?r=1105 Response of rice to seedling age and nitrogen [printed text] / NP Adhikari ; Gautam, A.K., Author ; G Pradhan, Author ; E.M. Bhattarai, Author ; R.B Das, Author . - [s.d.] . - 215-216 p.
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Languages : English (eng)
Abstract: A field experiment was conducted during 2001/02 and 2002/03 to study the response
of three rice varieties to seedling age under various N levels. Treatments were three
seedling age: 45, 55, and 65 days: three N levels that is 30, 60, and 90 kg N/ha.
Grain yield decreased with increase in seedling age from 45 days to 65 days at all N
levels for all the varieties. Rampur Masuli and NR601-1-1-9 performed better than
Hardinath 1 when 55 and 65-day-old seedlings were transplanted at all N levels.Link for e-copy: http://elibrary.narc.gov.np/?r=1105 E-copies
http://nkcs.org.np/narc/dl/?r=1105URL
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Title : Study on nursery management and nitrogen applicaiton in boro rice Material Type: printed text Authors: AK Gautam, Editor ; NP Adhikari, Author ; R.B Yadav, Author ; R.B Das, Author Publication Date: 2010 Pagination: 384-391 p. Abstract: Boro rice cultivation is an emerging rice culture in some parts of Nepal. Nursery raising is one of the major problems in Boro rice
culture. Rice seedling remains for long period in the nursery during winter season, which causes cold injury and breakage of seedling
during up-rooting. Crop period being longer in the main field may require higher dose of inorganic nitrogen during different growth
period. Therefore, three experiments were conducted with the objectives to study the effect of different materials on seedling growth
and t~e effect of plant stand and nitrogen levels on growth and yield of 1ice with different designs during 2004 and 2005 at NRRP,
Hardmath. The study revealed that use of either chopped wheat straw, chopped rice straw or compost significantly increased the
seedling height and weight at various days after seeding. Plant spacing had not any effect of filled grains/panicles, 1000 grain
weight, grain yield and harvest index. But biomass per unit area was significantly more (936 kglm2) under closer spacing (20 x 10
em) of transplant with lower panicleslm2 (6.9). Increasing levels of nitrogen significantly increased biomass/m2, filled grains/panicle,
1000 seed weight and grain yield up to 120 kglha. Beyond this level of nitrogen all these characters were art par. Harvest index did
not differ due to application increasing level of nitrogen. The study also revealed that more the number of split application of
nitrogen higher the panicle/hill, biomass/m2
, filled grains/panicle, 1000 grain weight and grain yield. Nitrogen applied as 25% basal
+ 25% at 30 or 40 DA T + 25% at 40 or 50 DAT + 25% at 50 or 60 DAT significantly produced higher grain yield of 4,241 and
4,322 kglha, respectively, than other treatments. As the studies were done only for one year, there experiments should be continued
for few more years to confirm the results and to make the recommendation.Link for e-copy: http://elibrary.narc.gov.np/?r=1041 Study on nursery management and nitrogen applicaiton in boro rice [printed text] / AK Gautam, Editor ; NP Adhikari, Author ; R.B Yadav, Author ; R.B Das, Author . - 2010 . - 384-391 p.
in Summer crops research in Nepal: Proceedings of the 25th Summer Crops Workshop held at Kathmandu 21-23 June 2007 / Adhikari, N.P.
Abstract: Boro rice cultivation is an emerging rice culture in some parts of Nepal. Nursery raising is one of the major problems in Boro rice
culture. Rice seedling remains for long period in the nursery during winter season, which causes cold injury and breakage of seedling
during up-rooting. Crop period being longer in the main field may require higher dose of inorganic nitrogen during different growth
period. Therefore, three experiments were conducted with the objectives to study the effect of different materials on seedling growth
and t~e effect of plant stand and nitrogen levels on growth and yield of 1ice with different designs during 2004 and 2005 at NRRP,
Hardmath. The study revealed that use of either chopped wheat straw, chopped rice straw or compost significantly increased the
seedling height and weight at various days after seeding. Plant spacing had not any effect of filled grains/panicles, 1000 grain
weight, grain yield and harvest index. But biomass per unit area was significantly more (936 kglm2) under closer spacing (20 x 10
em) of transplant with lower panicleslm2 (6.9). Increasing levels of nitrogen significantly increased biomass/m2, filled grains/panicle,
1000 seed weight and grain yield up to 120 kglha. Beyond this level of nitrogen all these characters were art par. Harvest index did
not differ due to application increasing level of nitrogen. The study also revealed that more the number of split application of
nitrogen higher the panicle/hill, biomass/m2
, filled grains/panicle, 1000 grain weight and grain yield. Nitrogen applied as 25% basal
+ 25% at 30 or 40 DA T + 25% at 40 or 50 DAT + 25% at 50 or 60 DAT significantly produced higher grain yield of 4,241 and
4,322 kglha, respectively, than other treatments. As the studies were done only for one year, there experiments should be continued
for few more years to confirm the results and to make the recommendation.Link for e-copy: http://elibrary.narc.gov.np/?r=1041 E-copies
http://nkcs.org.np/narc/dl/?r=1041URL
