4 result(s) search for keyword(s) 'N'    

Review of agronomical research in rice / Bhurer, K.P.    

Public ISBD in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.     Title : Review of agronomical research in rice Material Type: printed text Authors: Bhurer, K.P. ; NP Adhikari, Author Pagination: 228-242 p. Languages : English (eng) Keywords: Rice  ;  Date  of  seeding  seedling  age  retransplanting  herbicides  spacing  and  N  levels Abstract: Rice varieties Chaite-4 and Local Basmati performed better by producing yield 1994 aiJd /295 kglha (1996) and 2290 and 2359 kglha (1997) transplanted on Bhadra 15'h {Sept. 3nJ and Aug. 3 r') respectively under rainfed lowland condition. Seeding age upto 60 days for Chaite {spring) season and 50 days for Bhadaiya season could be used for Chaite-2, Chaite-4, Chaite-6 and Radha-32, Radha-12. Radha-11 and Radha-7 did not differ due to age of seedling i.e. 20-60 days at Tarahara. Similarly difference upto 65 days did not hove significant on yield of genotypes Radha-11, RP /070 and RD-21 at Parwanipur. Ear(v and medium maturity varieties produced maximum yield March 15'h to April 15'1 ' seeding. Late maturity varieties produced the highest grain yield of May 15'h and 30'1 ' seeding respective(v. Radha-7 and Makwanpur-1 could be retransplanted instead of old seedlings. In varieties Masu/i, Radha-9 and Local Basmati, use of older seedling can substitute re-transplanting. Spacing of 20cm x 1 5cm. and 20cm. x 20cm. was suitable for ear(v and medium/late maturing rice varieties respectively. Rice transplanted either one or more than two seedlings had no effect on grain yields. For optimum yield balance dose of fertilizer and Zinc @25 kglha should be used At 90 kglha of nitrogen application, TOX 4004-36- 2-3-3-3, NR1487, NR601-l-l-9 yielded 4680, 4471 and -1470 kglha respective(v. Ghaiya 2 and Radha 32 gove yield 4160 and 4075 kg/ha at 90 kg Nlha where as Radha-4 at 30 and 60 kg N/ha. Maximum grain yield 6234.50 kg/ha was obtained from constant saturation (1 .0 em depth) through out the growing with the total supplied water of 1293.88 mm. The herbicides Oxadiazon :p. -1 Uha, Thiobencarb @ 5 Uha. Butachlor @ 3 Uha and Dinitranibe were found to be pronusmg for upland rice and Pendimethalin, Piperophos/2. 4-D, Butachlor, Pretilachlor/F enchlorim jor transplanted rice. Link for e-copy: http://elibrary.narc.gov.np/?r=1108 in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.     Review of agronomical research in rice [printed text] / Bhurer, K.P. ; NP Adhikari, Author . - [s.d.] . - 228-242 p. Languages : English (eng) Keywords: Rice  ;  Date  of  seeding  seedling  age  retransplanting  herbicides  spacing  and  N  levels Abstract: Rice varieties Chaite-4 and Local Basmati performed better by producing yield 1994 aiJd /295 kglha (1996) and 2290 and 2359 kglha (1997) transplanted on Bhadra 15'h {Sept. 3nJ and Aug. 3 r') respectively under rainfed lowland condition. Seeding age upto 60 days for Chaite {spring) season and 50 days for Bhadaiya season could be used for Chaite-2, Chaite-4, Chaite-6 and Radha-32, Radha-12. Radha-11 and Radha-7 did not differ due to age of seedling i.e. 20-60 days at Tarahara. Similarly difference upto 65 days did not hove significant on yield of genotypes Radha-11, RP /070 and RD-21 at Parwanipur. Ear(v and medium maturity varieties produced maximum yield March 15'h to April 15'1 ' seeding. Late maturity varieties produced the highest grain yield of May 15'h and 30'1 ' seeding respective(v. Radha-7 and Makwanpur-1 could be retransplanted instead of old seedlings. In varieties Masu/i, Radha-9 and Local Basmati, use of older seedling can substitute re-transplanting. Spacing of 20cm x 1 5cm. and 20cm. x 20cm. was suitable for ear(v and medium/late maturing rice varieties respectively. Rice transplanted either one or more than two seedlings had no effect on grain yields. For optimum yield balance dose of fertilizer and Zinc @25 kglha should be used At 90 kglha of nitrogen application, TOX 4004-36- 2-3-3-3, NR1487, NR601-l-l-9 yielded 4680, 4471 and -1470 kglha respective(v. Ghaiya 2 and Radha 32 gove yield 4160 and 4075 kg/ha at 90 kg Nlha where as Radha-4 at 30 and 60 kg N/ha. Maximum grain yield 6234.50 kg/ha was obtained from constant saturation (1 .0 em depth) through out the growing with the total supplied water of 1293.88 mm. The herbicides Oxadiazon :p. -1 Uha, Thiobencarb @ 5 Uha. Butachlor @ 3 Uha and Dinitranibe were found to be pronusmg for upland rice and Pendimethalin, Piperophos/2. 4-D, Butachlor, Pretilachlor/F enchlorim jor transplanted rice. Link for e-copy: http://elibrary.narc.gov.np/?r=1108

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Use of optical sensor for in-season nitrogen management and grain yield prediction in maize / B.R. Baral    

Public ISBD in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki     Title : Use of optical sensor for in-season nitrogen management and grain yield prediction in maize Material Type: printed text Authors: B.R. Baral, Author ; Adhikari, P, Author Pagination: 79-86 p. Languages : English (eng) Keywords: GDD  grain  N  demand  INSEY  NDVI,  response  index Abstract: Precision agriculture technologies have developed optical sensors which can determine plant’s normalized difference vegetation index (NDVI).To evaluate the relationship between maize grain yield and early season NDVI readings, an experiment was conducted at farm land of National Maize Research Program, Rampur, Chitwan during winter season of 2012. Eight different levels of N 0, 30, 60, 90, 120, 150, 180 and 210 N kg ha-1 were applied for hybrid maize RML 32 X RML 17 to study grain yield response and NDVI measurement. Periodic NDVI was measured at 10 days interval from 55 days after sowing (DAS) to 115 DAS by using Green seeker hand held crop sensor…………….. Link for e-copy: http://elibrary.narc.gov.np/?r=1785 in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki     Use of optical sensor for in-season nitrogen management and grain yield prediction in maize [printed text] / B.R. Baral, Author ; Adhikari, P, Author . - [s.d.] . - 79-86 p. Languages : English (eng) Keywords: GDD  grain  N  demand  INSEY  NDVI,  response  index Abstract: Precision agriculture technologies have developed optical sensors which can determine plant’s normalized difference vegetation index (NDVI).To evaluate the relationship between maize grain yield and early season NDVI readings, an experiment was conducted at farm land of National Maize Research Program, Rampur, Chitwan during winter season of 2012. Eight different levels of N 0, 30, 60, 90, 120, 150, 180 and 210 N kg ha-1 were applied for hybrid maize RML 32 X RML 17 to study grain yield response and NDVI measurement. Periodic NDVI was measured at 10 days interval from 55 days after sowing (DAS) to 115 DAS by using Green seeker hand held crop sensor…………….. Link for e-copy: http://elibrary.narc.gov.np/?r=1785

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On-farm and on-station evaluation of system of rice intesification (SRI) for increased production of rice / J. Tripathi  

Public ISBD in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.     Title : On-farm and on-station evaluation of system of rice intesification (SRI) for increased production of rice Material Type: printed text Authors: J. Tripathi ; Bhatta, M.R., Author ; S Justise, Author ; R.B Neupane, Author ; N.K Shakya, Author ; B.R Ghimire, Author ; T.B Chhetri, Author Pagination: 243-252 p. Languages : English (eng) Keywords: Rice  ;  Date  of  seeding  seedling  age  retransplanting  herbicides  spacing  and  N  levels Abstract: System of Rice Intensification (SRI) is a technique of agronomic manipulation to improve physiological activities of rice plant for increased rice yield SRI involves transplanting of young and single seedling in comparatively wider spacing with provided irrigation, weed and nutrient management practices. The results of different SRI experiments conducted in 2001102, 2002103 and in 2003/04 indicated tremendous scope to increase rice yield if SRI practices adopted properly. Three years results suggested that comparatively longer duration varieties with closer spacing (20X20 to 30X30cm) did better under SRI techniques when provided weeds were controlled effectively. Three rotary weeding followed by hand weeding found effective to control weeds. Experimental results suggested that ten days old seedlings can be transplanted either single or double seedlings/hill. No significant differences in time gap between uprooting to transplanting suggested that transplanting within 15 minutes from uprooting is not so necessary if seedlings could be protected (both root & shoot) form drying effects. Weeds were noticed as major problem in SRI particularly with wider spacing as compared to farmers practice. However, water management is another issue need to be shorted out as frequent drying and wetting had little deleterious effect on grain yield and also increased the cost of irrigation. · Link for e-copy: http://elibrary.narc.gov.np/?r=1109 in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.     On-farm and on-station evaluation of system of rice intesification (SRI) for increased production of rice [printed text] / J. Tripathi ; Bhatta, M.R., Author ; S Justise, Author ; R.B Neupane, Author ; N.K Shakya, Author ; B.R Ghimire, Author ; T.B Chhetri, Author . - [s.d.] . - 243-252 p. Languages : English (eng) Keywords: Rice  ;  Date  of  seeding  seedling  age  retransplanting  herbicides  spacing  and  N  levels Abstract: System of Rice Intensification (SRI) is a technique of agronomic manipulation to improve physiological activities of rice plant for increased rice yield SRI involves transplanting of young and single seedling in comparatively wider spacing with provided irrigation, weed and nutrient management practices. The results of different SRI experiments conducted in 2001102, 2002103 and in 2003/04 indicated tremendous scope to increase rice yield if SRI practices adopted properly. Three years results suggested that comparatively longer duration varieties with closer spacing (20X20 to 30X30cm) did better under SRI techniques when provided weeds were controlled effectively. Three rotary weeding followed by hand weeding found effective to control weeds. Experimental results suggested that ten days old seedlings can be transplanted either single or double seedlings/hill. No significant differences in time gap between uprooting to transplanting suggested that transplanting within 15 minutes from uprooting is not so necessary if seedlings could be protected (both root & shoot) form drying effects. Weeds were noticed as major problem in SRI particularly with wider spacing as compared to farmers practice. However, water management is another issue need to be shorted out as frequent drying and wetting had little deleterious effect on grain yield and also increased the cost of irrigation. · Link for e-copy: http://elibrary.narc.gov.np/?r=1109

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PERFORMANCE OF SPRING WHEAT VARIETIES AT DIFFERENT NITROGEN FERTILITY LEVELS IN RAINFED LOWLAND ECOSYSTEM OF NEPAL / B. P. TRIPATHl in Nepal Agriculture Research Journal, Vol.2, No.1 (1998)  

Public ISBD [article]  inNepal Agriculture Research Journal > Vol.2, No.1 (1998) . - 75-82 p. Title : PERFORMANCE OF SPRING WHEAT VARIETIES AT DIFFERENT NITROGEN FERTILITY LEVELS IN RAINFED LOWLAND ECOSYSTEM OF NEPAL Material Type: printed text Authors: B. P. TRIPATHl, Author Publication Date: 1998 Article on page: 75-82 p. Languages : English (eng) Keywords: Environmental  conditions,  N  rates,  Rainfed  lowland,  Wheat  varieties Link for e-copy: http://elibrary.narc.gov.np/?r=1174 [article] PERFORMANCE OF SPRING WHEAT VARIETIES AT DIFFERENT NITROGEN FERTILITY LEVELS IN RAINFED LOWLAND ECOSYSTEM OF NEPAL [printed text] / B. P. TRIPATHl, Author . - 1998 . - 75-82 p. Languages : English (eng) in Nepal Agriculture Research Journal > Vol.2, No.1 (1998) . - 75-82 p. Keywords: Environmental  conditions,  N  rates,  Rainfed  lowland,  Wheat  varieties Link for e-copy: http://elibrary.narc.gov.np/?r=1174