Normal sown irrigated wheat is one of the most important product ion environments in the Terai. Wheat varieties with high yield potential and resistant to major diseases are essential to increase production and productivity in such environment. Altogether 21 and 22 different breeding trials were conducted at N WRP, Bhairahawa during 2000/0 I and 2001/02 wheat seasons respectively to develop and identify suitable varieties for timely-sown irrigated conditions. Multilocational screening of different nurseries and yield trials were attempted at several locations…………………

Normal sown irrigated wheat is one of the most important product ion environments in the Terai. Wheat varieties with high yield potential and resistant to major diseases are essential to increase production and productivity in such environment. Altogether 21 and 22 different breeding trials were conducted at N WRP, Bhairahawa during 2000/0 I and 2001/02 wheat seasons respectively to develop and identify suitable varieties for timely-sown irrigated conditions. Multilocational screening of different nurseries and yield trials were attempted at several locations…………………

Late sown irrigated wheat i n Terai, tars and lower valley is normally due to the delay in rice harvesting because of the late maturing rice varieties, shortage of labors during the rice harvesting time (long turnover time) and excessive soil moisture that delays land preparation for wheat planting. Late heat stress on wheat is due to the high temperatures, westerly hot winds and it adversely affects the grain filling, grain size and quality and thus reduces the grain yield……………………………

Late sown irrigated wheat i n Terai, tars and lower valley is normally due to the delay in rice harvesting because of the late maturing rice varieties, shortage of labors during the rice harvesting time (long turnover time) and excessive soil moisture that delays land preparation for wheat planting. Late heat stress on wheat is due to the high temperatures, westerly hot winds and it adversely affects the grain filling, grain size and quality and thus reduces the grain yield……………………………

This project included 9 activities in the year 2000/2001. Those activities were 16th Nepal Rainfed Nursery (NRN), 18th Semi Arid Wheat Screening Nursery (SAWSN ). 31st International Triticale Screening Nursery (ITSN), F3 M E4SA, F5ME4SA.  18th Semi Arid Wheat Yield Trial (SAWYT), Advanced   Varietal Trial (AVT).  Initial Evaluation Trial (IET), and Coordinated Varietal Trial (CVT). The NRN and IET were sown in 3 locations……………………………..

This project included 9 activities in the year 2000/2001. Those activities were 16th Nepal Rainfed Nursery (NRN), 18th Semi Arid Wheat Screening Nursery (SAWSN ). 31st International Triticale Screening Nursery (ITSN), F3 M E4SA, F5ME4SA.  18th Semi Arid Wheat Yield Trial (SAWYT), Advanced   Varietal Trial (AVT).  Initial Evaluation Trial (IET), and Coordinated Varietal Trial (CVT). The NRN and IET were sown in 3 locations……………………………..

Coordinated Farmer's Field  Trial  for Terai, Tar and  Lower valleys(C FFT-TTL) was composed  of the wheat genotypes BL 1724, BL 1905, NL 867, NL 781 and Bhrikuti the check in the year 2000- 2001. Bhrikuti yielded the highest (4327 kg/ha.) followed by BL 1724 (4169  kg/ha .),  N L  867 (4045 kg/ha.), BL 1905 (3978 kg/ha.) and NL 781 (3954 kg/ha.)…………………

Coordinated Farmer's Field  Trial  for Terai, Tar and  Lower valleys(C FFT-TTL) was composed  of the wheat genotypes BL 1724, BL 1905, NL 867, NL 781 and Bhrikuti the check in the year 2000- 2001. Bhrikuti yielded the highest (4327 kg/ha.) followed by BL 1724 (4169  kg/ha .),  N L  867 (4045 kg/ha.), BL 1905 (3978 kg/ha.) and NL 781 (3954 kg/ha.)…………………

Under  this  project,  six  varietal improvement  activities were carried out at different Hill Agriculture Research Stations during 2000/2001 and 2001/2002, wheat season. Hybridization and plantation of generation lines were done at NWRP. Bhairahawa and DOAB, Khumaltar on both the years. 25th  and  26th Nepal…………………

Under  this  project,  six  varietal improvement  activities were carried out at different Hill Agriculture Research Stations during 2000/2001 and 2001/2002, wheat season. Hybridization and plantation of generation lines were done at NWRP. Bhairahawa and DOAB, Khumaltar on both the years. 25th  and  26th Nepal…………………

A long term soil fertility experiment in rice-rice-wheat system has been conducted at National Wheat Research Program, Bhairahawa since 1978/79 to evaluate the effect of long term application of mineral fertilizer and organic manure on crop yield and soil properties as well. In the long run, phosphorus was found to be the most limiting factor for grain yield production of both rice and wheat crops and followed by potassium…………………..

A long term soil fertility experiment in rice-rice-wheat system has been conducted at National Wheat Research Program, Bhairahawa since 1978/79 to evaluate the effect of long term application of mineral fertilizer and organic manure on crop yield and soil properties as well. In the long run, phosphorus was found to be the most limiting factor for grain yield production of both rice and wheat crops and followed by potassium…………………..

The experiments were conducted at the Agricultural Implement Research Centre (AIRC), Birganj, Sugauli and Belwa VDCs, Parsa district during Rabi seasons 1998/99 to 2001/02. The experiments consisted of five treatments as seed drilling with Power Tiller Drill (PTD) on untilled soil (T1 ), seed drilling with Furrow Irrigated Raised Bed ( FIRB) seed drill on tilled…………………………

The experiments were conducted at the Agricultural Implement Research Centre (AIRC), Birganj, Sugauli and Belwa VDCs, Parsa district during Rabi seasons 1998/99 to 2001/02. The experiments consisted of five treatments as seed drilling with Power Tiller Drill (PTD) on untilled soil (T1 ), seed drilling with Furrow Irrigated Raised Bed ( FIRB) seed drill on tilled…………………………

On farm evaluation of tillage and crop establishment methods for wheat production were carried out during Rabi season 1998/99 to 2001/02 at Sugauli and Belwa V DCs. Parsa district utilizing participatory framework. The experiment consisted of five treatments as seed drilling with Power Tiller Drill (PTO) on untilled soil (T1 )………………………….

On farm evaluation of tillage and crop establishment methods for wheat production were carried out during Rabi season 1998/99 to 2001/02 at Sugauli and Belwa V DCs. Parsa district utilizing participatory framework. The experiment consisted of five treatments as seed drilling with Power Tiller Drill (PTO) on untilled soil (T1 )………………………….

A field experiment was conducted during winter season of 2001-2002 at Regional Agriculture Research Station Parwanipur with an aim to find out the nitrogen requirement of wheat and the interaction effect between nitrogen and sowing dates. The yield differences recorded on 25^th Nov and 10^th December sowing were not significant………………….

A field experiment was conducted during winter season of 2001-2002 at Regional Agriculture Research Station Parwanipur with an aim to find out the nitrogen requirement of wheat and the interaction effect between nitrogen and sowing dates. The yield differences recorded on 25^th Nov and 10^th December sowing were not significant………………….

Mixed cropping system of wheat ( Triticum aestivum ), either with pea ( Pisum sativum ) or mustard  (Brassica juncea ) is the common practice of farmers having small sized land holding to increase their production from limited land. But they are having low product ion and productivity of wheat, mustard or peas which is the major problem identified i n mixed cropping system of wheat with pea or mustard ……………………………..

Mixed cropping system of wheat ( Triticum aestivum ), either with pea ( Pisum sativum ) or mustard  (Brassica juncea ) is the common practice of farmers having small sized land holding to increase their production from limited land. But they are having low product ion and productivity of wheat, mustard or peas which is the major problem identified i n mixed cropping system of wheat with pea or mustard ……………………………..

Field experiments i n wheat in rice-wheat system were conducted from 1997-98 to 2001-02 at Chambas (Tanahun, 450m asl ) to find out the response on wheat grain and trends of rice+wheat grain yields as well as changes in soi l chemical properties to the application of organic manure or fertilizer or a combination of both over time. The experiments were conducted i n a randomized complete block design with seven treatments replicated four times in the same plots i n all five years………………………..

Field experiments i n wheat in rice-wheat system were conducted from 1997-98 to 2001-02 at Chambas (Tanahun, 450m asl ) to find out the response on wheat grain and trends of rice+wheat grain yields as well as changes in soi l chemical properties to the application of organic manure or fertilizer or a combination of both over time. The experiments were conducted i n a randomized complete block design with seven treatments replicated four times in the same plots i n all five years………………………..

About  eleven  different  types  of  on-farm  trial  were  carried  out  to  evaluate  technologies  and performance of varieties of different crop at three OR sites i.e. Sanda, Bankatti and Burrohihiya of Nawalparasi, Rupandehi and Kapilwastu districts respectively in Wheat Toria. and Rayo at RARS, Bhairahawa command area. The activities were concentrated on varietal improvement, agronomic aspects validation of improve technology. The promising wheat genotypes for upland rainfed and irrigated were BL 1999 and Bhirikuti and in rainfed lowland BL 1887………………………………….

About  eleven  different  types  of  on-farm  trial  were  carried  out  to  evaluate  technologies  and performance of varieties of different crop at three OR sites i.e. Sanda, Bankatti and Burrohihiya of Nawalparasi, Rupandehi and Kapilwastu districts respectively in Wheat Toria. and Rayo at RARS, Bhairahawa command area. The activities were concentrated on varietal improvement, agronomic aspects validation of improve technology. The promising wheat genotypes for upland rainfed and irrigated were BL 1999 and Bhirikuti and in rainfed lowland BL 1887………………………………….

Different types of experiments on different crops were carried out during 2057/58 to 2058/59. The trials conducted at RARS, Parwanipur and simultaneously on farm trials were conducted in the farmer's field of command districts. Considering wheat crop- varietal testing, green manuring effect on wheat in rice-wheat system, different fertility management and different tillage practices were carried out. Among five tested wheat cultivars BL 1965 ranked first (3300 kg/ha) followed by BL 1887 and BL 1923 producing mean yield of 3290 and 3098 kg/ha respectively…………………………..

Different types of experiments on different crops were carried out during 2057/58 to 2058/59. The trials conducted at RARS, Parwanipur and simultaneously on farm trials were conducted in the farmer's field of command districts. Considering wheat crop- varietal testing, green manuring effect on wheat in rice-wheat system, different fertility management and different tillage practices were carried out. Among five tested wheat cultivars BL 1965 ranked first (3300 kg/ha) followed by BL 1887 and BL 1923 producing mean yield of 3290 and 3098 kg/ha respectively…………………………..

Nepal is predominantly an agricultural country where more than 80 per cent people depend on agriculture. The economic growth of the country is highly determined by agricultural production. Among agricultural production, cereal crops occupy the major part which feed the day by day growing population of the country. Wheat is a third major cereal crop grown in the country. Since the introduction of modem varieties of wheat has resulted in increase of both area and production, but the productivity growth has not been experienced so satisfactory…………………………………

Nepal is predominantly an agricultural country where more than 80 per cent people depend on agriculture. The economic growth of the country is highly determined by agricultural production. Among agricultural production, cereal crops occupy the major part which feed the day by day growing population of the country. Wheat is a third major cereal crop grown in the country. Since the introduction of modem varieties of wheat has resulted in increase of both area and production, but the productivity growth has not been experienced so satisfactory…………………………………

Four  genotypes  of  wheat  were  tested  under  five  agro-environment  conditions  in  five terai districts of Eastern Region during 2000/2001-2001/2002. The individual year analysis revealed non-significant result for the year 2000/2001z while in 2001/2002 the results were found significant at Jhapa, Morang, Sunsari and Siraha Districts. The tested genotypes were BL 1473, N L 853, N L 750 and BL 1724…………………………

Four  genotypes  of  wheat  were  tested  under  five  agro-environment  conditions  in  five terai districts of Eastern Region during 2000/2001-2001/2002. The individual year analysis revealed non-significant result for the year 2000/2001z while in 2001/2002 the results were found significant at Jhapa, Morang, Sunsari and Siraha Districts. The tested genotypes were BL 1473, N L 853, N L 750 and BL 1724…………………………

There is a wide gap between potential yield and actual yield. There is much room to capitalize this large un harvested yield and break the yield barrier even with the available technologies. Production and productivity of different crops is still low and needs further attention of the scientists' extensionist and the farmers for the improvement.  This paper summarizes the technologies currently available at hand and technologies in the pipeline. …………………………….

There is a wide gap between potential yield and actual yield. There is much room to capitalize this large un harvested yield and break the yield barrier even with the available technologies. Production and productivity of different crops is still low and needs further attention of the scientists' extensionist and the farmers for the improvement.  This paper summarizes the technologies currently available at hand and technologies in the pipeline. …………………………….

There were altogether twelve different activities under varietal improvement for Terai under timely. Sown irrigated conditions. Out of which included were crossing block cum hybridization, segregation generation lines ( Fl to F7), four screening nurseries, five yield trials (National and International), one wheat varietal display and small plot seed increase of the genotypes included in coordinated varietal trials (CVTs and IETs). The major objectives of this investigation are to identify wheat varieties with high yield potential ( 4 to 5 ton), enhanced resistance to foliar blight complex, durable resistance to leaf rust, tolerance to high temperature regimes during post anthesis period and suitable under Rice-Wheat cropping pattern of the Terai region………………………..

There were altogether twelve different activities under varietal improvement for Terai under timely. Sown irrigated conditions. Out of which included were crossing block cum hybridization, segregation generation lines ( Fl to F7), four screening nurseries, five yield trials (National and International), one wheat varietal display and small plot seed increase of the genotypes included in coordinated varietal trials (CVTs and IETs). The major objectives of this investigation are to identify wheat varieties with high yield potential ( 4 to 5 ton), enhanced resistance to foliar blight complex, durable resistance to leaf rust, tolerance to high temperature regimes during post anthesis period and suitable under Rice-Wheat cropping pattern of the Terai region………………………..

Wheat varietal improvement under timely-sown rainfed  condition  included  12 different  activities. Out of them 5 activities namely 13th Nepal Rainfed Nursery  (NRN),  Triticale  Screening  Nursery (Dual purpose), Durum Screening Nursery over last year's selections, Initial Evaluation Trial (IET), Coordinated Varietal Trial (CVT) were organized by National  Wheat  Research  Program, Bhairahawa, Nepal. Four activities such as F2-MESA, 29th International Durum Screening Nursery IDSN), 15th Semi Arid wheat Screening Nursery (SAWSN) and 5th Semi Arid Wheat Yield Trial (SAWYT) were conducted on CIMMYT materials. Two activities namely regional Bread Wheat Observation Nursery (RBWON) and Regional Bread Wheat Yield Trial  (RBWYT)  on ICARDA materials and one more like advanced Varietal Trial (AVT) timely-sown rainfed was conducted on Indian  materials……………………

Wheat varietal improvement under timely-sown rainfed  condition  included  12 different  activities. Out of them 5 activities namely 13th Nepal Rainfed Nursery  (NRN),  Triticale  Screening  Nursery (Dual purpose), Durum Screening Nursery over last year's selections, Initial Evaluation Trial (IET), Coordinated Varietal Trial (CVT) were organized by National  Wheat  Research  Program, Bhairahawa, Nepal. Four activities such as F2-MESA, 29th International Durum Screening Nursery IDSN), 15th Semi Arid wheat Screening Nursery (SAWSN) and 5th Semi Arid Wheat Yield Trial (SAWYT) were conducted on CIMMYT materials. Two activities namely regional Bread Wheat Observation Nursery (RBWON) and Regional Bread Wheat Yield Trial  (RBWYT)  on ICARDA materials and one more like advanced Varietal Trial (AVT) timely-sown rainfed was conducted on Indian  materials……………………

Majority of the wheat area in Terai is under rice-wheat system. During the post anthesis period of wheat, heat is one of the main constraints, caused by high temperatures followed by hot and dry winds during grain filling stage, which directly affects the grain size and reduce the grain yield of wheat. A total number of 4 varietal improvement activities were conducted under this project at Bhairahawa and 4 coordinated varietal trials at other research stations during 1997/98 wheat season. On the basis of grain yield, grain size, color, disease reactions and maturity days eight lines from 5th HlWYT, four lines from HSWYT, four lines from AVT-LS/I and nine lines from CVT-LS/I were found most promising. These selected genotypes will be promoted for further evaluation in different agrociimatic locations as screening nuirseries and multilocation trials including farmers' field trials during 1998/99 wheat season.

Majority of the wheat area in Terai is under rice-wheat system. During the post anthesis period of wheat, heat is one of the main constraints, caused by high temperatures followed by hot and dry winds during grain filling stage, which directly affects the grain size and reduce the grain yield of wheat. A total number of 4 varietal improvement activities were conducted under this project at Bhairahawa and 4 coordinated varietal trials at other research stations during 1997/98 wheat season. On the basis of grain yield, grain size, color, disease reactions and maturity days eight lines from 5th HlWYT, four lines from HSWYT, four lines from AVT-LS/I and nine lines from CVT-LS/I were found most promising. These selected genotypes will be promoted for further evaluation in different agrociimatic locations as screening nuirseries and multilocation trials including farmers' field trials during 1998/99 wheat season.