- Open Access
Lessons for promotion of new agricultural technology: a case of Vijay wheat variety in Nepal
Agriculture & Food Security volume 7, Article number: 63 (2018)
Wheat is the third important cereal after rice and maize in Nepal. Its yield suffers from several factors such as lack of reliable irrigation, inclement weather, incidence of disease and lack of improved technology. New virulence race Ug99 (Uganda-99) has threatened all available commercial wheat varieties around the world and Asia. Some of the popular varieties of wheat in Nepal are also getting susceptible to different diseases. Vijay is one of the recently released first Ug99-resistant improved wheat varieties for Terai region in Nepal. Nepal has put special emphasis on the seed production and diffusion of this variety to promote rapidly in the farmers’ fields to mitigate the potential epidemics of newly emerging pathotype of stem rust (Ug99). This variety is being promoted by several organizations and seed companies’ before and after its release. Therefore, this study was undertaken to know the seed supply of Vijay and identify the factors that are contributing for its commercialization.
Sunsari, Morang, Rupandehi, Banke and Kailali districts were selected purposely representing Eastern, Western, Mid-western and Far-Western Terai regions of Nepal, respectively. Seed companies, agro-vets (input dealers) and cooperatives involved in Vijay seed multiplication and distribution in the respective districts were selected for the purpose of the study. From the list of agro-vets in respective study sites, a total of 87 wheat seed selling agro-vets were selected randomly as a sample. The sample survey covered 44% of the target population in both categories (dealers and non-dealers of national seed company). Out of total samples, 40% were national seed company dealer agro-vets, while 60% were non-dealers. Multivariate regression analysis was used to find out different factors responsible for commercialization of Vijay seed.
Results indicate that about 67% of the agro-vets were involved in Vijay seed trading and their average time of involvement was 2.65 years. Majority of the agro-vets perceived this variety performed better than other existing popular varieties such as Gautam, Bhrikuti, Aditya and Nepal 297. However, there was still gap in timely supply of the seed. Based on the estimated Certified-1 seed production in 2015/16, Vijay must cover 56.88% (11,943 ha) of total wheat area in Terai, but share of Vijay seed was about 22% of the total wheat seed sold by agro-vets in 2015/16. Nevertheless, it seems that this variety is getting popular in the study area compared to other improved wheat varieties in short time period. The factors influencing commercialization of Vijay were: agro-vets having dealership of national seed company, perception on comparative better performance of Vijay with Nepal 297, total quantity of wheat seed sold by agro-vets and total business transaction of the agro-vets. Moreover, other factors such as pre-release multiplication of Vijay variety by private seed companies and participation on seed related training have found positive contribution on its commercialization.
It seems that the current production of Vijay’s breeder seed is more than enough to cultivate in total wheat area in Terai of Nepal if proper seed cycle is maintained. But this is not in reality. NARC should decentralized foundation seed to private actors such as private seed companies, national seed companies and community-based organizations to maximize the resource use efficiency in the seed cycle through introducing effective monitoring and technical backstopping mechanism from public sector. Therefore, the close coordination and commitment of the public and private seed companies, community seed groups, cooperatives and public extension agencies to multiply seeds in subsequent cycles is required. Moreover, awareness program about superiority of Vijay with other improved wheat varieties should be emphasized for the rapid commercialization of the Vijay seed which would be an instrumental to mitigate the potential epidemics of newly emerging pathotype of stem rust (Ug99) in the future.
Wheat (1,736,849 Mt.) is the third most important cereal after rice (4,299,079 Mt.) and maize (2,231,517 Mt.), contributing 20% of the total cereal production in Nepal . Over 60% of wheat is produced in the Terai (plain) region, though they are also produced in the mid hills and high hills regions of Nepal. Wheat yields suffer from some factors such as lack of reliable irrigation, inclement weather, incidence of disease and lack of improved technology . NWRP  reported stem rust disease of wheat was under control since last six decades in a global basis. New virulence race Ug99 (Uganda-99) has threatened future wheat production, and it has posed new problem since all available commercial wheat varieties around the world and Asia in particular are susceptible to this new biotype of stem rust. Some of the popular varieties of wheat in Nepal are getting susceptible to different disease, e.g., Nepal 297 become susceptible to new biotypes of leaf rust, Bhrikuti moderately susceptible to foliar blight . Therefore, new varieties with high yield potential and resistant to major diseases are needed to replace old varieties from the growers to increase the production and maintain at least the present productivity level .
In Nepal, both formal and informal types of seed system are prevailing. The informal seed system has been playing a significant role in fulfilling seed demand of the farmers . Gauchan et al.  have reported that the formal sector representing public, private and community led seed system is becoming prominent in recent years, even though nearly 90% of the seed supply comes from traditional individual farmer-led model representing mainly informal farmer-based seed system. Until 2017, NARC has released and recommended 43 wheat varieties for different agro-ecological domains, i.e., 26 for Terai and 17 for hills. But, 13 wheat varieties have been denotified and only 30 varieties are under cultivation “Appendix 1” (Official record at NWRP, January 2018). Moreover, it is reported that, NWRP has produced 23 metric tons of wheat breeder seeds and 4.17 metric tons of nucleus seed of only 15 popular wheat varieties in 2015/16 due to shortage of land . About 94% of wheat area was covered by modern varieties in the hills whereas it was 100% in the Terai plains . Other studies at different districts indicate variation in coverage of modern varieties of wheat in Nepal which ranges from 65 to 95% in hilly districts and from 94 to 100% in different Terai districts [25, 31, 32, 35]. Gauchan  has reported more than 15 years age of most of commercially produced rice varieties in Nepal. Similarly, prevalence of older varieties with 12 years of adoption lags and 18 years of weighted varietal age in Nepal was reported by Gautam et al.  and Velasco et al. . The adoption lags can be reduced to promote agricultural technologies using community-based organizations and private seed companies [1, 2, 24]. About 27% adoption gap of improved pigeon pea is reported in Malawi due to incomplete exposure to the improved pigeon pea varieties .
Vijay (BL 3063) is one of the recently released varieties in 2010 for Terai region in Nepal. It was the first Ug99-resistant improved wheat variety developed and released in Nepal . This is also resistant to leaf rust and moderately susceptible to yellow rust and tolerant to spot blotch (HLB) and suitable for harvesting using combined thresher . It has rapid grain filling trait under heat stress conditions having good bread and chapati-making quality . A recent expert elicitation study conducted by NARC-CIMMYT study in 2014 indicated that Vijay is becoming one of the popular wheat varieties in Nepal . Out of several varieties released and disseminated in Nepal in the last 50 years, Vijay is one of the top 5 most popular varieties adopted in Nepal with area coverage of 6% in 2014 (Table 1). NWRP has reported about 21% of estimated area covered by Vijay variety in Nepal based on the supply of breeder seed in 2014.
High-quality genetically pure breeder and foundation seeds are produced mainly by NARC research stations to use for multiplication of next generation of commercial seeds (certified and improved). Recently, private seed companies and some cooperatives are also authorized to produce source seeds (mainly foundation) for subsequent cycle of seed multiplication with close supervision and monitoring of seed certifying agencies. Source seed is the initial generation high-quality genetically pure (breeder and foundation) seed used to produce next generation commercial (e.g., certified, improved) seeds of the same variety . About 44 tons of source seed of Vijay were produced by research stations in Nepal and private seed agencies in 2009–2010 wheat seasons before its release in 2010 September . Nepal has put special emphasis for the seed production and diffusion of this variety to promote rapidly in the farmers’ fields to mitigate the potential epidemics of newly emerging pathotype of stem rust (Ug99). This variety is also being promoted by several organizations and seed companies’ after release. This variety has highly potential for commercialization. Most of the past studies focused on general types of study on wheat variety adoption and farm level impacts [27, 31, 32]. Therefore, this study was undertaken to assess the importance of seed system development for rapid up-scaling of new variety and identify the factors that are contributing to its commercialization.
Selection of study sites and sample
Command areas of the different research centers of Nepal Agricultural Research Council (NARC), viz. Bhairahawa (Rupandehi), Tarahara (Sunsari) and Nepalgunj (Banke), where Vijay variety was tested and being promoted by the NARC research stations and commodity programs were selected purposely for the study. Similarly, Sunsari, Morang, Rupandehi, Banke and Kailali districts were selected purposely representing Eastern, Western, Mid-western and Far-western Terai regions of Nepal as they represent the major wheat growing areas of the selected regions (Fig. 1). As this study focused on speed of seed flow and level of commercialization, agro-vets (seed/input dealers) were selected as respondents rather than farmers. Seed companies, agro-vets (which are input dealers dealing mainly with agricultural inputs such as seeds, fertilizers, pesticides and veterinary medicines in Nepal.) and cooperatives involved in Vijay seed multiplication and distribution in the command areas of above-mentioned offices of NARC were selected to track the seed flow. From the list of agro-vets in respective study sites, a total of 87 wheat seed seller agro-vets including national seed company dealers were selected randomly. In totality, 44% samples of target population in both categories were selected. Out of total samples, 40% were national seed company (NSC) dealer agro-vets and 60% agro-vets were non-dealer agro-vets. The summary of the site selection and sampling technique is presented in Table 2.
Techniques used in data collection and analysis
Desk reviews were undertaken to understand and document varietal development, release and registration process and policies, importance of Ug99 resistant variety and tracking source seed production and multiplication by institutions in Nepal. Different published and unpublished documents of NARC and other institutions were reviewed related to wheat varietal development and dissemination process (focusing on pre-release and after release seed multiplication), including institutional constraints to rapid seed flow in relation to Vijay variety. Institutional survey was conducted with different agro-vets and seed companies. Expert consultation meeting was done at each proposed districts with district agriculture development offices (DADO), plant breeders/researchers and policy makers at central level to know the issues and challenges associated with Vijay variety of wheat in Nepal. After collecting the data, data were compiled, reviewed and cleaned before final analysis for the accuracy of the results. This study used both descriptive as well as inferential statistics. Multivariate regression analysis was used to find out different factors responsible for commercialization of Vijay seed. The details of the model are given below:
where TVS = Total qty. of Vijay variety sold (Own + NSC) in 2015/16 in kg as a proxy for level of up-scaling, DNSC = Dealer of National Seed Company (1 if yes, otherwise 0), DHQ = Distance from district headquarter (km), CVNL = Comparative performance of Vijay with Nepal 297 (1 if better than Nepal 297, otherwise 0), TWS = Total qty. of wheat seed (Own + NSC) sold in 2015/16 (kg), AGP = Age of the proprietor (year), DE = Duration of establishment (year), PT = participation on seed related training (1 if yes, 0 no), DTV = Duration of involvement in Vijay Trading (year), PGV = Perception on presence of required germination of Vijay (1 yes, 0 no), BT = Business Transaction (Total Qty. of cereal seed sold in 2014/15 (kg), PSM = Pre-release seed multiplication by private seed company (yes 1, 0 otherwise), α and β1…β11 = coefficient to be estimated.
Results and discussion
The details of socioeconomic and technical variables related to agro-vets surveyed are presented in Table 3. The education level of the agro-vets proprietor was more or less similar in the study area; on average, it was 11.82 years of education. Similar type of results was obtained in case of age of the proprietors. The wheat seller agro-vets were older (12.34 year) in RARS Tarahara area followed by NWRP area (9.37 year) and RARS Khajura area (9.32 year). The average transaction of seeds and cereals seed in 2014/15 by each agro-vet was about 25.05 Mt and 22.45 Mt, respectively, in the study area. About 10.97 Mt of wheat seeds was sold by agro-vets in 2015/16, which includes both subsidized seed provided by government of Nepal (GoN) and non-subsidized seed. Average quantity of subsidized Vijay seed (4.28 Mt) sold by agro-vets in 2015/16 was higher than non-subsidized seed (2.79 Mt). This quantity was higher than the Vijay seed sold in the year 2014/15 in both categories. Majority of the agro-vet proprietors (90%) were received training related to seed production and marketing management. About 67% of the agro-vets were involved in Vijay seed trading, and their average time of involvement in Vijay trading was about 2.65 years. Seed company (SC) has been playing important role to create awareness about Vijay seed in the study area. About 85% of the agro-vets were selling Vijay seed in their own working single district, and they had mixed response about its availability on time, required quality and quantity. The Vijay variety is getting popular in the study area as more than 50% of the agro-vets had perceived that this variety performs better than other existing popular varieties such as Gautam, Bhrikuti, Aditya and Nepal 297. Gauchan and Timsina  reported cost–benefit analysis of Vijay (2.33) in comparison with existing popular varieties like Gautam (2.12), Bhrikuti (2.19) and Nepal 297 (2.6) indicates that it is economically at par or superior in some specific cases when it is grown in medium land type with irrigation. Other than economic benefits, farmers prefer Vijay due to its bold grain, attractiveness, natural maturity and good taste of bread/chapatti. Moreover, it performs well and high yielding in medium land as compared to low land [11, 29].
Commercialization prospective of Vijay seed
Public sector research organizations such as NWRP and other research centers produce breeder and foundation seeds, while NSC, seed companies, cooperatives and producer groups mainly produce and multiply certified or truthfully labeled seeds. In addition to Vijay seed multiplication, its distribution and commercialization are important aspects. So to find out the different factors that contribute to upscale, the Vijay seed marketed and factors determining extent of marketing was analyzed using ordinary least square (OLS) regression. Total qty. of Vijay variety sold (Own + NSC) in 2015/16 was used as dependent variable and different explanatory variables such as dealer of national seed company, distance from district head quarter (km), comparative performance of Vijay with Nepal 297, total qty. of wheat seed (Own + NSC) sold in 2015/16 (kg), age of the agro-vets proprietor (year), duration of agro-vets establishment (year), participation on seed related training (if yes 1), duration of involvement in Vijay seed trading (year), perception on presence of required germination of Vijay (if yes 1), total business transaction of the agro-vets (total qty. of seed sold in 2014/15 in kg) and pre-release seed multiplication by private seed company (if yes 1) were used as independent variables. To see the net effect of different variable, three models were run. Multicollinearity test was done among variable to increase the explanatory power of the model. The F test shows that all three models are best fitted. In our analysis, we used the standardized coefficients to see the real effect of variable.
Agro-vets having dealership of national seed company were used as independent variable in model 1, which is highly significant. The result shows 1 standard deviation (SD) increase in dealership of NSC, chances to increase in selling of Vijay seed by 0.426 SD compared to non-dealer agro-vets. This single variable covered the 18% variation of the model. In the last 3 years (2013/14–2015/16), there is increasing trend in the quantity of Vijay variety allocated by NSC. It was 10% of total wheat variety in 2013/14 which was increased to 14% in 2015/16.
In the second model, we had used distance of agro-vets from district head quarter and comparative performance of Vijay with Nepal 297 as a control variable to determine the net effect of dealership. In this model, the effect of dealership on selling of Vijay seed is still significant; however, its explanatory power decreased by 0.11 SD. Moreover, negative relationship between distance of agro-vets from district head quarter and Vijay selling quantity is observed. Comparative performance of Vijay with Nepal 297 is also contributing significantly on selling of Vijay variety; it shows 1 SD increase in agro-vets who felt Vijay has better performance than Nepal 297, chance to increase in selling of Vijay Seed by 0.274 SD compared to agro-vets who felt worse performance of Vijay than Nepal 297. The second model is also best fitted, and the variation covered by the model is about 28%.
Out of 11 variables used in model three, only three variables, viz. comparative performance of Vijay with Nepal 297, total quantity of wheat sold and total business transaction of the agro-vets, are found significant (Table 4). The explanatory power of comparative performance of Vijay with Nepal 297 is reduced by 0.28 SD than model 2. The results show that 1 SD increase in quantity of total wheat seed sold by agro-vets response to increase in Vijay sold by 0.560 SD. Similarly, 1 SD increase in total quantity of seed sold by agro-vets, chance to decrease in quantity of Vijay sold by 0.365 SD. It means, among the wheat seeds selling, agro-vets have been giving priority for Vijay seed; however, agro-vets who had higher business transaction give lesser priority for Vijay. It may be due to higher profit margin in vegetables and hybrid rice seed compared to wheat seed .
Vijay seed multiplication and flow in the study area
The Vijay variety of wheat was released in 2010. However, the seed multiplication of this variety was started before its release. National Wheat Research Program (NWRP) of Nepal Agricultural Research Council (NARC) is producing only breeder seed of this variety. In totality, it had provided Vijay breeder seed to seven private seed companies and four different Regional/Agricultural Research Stations (R/ARS) of NARC few years before release of this variety. Among the different private seed companies, Kalika Seed Company from Rupandehi district had started to multiply 40 kg of breeder seed in 2007/8. It had produced foundation seed and then again multiply this foundation seed to C1 (Certified one) in own farm as well as in farmers field in contract production. In addition, different International Non-governmental organizations (I/NGOs) and projects played important role to multiply this variety before its release. For example, out of 18, 486 kg seed produced by Kalika Private Seeds Company, about 11,986 kg seed was purchased by different organizations using USAID-Famine Seed Project funds for further pre-release seed multiplication in the 2009–2010 cycle . Farmers were also actively participated in its multiplication through participatory varietal selection. NWRP had distributed about 3382 kg of breeder seed to different private seed companies and R/ARS for its multiplication before release of this variety.
After release of this variety, more private seed companies are attracted and different R/ARS of NARC have been involved to multiply this variety to commercialize it. Until 2016, about 15 private seed companies and 11 R/ARS of NARC have been involved to produce foundation seed of this variety. Moreover, national seed company and other I/NGOs have been involved to produce foundation seed to fulfill their program requirements. The C1 seed of Vijay variety has been produced through different modalities such as contract production of private seed companies with farmers, private Seed Companies’ own farm, contract production of District Agriculture Development Offices (DADOs) with farmers group, community-based seed multiplication, contract production of agro-vets with farmer and production on national seed company’s own farm “Appendix 2.”
Until 2015/16, NWRP has produced 29 Mt of Vijay’s breeder seed. One ton of breeder seed and 15 Mt of foundation seed is adequate to meet the 5% wheat area (36,000 ha) for Nepal if seed multiplication occurs regularly in the prescribed seed multiplication ratio (1:15) and prescribed seed cycle (breeder to foundation and foundation to certified seeds (C1 and C2) with proper planning and coordination . Based on this assumption and availability of breeder seed, it is estimated that about 62 Mt foundation seed, 1710 Mt C1 seed and 21,498 Mt C2 seed available in the market which is more than enough to cover the total wheat area in Nepal. However, production of C2 seed was not in practice in the field even it is the component of seed cycle. Moreover, based on the estimated C1 seed in 2015/16, it must cover 56.88% (11,943 ha) of total wheat area by Vijay variety in Terai “Appendix 3”. It is found that Vijay wheat variety covers about 22% of the share on total wheat seed sold by agro-vets in 2015/16. An expert panel interview carried out for this study in the study areas expressed about 17% area covered by Vijay variety. Similarly, a national level expert elicitation conducted by CIMMYT-NARC collaborative study under Standing Panel Impact Assessment of the CGIAR (SIAC) in Nepal estimated 5.8% of the wheat area in Nepal in 2014 .
It shows inefficiency of the national R&D organization in the promotion and use of Vijay seed in the country. Similar result was reported by Ghimire et al.  and Timsina et al. [33, 34]. Little interaction and communication among various actors within the seed delivery chain resulted in a weak system that supplies less than 20% of seed requirement of farmers [4, 20]. Farmer seed networks can function efficiently in varietal diffusion . Innovative platforms should be established in order to facilitate open communication and dialogue among all actors in the seed delivery system for its effective delivery . Gauchan et al.  reported that well-planned strategies are required for further use of breeder’s seeds and suggested to introduce mechanism of providing incentive and penalties for proper utilization of breeder to produce foundation seed by concerned agencies.
Proper planning and distribution of Vijay seed is required to create efficiency in resources use in the different research stations of NARC. If breeder seed is not available in all NARC stations, proper coordination and monitoring mechanism should be developed to produce breeder seed. It will also solve the current problem of land shortage to produce source seed in some of the research stations of NARC. Foundation seed production and supply should be decentralized to private actors such as private seed companies, national seed companies and community-based organization (CBOs) to maximize the resource use efficiency in the seed cycle. Therefore, the commitment of the public and private seed companies, community seed groups, cooperatives and public extension agencies to multiply seeds in subsequent cycles is required. The support for processing and storage, awareness about improved seed technologies and mechanization for foundation and certified seed is required at community level for community-based seed production . SARPOD  has also emphasized to focus on production of breeder seed by NARC and foundation seed by private seed companies to capture their comparative advantages and promote resource use efficiencies. In addition, public–private and community partnership in seed production and supply and developing network of diverse set of actors and institutions are required to meet the demand and supply of quality seed in required time. Gauchan  highlighted that strengthening breeding by public sector, seed multiplication by community sector and marketing by private sector are required for sustainable seed business in Nepal. The details of Vijay seed flow are presented in “Appendix 2.”
Vijay is the first Ug99-resistant wheat variety developed and released in Nepal by NARC in 2010. However, the seed multiplication of this variety started before its release since 2007/8 through the involvement of private seed companies. Until 2010, about three Mt. of breeder and seven Mt. of Foundation seed had already been produced for its rapid dissemination before its release. About 67% of the agro-vets were involved in Vijay seed trading, and their average time of involvement was about 2.65 years. More than 50% of the agro-vets perceived that this variety performed better than other existing popular varieties such as Gautam, Bhrikuti, Aditya and Nepal 297. However, there is still mismatch between demand and supply of seed. Based on the availability of breeder seed of Vijay, it is estimated that about 62 Mt foundation seed, 1710 Mt. C1 seed and 21,498 Mt. C2 seed available in the market in 2015/16, which is more than enough to cover the total wheat area in Nepal. However, production of C2 seed was not in practice recently in the field even it is the component of seed cycle. Moreover, based on the estimated C1 seed in 2015/16, it must cover 56.88% (11,943 ha) of total wheat area by Vijay variety in Terai. But it has been found that Vijay seed shared about 22% on total wheat seed sold by agro-vets in 2015/16 and actual farm level use and adoption is estimated to be much lower. Regression analysis showed that presence of dealership of agro-vets with national seed company, relative performance of Vijay with Nepal 297, quantity of wheat seed sold by agro-vets were found to have significant positive contribution on Vijay seed sold. Similarly, total business transaction of the agro-vets was found to have significant negative contribution on Vijay seed selling. Among the wheat seeds, agro-vets has been giving priority to Vijay seed; however, agro-vets who had higher business transaction gave lesser priority to Vijay. It may be due to higher profit margin in vegetables and hybrid rice seed compared to wheat seed. In addition, other factors such as pre-release multiplication of this variety by private seed companies and participation on seed related training have found positive contribution on the commercialization of Vijay variety. This implies that future crop varietal improvement research program should focus on pre-release seed multiplication and fast-track release to rapidly promote commercialization of the crop varieties in the short period.
Moreover, from an analysis, we can conclude that the proper planning and distribution of Vijay seed is required to create resource use efficiency in the different research stations of NARC. NARC as a public research agency with expertise in plant breeding should focus only on breeder seed production, while foundation seed should be decentralized to private actors to increase resource use efficiency in the seed cycle. Therefore, close coordination and commitment from the private seed companies, national seed companies and community-based organization (CBOs) such as community seed groups, cooperatives and public extension agencies is required to multiply seeds in subsequent cycles. Furthermore, awareness program comparing good varietal traits of Vijay with other improved wheat varieties should be emphasized to accelerate the dissemination of Vijay seed rapidly in the country which would be an instrumental to mitigate the potential epidemics of newly emerging pathotype of stem rust (Ug99) in the future.
District Agriculture Development Office
Government of Nepal
Nepal Agricultural Research Council
National Wheat Research Program
Private seed company
National seed company
Regional Agricultural Research Station
Socioeconomics and Agricultural Research Policy Division
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KPT was the lead investigator and the initiator of the study also responsible for literature search and write-up and finalization of the manuscript. YNG and DG were responsible for the overall study design and provided critical feedback on the manuscript. SS and SPA were responsible for filed study and drafting manuscript. All authors read and approved the final manuscript.
We are grateful for the financial support from NARC for enabling the collection of data. We thank all respondents who were participated in the study. We would like to thank Mr. Jeevan Lamichhane for his suggestions.
The authors declare that they have no competing interests.
Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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All authors agree and consent for the article to be published.
Ethical approval and consent to participate
Oral informed consent was obtained from each respondent from each of the participating agro-vets and other stakeholders.
The funding was provided by Nepal Agricultural Research Council (NARC).
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Timsina, K.P., Ghimire, Y.N., Gauchan, D. et al. Lessons for promotion of new agricultural technology: a case of Vijay wheat variety in Nepal. Agric & Food Secur 7, 63 (2018). https://0-doi-org.brum.beds.ac.uk/10.1186/s40066-018-0215-z
- Seed flow
- Business transaction