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Journal articles on the topic 'Improved varieties'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Fagade, S. O., P. G. Pillai, and J. K. Kehinde. "Improved Rice Varieties Released in Nigeria." International Rice Research Newsletter 13, no. 1 (1988): 17–18. https://doi.org/10.5281/zenodo.7128449.

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This article 'Improved Rice Varieties Released in Nigeria' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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2

KEHINDE, Ayodeji Damilola. "DOES CREDIT ACCESS IMPROVE ADOPTION INTENSITY OF IMPROVED MAIZE SEED VARIETIES?" Cercetari Agronomice in Moldova 53, no. 4 (2021): 434–44. http://dx.doi.org/10.46909/cerce-2020-037.

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This study investigated the effect of credit access on the adoption intensity of improved maize varieties in Osun State. A number of 150 maize farmers were selected through a multistage sampling procedure from using a structured questionnaire. Descriptive statistics, adoption index, and Tobit regression model were used to analyse the data collected. The results showed that Majority of maize farmers were over 40 years (52.6%), male (87%), and married (87%). The result also showed that majority of the farmers did not adopt improved maize varieties (55%) in the state. Swan 1 improved variety was

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3

A, Kolapo, Ogunyemi OV, Ologundudu OM, Adekunle IA, Akinloye MO, and Komolehin F. "Farmers' choice of varieties and demand for improved cassava stems in Nigeria." International Journal of Agricultural Research, Innovation and Technology 11, no. 2 (2021): 42–51. https://doi.org/10.3329/ijarit.v11i2.57254.

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In this study, we used a household level survey to assess choices of varieties and demand for improved cassava varieties. A multivariate probit model was used to examine the determinants of choice decisions of the farmers for different varieties preventing potential endogeneity and measurement error. A Linearized Almost Ideal Demand System (LA/AIDS) model was used to analyze the demand system for improved cassava varieties. The results of the (LA/AIDS) model indicated farmers were very price sensitive to changes in improved stem prices and incomes. We suggest that intervention program that wil

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4

Varamisra, V., L. Chankasam, K. Sirivong, S. Suvanatane, and T. Nguansaj. "Improved Rice Varieties Released in North Central Thailand." International Rice Research Newsletter 13, no. 6 (1988): 25–26. https://doi.org/10.5281/zenodo.7146266.

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This article 'Improved Rice Varieties Released in North Central Thailand' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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5

Fitsum, Daniel. "Impact of Improved Wheat Varieties Adoption on Productivity: Disparity Among the Major Administrative Regions of Ethiopia." Greener Journal of Agricultural Sciences 7, no. 10 (2017): 294–303. https://doi.org/10.15580/GJAS.2017.10.112717174.

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This study examines the regional disparity in the impact of adoption of improved wheat varieties on productivity using 1,611 sample farm households in four major administrative regions of Ethiopia. Propensity score matching (PSM) technique was employed since it is an increasingly utilized standard approach for evaluating impacts using observational data. It is found that adoption of improved wheat varieties doesn't have homogenous positive and significant impact on productivity growth in all of the administrative regions considered. Thus, the study recommends that the agricultural research

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6

FITSUM, Daniel. "Impact of Improved Wheat Varieties Adoption on Productivity: Disparity among Agroecological Zones of Ethiopia." Greener Journal of Agricultural Sciences 8, no. 9 (2018): 179–96. https://doi.org/10.15580/GJAS.2018.9.082218121.

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This study examines the agroecologic zonal disparity in the impact of adoption of improved wheat varieties on productivity using 1,611 sample farm households in four major administrative regions of Ethiopia. Propensity score matching (PSM) technique was employed since it is an increasingly utilized standard approach for evaluating impacts using observational data. It is found that adoption of improved wheat varieties doesn't have homogeneous positive and significant impact on productivity growth in all of the agroecologic zones considered. Thus, the study recommends that the agricultural r

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7

Atlaw, Eshbel, Muluneh Mihretu, and Awol Mohamed. "Evaluation of improved Cassava (Manihot esculanta Crantz) varieties in mid land area of South Omo Zone, Ethiopia." International Journal of Agricultural Research, Innovation and Technology 12, no. 1 (2022): 101–4. https://doi.org/10.3329/ijarit.v12i1.61038.

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Cassava is one of the most important foods security crops, especially in those regions disposed to difficult crop environments. The crop is also grown in the southern part of Ethiopia and plays an important role for home consumption, animal feed and source of income for small-scale farmers. However, its productivity is still low due to the lack of improved planting materials. Therefore, the experiment was conducted at Jinka Agricultural Research Center’s research site during the 2018 and 2019 consecutive cropping seasons to investigate the adaptability of improved cassava varieties and t

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8

Bhatta, Ashmita, Akash Gupta, and Pankaj Prashad Joshi. "Adoption of improved wheat varieties at Kanchanpur, Nepal." Archives of Agriculture and Environmental Science 7, no. 4 (2022): 577–84. http://dx.doi.org/10.26832/24566632.2022.0704015.

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Usage of improved varieties raises the crop yield. To assess the adoption status of improved wheat varieties in the Kanchanpur district, this study investigated the varietal coverage of wheat along with factors affecting the adoption of improved varieties. A pre-tested interview schedule was administered to interview 90 randomly selected wheat-producing households in Bhimdutta, Bedkot and Dodhara Chandni (Mahakali) municipality. A binary logistic regression was used for triangulating the effect of different variables on the adoption of improved wheat varieties. Besides, descriptive statistics

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9

Soe, Ei Thazin, Yoshifumi Takahashi, and Mitsuyasu Yabe. "Adoption of Improved Soybean Varieties and Differences in Technical Efficiency Between Improved and Local Soybean Varieties in Southern Shan State, Myanmar." Journal of Agricultural Science 12, no. 8 (2020): 55. http://dx.doi.org/10.5539/jas.v12n8p55.

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This study determined the factors influencing the adoption of improved soybean varieties and examined the technical efficiencies of improved and local soybean varieties production in Southern Shan State, Myanmar. For this study, data from a sample of 337 respondents were collected by employing a multi-stage random sampling method. Logit model was adopted to determine the factors influencing the adoption of improved soybean varieties. Additionally, a stochastic production frontier was used to examine technical efficiencies of improved and local soybean varieties. Results show that factors that

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10

Bashar, M. K., R. K. Das, M. A. Islam, M. Nasiruddin, and N. M. Miah. "Two Improved Upland Rice Varieties for Bangladesh." International Rice Research Newsletter 15, no. 1 (1990): 20. https://doi.org/10.5281/zenodo.7178971.

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This article 'Two Improved Upland Rice Varieties for Bangladesh' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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11

Kyomugisha E, Fina, O., and Wycliffe, T. "ANALYSIS OF THE MARKET PERFORMANCE OF IMPROVED BEAN VARIETIES FOR ENHANCING HOUSEHOLDS INCOME IN RUKIGA DISTRICT." International Journal of Agriculture, Environment and Bioresearch 10, no. 03 (2025): 217–31. https://doi.org/10.35410/ijaeb.2025.5993.

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Improved agricultural technologies such as enhanced crop varieties are increasingly recognized as essential for boosting household incomes and ensuring food security in rural communities. In Uganda, the adoption of improved bean varieties has shown potential to uplift smallholder farmers by providing better yields and access to premium markets. However, to realize these benefits, a clear understanding of market performance and dynamics is crucial. The study made an analysis of the market performance of improved bean varieties for enhancing household’s income in Rukiga District. It was conducte

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12

Xiao, J. H. "Compatibility of Six Rice Varieties with Indica and Japonica Varieties." International Rice Research Newsletter 14, no. 1 (1989): 6. https://doi.org/10.5281/zenodo.7146321.

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This article 'Compatibility of Six Rice Varieties with Indica and Japonica Varieties' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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13

OMANYA, G. O., E. WELTZIEN-RATTUNDE, D. SOGODOGO, et al. "PARTICIPATORY VARIETAL SELECTION WITH IMPROVED PEARL MILLET IN WEST AFRICA." Experimental Agriculture 43, no. 1 (2007): 5–19. http://dx.doi.org/10.1017/s0014479706004248.

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A reconnaissance survey and participatory varietal selection trials (PVS) were conducted in four major pearl millet-growing countries of the Sahel between 2001 and 2003. The studies aimed to identify farmers' preferences in improved pearl millet varieties, increase awareness, test new varieties and enhance farmers' access to the improved varieties. Farmers selected five out of 10 tested varieties, with preferred characteristics, namely, maturity cycles of 80–90 d in the Sahel and 90–100 d in the Sudanian agro-ecozones, acceptable grain yield, compact and long (30–100 cm) panicles, a large numb

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14

Jana, B. R., K. Anupama, R. Lakshmi Vaishna, and Anup Das. "Development of Two Improved Water Chestnut Varieties (Trapa spp.) and their Characterization Using RAPD and ISSR Markers." Journal of Advances in Biology & Biotechnology 28, no. 7 (2025): 975–86. https://doi.org/10.9734/jabb/2025/v28i72614.

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Purpose: To develop improved varieties of water chestnut in terms of yield, and TSS and to compare these two varieties with two local varieties using RAPDs and ISSR molecular markers. Methods: Improved Red Spineless (IRS) and Improved Green Spineless (IGS) plants were chosen from the Red spineless and Green spineless biotypes in 2016-2017 at the National Research Centre for Makhana, Darbhanga, Bihar. These improved varieties were grown in multilocation trails till 2021. The improved varieties and two popular varieties (RSLL and RSSL) were analysed with 10 RAPD and 10 ISSR markers and the data

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15

Mansaray, Bashiru, Shaosheng Jin, and Godwin S. Agbemavor Horlu. "Do Land Ownership and Agro-Ecological Location of Farmland Influence Adoption of Improved Rice Varieties? Evidence from Sierra Leone." Agriculture 9, no. 12 (2019): 256. http://dx.doi.org/10.3390/agriculture9120256.

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This study investigates the impact of farmland ownership and agro-ecological location on the adoption of the two most important sources of improved rice varieties (NERICA and ROK) in the context of Sierra Leone. In terms of farmland ownership, the results showed that farmers who cultivated their own land had a higher tendency of remaining as non-adopters of improved varieties, but those who rented farmland or were engaged in sharecropping had higher adoption rates of improved rice varieties. Also, the location of farmland (uplands or inland valley swamps) determined the rates of adoption of im

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16

Tieman, Denise, Guangtao Zhu, Marcio F. R. Resende, et al. "A chemical genetic roadmap to improved tomato flavor." Science 355, no. 6323 (2017): 391–94. http://dx.doi.org/10.1126/science.aal1556.

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Modern commercial tomato varieties are substantially less flavorful than heirloom varieties. To understand and ultimately correct this deficiency, we quantified flavor-associated chemicals in 398 modern, heirloom, and wild accessions. A subset of these accessions was evaluated in consumer panels, identifying the chemicals that made the most important contributions to flavor and consumer liking. We found that modern commercial varieties contain significantly lower amounts of many of these important flavor chemicals than older varieties. Whole-genome sequencing and a genome-wide association stud

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17

Gairhe, Samaya, Devendra Gauchan, and Krishna Timsina. "Adoption of Improved Potato Varieties in Nepal." Journal of Nepal Agricultural Research Council 3 (May 8, 2017): 38–44. http://dx.doi.org/10.3126/jnarc.v3i1.17274.

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Nepal is one of the top twenty countries where potato contributes substantially for the human diet. Enhancing adoption of improved potato varieties could impact on farmer’s income, household food and nutritional security. As such, using a multistage sampling procedure, a study was conducted to assess the determinants of improved potato varieties adoption in Nepal covering 180 samples in four districts, two in hills and two in Tarai region. The study revealed that; Kavre and Bardiya districts in the hills and Tarai, respectively, were dominated by improved potato varieties adoption. On the othe

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18

White, Timothy L., Mary L. Duryea, and Gregory L. Powell. "Genetically Improved Pines for Reforesting Florida’s Timberlands." EDIS 2018, no. 1 (2018): 6. http://dx.doi.org/10.32473/edis-fr007-2017.

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Just as farmers plant the best-available varieties of crops that have been developed through many generations of breeding, forest landowners should plant the best-available genetically improved varieties of pines for reforestation of their timberlands. This 8-page fact sheet written by Timothy L. White, Mary L. Duryea, and Gregory L. Powell and published by the UF/IFAS School of Forest Resources and Conservation explains how planting genetically improved varieties of pines can increase the productivity, health, and value of reforested Florida timberlands. edis.ifas.ufl.edu/fr007

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19

Mohammed, S. B., Pangirayi, B. T., Gracen, V., et al. "FACTORS DETERMINING ADOPTION OF IMPROVED COWPEA VARIETIES AMONG SMALLHOLDER FARMERS IN THE DRY SAVANNAS OF NIGERIA." Journal of Agripreneurship and Sustainable Development 2, no. 1 (2019): 132–43. http://dx.doi.org/10.59331/jasd.v2i1.58.

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The success of modern-day plant breeding is determined by adoption and use of improved crop varieties. Several improved cowpea varieties have been released in the last few decades in Nigeria. This study thus investigated the extent of use of improved cowpea varieties among smallholder farmers and factors influencing their adoption. To understand the extent and factors influencing adoption of these varieties, we used primary data from 420 households spread across 36 communities of three major cowpea growing states in the north-western part of Nigeria. Data collected on the use and non-use of im

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20

Amengor, Natson, Bright Owusu-Asante, Kwadwo Adofo, et al. "Adoption of Improved Sweetpotato Varieties in Ghana." Asian Journal of Agricultural Extension, Economics & Sociology 23, no. 3 (2018): 1–13. http://dx.doi.org/10.9734/ajaees/2018/39874.

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21

Owusu, Victor, and Emmanuel Donkor. "Adoption of Improved Cassava Varieties in Ghana." Agricultural Journal 7, no. 2 (2012): 146–51. http://dx.doi.org/10.3923/aj.2012.146.151.

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22

Sall, Samba, David Norman, and Allen M. Featherstone. "Adaptability of improved rice varieties in senegal." Agricultural Systems 57, no. 1 (1998): 101–14. http://dx.doi.org/10.1016/s0308-521x(97)00072-3.

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23

Shamil, Alo, Gezahegn Abebe, and Getachew Wakjira. "Study on Performance Evaluation of Tomato (Lycopersicon esculentum Mill.) Varieties Under Off-Season Condition at Teppi, South Western Part of Ethiopia." Greener Journal of Agricultural Sciences 7, no. 5 (2017): 120–25. https://doi.org/10.15580/GJAS.2017.5.032317045.

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The cultivated tomato (Lycopersicon esculentum Mill.) is world’s second most important vegetable after potato in terms of production. The major tomato producing regions of Ethiopia are Oromiya, Amhara, Tigray and S.N.N.P.  The crop is cultivated under irrigation largely in the rift valley areas. Ten released tomato varieties of different growth habit and type were brought from Melkassa agricultural research center and evaluated  in randomized complete block design with three replication during 2007 and 2008 cropping season at Teppi. The experiment was carried out to test the ad

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24

Tanimonure, V. A., R. M. Yewande, E. O. Fatokimi, and O. A. Williams. "Determinants of Farmers' Willingness to Pay for Improved Varieties of Pigeon Pea in Oyo State, Nigeria." International Journal of Environmental and Agriculture Research 11, no. 3 (2025): 105–13. https://doi.org/10.5281/zenodo.15151628.

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<strong>Abstract</strong><strong>—</strong> Despite the pigeon pea's significance as a nutritious and affordable protein source, its production remains low due to the lack of improved, high-yielding seed varieties. This study, therefore, examines the factors influencing farmers' willingness to pay (WTP) for improved pigeon pea varieties in Oyo State, Nigeria. Using a multi-stage sampling technique, 150 pigeon pea farmers were selected, and data were collected through a structured questionnaire. The contingent valuation method and logistic regression model were employed to analyze WTP and

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25

Regasa, Dibaba Wake, Hagos Mesfin Afework, Yirga Chilot, and Habte Endeshaw. "Adoption and Perception of Farmers towards Attributes of Improved Teff (Quncho) Varieties: Evidence from Benishangul-Gumuz Region of Ethiopia." Greener Journal of Agricultural Sciences 9, no. 2 (2019): 229–41. https://doi.org/10.5281/zenodo.3384245.

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<strong>Adoption of improved <em>Teff</em> varieties (<em>Quncho</em>) is very important to increase productivity and it can also improve food security.</strong><strong> </strong><strong>To get the expected benefit, the technology should be adopted well by smallholder farmers. However, the rate of adoption of improved varieties in the country has remained low. Hence, the study looks in to preferences of small-holder farmers to varietal attributes that determine the adoption of <em>Teff</em> varieties in the study area. </strong><strong>In this study, multistage sa

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26

MA, Ogeto, Mohammed JH, and Bedada DG. "Adoption of improved potato varieties in jeldu district, oromia region, Ethiopia: a double-hurdle model." International Journal of Agricultural Research, Innovation and Technology 9, no. 2 (2019): 15–22. https://doi.org/10.3329/ijarit.v9i2.45405.

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Smallholder potato producers in Jeldu district produce potato for both home consumption and market. Adoption of improved varieties is suggested to improve and diversify farmers’ household income. This study intents to identify factors determining adoption and intensity of adoption of improved potato varieties in Jeldu district of West Shewa zone, Oromia region, Ethiopia. Both primary and secondary data were used. The primary data were collected from 140 sample households’ selected using two-stage random sampling techniques. Descriptive statics and double hurdle econometric model we

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27

BAYE, Belay, and Daniel FITSUM. "Effect of Improved Agricultural Information & Technologies Adoption on Productivity: The Case of Wheat in Ethiopia." Greener Journal of Agricultural Sciences 8, no. 4 (2018): 082–89. https://doi.org/10.15580/GJAS.2018.4.042018060.

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This study examines the impact of adoption of improved wheat varieties and information regarding improved wheat management practices on productivity using 1,611 farm household samples in four major administrative regions of Ethiopia. Propensity score matching (PSM) technique was employed since it is an increasingly utilized standard approach for evaluating impacts using observational data of a single period. It is found that adoption of improved wheat varieties and information regarding improved wheat management practices appears to significantly increase productivity growth on the average by

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28

Zulkifli, M. S. S. Ali, I. M. Fahmid, et al. "The performance of the distribution and use of improved varieties of rice in West Java Province." IOP Conference Series: Earth and Environmental Science 892, no. 1 (2021): 012025. http://dx.doi.org/10.1088/1755-1315/892/1/012025.

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Abstract West Java Province is one of the centers of rice production in Indonesia. The use of improved varieties continues to be pursued to support the increase in production. This study aims to analyze the performance and problems of distribution and the use of improved varieties in rice farming. The study was conducted in Majalengka and Cianjur Districts in 2020. The study sample consisted of 60 rice farmers and research-related institutions. Data analysis was carried out quantitatively by calculating the percentage of the distribution area and qualitatively descriptive. The results of the s

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29

Olasehinde, Toba Stephen, Fangbin Qiao, and Shiping Mao. "Impact of Improved Maize Varieties on Production Efficiency in Nigeria: Separating Technology from Managerial Gaps." Agriculture 13, no. 3 (2023): 611. http://dx.doi.org/10.3390/agriculture13030611.

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Researchers and policymakers are concerned about the substantial and increasing yield gap between sub-Saharan Africa and the rest of the world. High-yielding improved varieties are widely perceived as a means to close this gap. This study combines impact evaluation and production analysis techniques, which mitigate estimation biases stemming from observed and unobserved heterogeneity, to estimate the effects of improved varieties on maize productivity using a unique, recent, and nationally representative household survey. A linear endogenous treatment–effect model based on a matched sample obt

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30

Fitsum, Daniel, and Belay Baye. "Impact of Improved Wheat Varieties and Information's Adoption on Productivity: Disparity among the Major Administrative Regions of Ethiopia." Greener Journal of Agricultural Sciences 8, no. 10 (2018): 266–76. https://doi.org/10.15580/GJAS.2018.10.100118041.

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<strong>This study examines the regional disparity in the impact of adoption of improved wheat varieties and information regarding improved wheat management practices on productivity using 1,611 sample farm households in four major administrative regions of Ethiopia. Propensity score matching (PSM) technique was employed since it is an increasingly utilized standard approach for evaluating impacts using observational data. It is found that adoption of improved wheat varieties and information regarding improved wheat management practices doesn't have homogenous positive and significant impa

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31

Chandirasekaran, Rajamohan, Thomas D. Warkentin, Yantai Gan, et al. "Improved sources of resistance to ascochyta blight in chickpea." Canadian Journal of Plant Science 89, no. 1 (2009): 107–18. http://dx.doi.org/10.4141/cjps07210.

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Successful chickpea production in western Canada typically requires multiple applications of fungicides to minimize the severity of ascochyta blight (AB) caused by Ascochyta rabiei (Pass.) Lab. Although planting resistant cultivars could be economical and environmentally safer than fungicide use, varieties with a high level of resistance are not available. The objective of this research was to identify potentially useful parents for breeding programs aimed at the northern Great Plains by assessing the AB reaction of 12 desi and 12 kabuli chickpea varieties for their AB reaction on leaves, stem

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32

E.W, Njeru,, Munyua, C.N., and Kinuthia L.K. "Influence of Farm Size on Adoption of Improved Coffee Varieties by Smallholder Farmers in Mathira East Sub-County, Nyeri County, Kenya." International Journal of Research and Innovation in Social Science IX, no. V (2025): 3284–92. https://doi.org/10.47772/ijriss.2025.905000255.

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Coffee productivity in Kenya has been on decline while the global demand has been on the rise. Mathira East Sub-County has not been left out with notable decline since the 1980s negatively affecting the local and national economy. The decline is attributed to rising costs of farming and drop in yield from traditional coffee varieties. Despite introduction of improved coffee varieties, productivity has remained low. Thus, this paper investigated the influence of farm size on the adoption of the improved coffee varieties by smallholder farmers in Mathira East Sub- County. The study adopted the c

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33

Ogeto, MA, JH Mohammed, and DG Bedada. "Adoption of improved potato varieties in jeldu district, oromia region, Ethiopia: a double-hurdle model." International Journal of Agricultural Research, Innovation and Technology 9, no. 2 (2020): 15–22. http://dx.doi.org/10.3329/ijarit.v9i2.45405.

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Smallholder potato producers in Jeldu district produce potato for both home consumption and market. Adoption of improved varieties is suggested to improve and diversify farmers’ household income. This study intents to identify factors determining adoption and intensity of adoption of improved potato varieties in Jeldu district of West Shewa zone, Oromia region, Ethiopia. Both primary and secondary data were used. The primary data were collected from 140 sample households’ selected using two-stage random sampling techniques. Descriptive statics and double hurdle econometric model were used to a

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34

Morales, Alfredo, Peiyong Ma, Zhaodong Jia, et al. "Evolution of Sweet Potato (Ipomoea batatas [L.] Lam.) Breeding in Cuba." Plants 14, no. 13 (2025): 1911. https://doi.org/10.3390/plants14131911.

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This study analyzed the genetic progress of sweet potato (Ipomoea batatas) breeding in Cuba over the past 50 years by field trials comparing traditional and improved varieties. Improved varieties significantly outperformed traditional ones in tuberous root yield, with an accumulated genetic gain of 0.20–0.37 t ha−1 per year, translating to a 256% yield increase. Improved genotypes also exhibited enhanced pest tolerance: lower weevil (Cylas formicarius) infestation and reduced nematode (Meloidogyne incognita) reproduction rates. For viral diseases, 60% of improved varieties showed incidence rat

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35

Roy, J. K., and K. Prasad. "Three New High Yielding Rice Varieties." International Rice Research Newsletter 11, no. 3 (1986): 5. https://doi.org/10.5281/zenodo.7121718.

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This article 'Three New High Yielding Rice Varieties' appeared in the International Rice Research Newsletter series, created by the International Rice Research Institute (IRRI). The primary objective of this publication was to expedite communication among scientists concerned with the development of improved technology for rice and for rice based cropping systems. This publication will report what scientists are doing to increase the production of rice in as much as this crop feeds the most densely populated and land scarce nations in the world.

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36

Li, Pi Jun, Aijier A. Bula, Wen Yue Wang, and Rui Qi Jia. "Improved Variety Populus Alba×Populus Bolleana and its Parents Growth Characteristic." Advanced Materials Research 853 (December 2013): 384–88. http://dx.doi.org/10.4028/www.scientific.net/amr.853.384.

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Studied on improved varieties and its parents growth characteristics. Discusses the Populus fine varieties Populus alba×Populus bolleana with its parents differences to promote varieties of Populus to provide a theoretical basis for Populus alba×Populus bolleana .The results showed:(1) Comparison of 3 varieties height accumulative increment consistent, individual difference were not significant. (2) 3 poplar varieties cumulative growth of DBH have difference, xinjiang Poplar DBH growth in the 2-8 years was slow , while the Populus alba Linn. and Populus alba×Populus bolleana continued to grow.

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37

Kolapo, A., OV Ogunyemi, OM Ologundudu, IA Adekunle, MO Akinloye, and F. Komolehin. "Farmers’ choice of varieties and demand for improved cassava stems in Nigeria." International Journal of Agricultural Research, Innovation and Technology 11, no. 2 (2022): 42–51. http://dx.doi.org/10.3329/ijarit.v11i2.57254.

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In this study, we used a household level survey to assess choices of varieties and demand for improved cassava varieties. A multivariate probit model was used to examine the determinants of choice decisions of the farmers for different varieties preventing potential endogeneity and measurement error. A Linearized Almost Ideal Demand System (LA/AIDS) model was used to analyze the demand system for improved cassava varieties. The results of the (LA/AIDS) model indicated farmers were very price sensitive to changes in improved stem prices and incomes. We suggest that intervention program that wil

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Kidudu, Joshua S., Dismas L. Mwaseba, and Susan Nchimbi-Msolla. "SMALLHOLDER FARMERS' ATTITUDE TOWARD QUALITY SEED OF IMPROVED COMMON BEAN VARIETIES IN TANZANIA." International Journal of Research -GRANTHAALAYAH 7, no. 5 (2019): 71–80. http://dx.doi.org/10.29121/granthaalayah.v7.i5.2019.826.

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The importance of quality seed of improved varieties is well recognized and widely documented. However, smallholder farmers’ demand for quality seed of improved varieties has remained low for years. Previous studies have broadly identified technological, economic, institutional and human specific factors as major determinants of adoption. However, these studies tended to pay little attention on the influence of smallholder farmers’ attitude on decision to use quality seed of improved common bean varieties. Therefore, using cross-sectional research design, a survey was conducted in major region

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Joshua, S. Kidudu, L. Mwaseba Dismas, and Nchimbi-Msolla Susan. "SMALLHOLDER FARMERS' ATTITUDE TOWARD QUALITY SEED OF IMPROVED COMMON BEAN VARIETIES IN TANZANIA." International Journal of Research - Granthaalayah 7, no. 5 (2019): 71–80. https://doi.org/10.5281/zenodo.3234700.

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The importance of quality seed of improved varieties is well recognized and widely documented. However, smallholder farmers’ demand for quality seed of improved varieties has remained low for years. Previous studies have broadly identified technological, economic, institutional and human specific factors as major determinants of adoption. However, these studies tended to pay little attention on the influence of smallholder farmers’ attitude on decision to use quality seed of improved common bean varieties. Therefore, using cross-sectional research design, a survey was conducted in

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Amadou, K. dit Amobo WAÏGALO, and SISSOKO Kalifa. "Analysis of the Economic Profitability and Determinants of The Adoption of Improved Cowpea Varieties Korobalen IT89KD374 in the Segou Region." Journal of Economics, Finance And Management Studies 07, no. 10 (2024): 6404–13. https://doi.org/10.5281/zenodo.13995458.

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This study focuses on the adoption of improved cowpea varieties Korabalen. It involved 81 producers in the Commune of Sakoïba chosen randomly, more precisely those from the village of Zogofina. The data collected are both qualitative and quantitative. The econometric estimation for the analysis and interpretation of the data was done by Stata software. The study revealed that the adoption rate of the improved cowpea variety Korobalen is 14.81%. Non-adopters have a higher economic profitability than adopters. The adoption rate and economic profitability indicate that producers benefit more

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Wang, Xin, Yanping Song, and Wei Huang. "Public Agricultural Extension, Pest and Disease Experience, and Adoption of Improved Wheat Varieties." German Journal of Agricultural Economics 72, Number 3/4 (2023): 137–53. http://dx.doi.org/10.30430/gjae.2023.0350.

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Improved varieties are considered critical for increasing crop yields worldwide. This study explored the effects of public agricultural extension and pest and disease experience on adoption of improved varieties using survey data on 525 wheat farmers in Anhui Province, China, to which the Heckman sample selection model was applied. The results showed that public agricultural extension had a significant positive relationship with adoption of improved varieties. Demonstration and training, as different forms of agricultural extension, both increased the probability of farmers adopting improved v

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CURIEL-MACIEL, Nidya F., Jesús G. ARREOLA-ÁVILA, Juan R. ESPARZA-RIVERA, et al. "Nutritional quality, fatty acids content and antioxidant capacity of pecan nut fruits from Criolla and Improved walnut varieties." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 49, no. 2 (2021): 12021. http://dx.doi.org/10.15835/nbha49212021.

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In the current study were evaluated the nutrimental quality, fatty acid and mineral content, and antioxidant capacity of pecan nut of Criolla and Improved walnut varieties. Nut fruit samples of three Criolla walnut varieties (‘Nazas I’, ‘Nazas II’ and ‘Norteña’), and two Improved varieties (‘Western’ and ‘Wichita’) were collected in La Laguna (Nazas, Durango) in Northern Mexico. The analyses run in nut samples were: bromatological and mineral content, fatty acids profile and antioxidant capacity. The results showed that Criolla and Improved varieties had similar bromatological content except ‘

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Gemechu, Bekele, and Amha Besufekad. "Evaluation of Improved Tef [Eragrostisteff /Zucc./Trotter] Production Technologies in Central High Lands of Ethiopia." Engineering International 7, no. 1 (2019): 19–30. http://dx.doi.org/10.18034/ei.v7i1.453.

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A study was carried out to evaluate the performance of improved varieties of tef and production technologies in Becho district of Oromia, Centeral Ethiopia. Five improved tef varieties along with the local were selected and used as treatments (that is, Dega tef (T1), Guduru (T2), Kena (T3), Kora(T4),Quncho(T5) and Local (T6)) arranged in a Randomized Complete Block Design (RCBD) with six replications using six farmers’ fields. Yield and yield related parameters were analyzed using SAS statistical software version 9.0. Economic analysis/profitability, preference/acceptability, gender and nutrit

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Gamboa, Cindybell, Goedele Van den Broeck, and Miet Maertens. "Smallholders’ Preferences for Improved Quinoa Varieties in the Peruvian Andes." Sustainability 10, no. 10 (2018): 3735. http://dx.doi.org/10.3390/su10103735.

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Due to an increase in international demand, quinoa production has boomed tremendously in the Andes since the early 2010s. This has led to significant investments into developing improved varieties for large-scale agribusinesses, but breeding programs are not tailored to the needs of smallholders. In this paper, we study farmers’ preferences and willingness to pay for improved quinoa varieties in the Junín region in Peru. We use data from a choice experiment among 458 smallholders and estimate generalized multinomial logit models to control for preference and scale heterogeneity. We find that f

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Bhatt, Prashant, Pratibha Bist, and Laxmi Narayan Ojha. "Farmers' Preferences of Improved Wheat Varieties in Wheat Subsector Kailali, Nepal." International Journal of Applied Sciences and Biotechnology 8, no. 4 (2020): 432–36. http://dx.doi.org/10.3126/ijasbt.v8i4.33671.

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Kailali is the second highest district regarding wheat production and area coverage. A study was carried out in the Kailali district for preference of farmers on different wheat varieties that were being cultivated in the district. The objective of the study was to assess farmers’ preference and perception on the different improved wheat varieties in the area. Five commonly grown wheat varieties and seventeen important wheat varietal traits were selected through focus group discussion, key informant interview and preliminary survey. Sixty households were selected for face-to-face personal inte

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Rabé, Mahamane Moctar, Ibrahim B. Baoua, and Dieudonne Baributsa. "Farmers’ Preferred Genotype Traits and Socio-Economic Factors Influencing the Adoption of Improved Cowpea Varieties in South-Central Niger." Agronomy 12, no. 11 (2022): 2668. http://dx.doi.org/10.3390/agronomy12112668.

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Cowpea, Vigna unguiculata (L.) (Walpers, 1842), is an important legume for food and nutrition security, and income generation. Despite decade-long efforts to disseminate improved varieties, cowpea productivity remains low in Niger. This is due, in part, to the limited adoption of improved cowpea varieties among farmers. Increasing the adoption of improved cowpea varieties requires a better understanding of farmers’ preferred genotype traits and socio-economic factors that influence their decision. We interviewed 634 farmers from the south-central regions (Maradi and Zinder) of Niger to assess

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Rajagopal, Duff, and Hall. "Brassica Biofumigants for Improved Soil Health." Proceedings 36, no. 1 (2020): 77. http://dx.doi.org/10.3390/proceedings2019036077.

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Biofumigation involves growing specialised cover crops that have the ability to suppress certain soil-borne diseases. Species such as those in the Brassicaceae family, (e.g., radish, mustard and rocket) are known to have this capability. Biofumigation activity is initiated by the degradation of glucosinolates within the tissues of the plant when the crop is incorporated into the soil at approx. 25% flowering rate. In this experiment, nine bio-fumigant varieties were assessed over six planting dates for biomass yield, irrigation management, glucosinolate concentration and efficacy against three

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Ega, L. A., A. F. Olatunde, and C. C. Nwasike. "Acceptability of Improved Varieties of Sorghum for Consumption in Northern Nigeria." Food and Nutrition Bulletin 14, no. 4 (1992): 1–5. http://dx.doi.org/10.1177/156482659201400405.

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Farmers’ acceptance of and preference for crop varieties depend to a large extent on consumption value and market price. Therefore, food quality considerations are crucial for extension of high-yield varieties. We explored whether several new sorghum of varieties that have been found to have high agronomic performance are acceptable for consumption by using them in two foods commonly prepared from sorghum (kamu and tango). All the improved varieties made acceptable kamu and tango. They met the expectations of consumers for colour, appearance, flavour, taste, and texture and did nor pose obviou

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Wang, Huaiyu, Sushil Pandey, and Lu Feng. "Econometric Analyses of Adoption and Household-Level Impacts of Improved Rice Varieties in the Uplands of Yunnan, China." Sustainability 12, no. 17 (2020): 6873. http://dx.doi.org/10.3390/su12176873.

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Higher-yielding rice varieties adapted to the upland conditions of Yunnan were developed and disseminated during the late 1990s. Using cross-sectional farm-level data of 448 households collected from five prefectures in Southern Yunnan, this paper carries out an econometric analysis of the determinants of variations in the adoption of improved varieties among households and assesses the impact of adoption on rice income and total household income. The two major determinants of adoption were found to be the government programs for extension of improved upland rice varieties and for terracing of

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JALLETA, TERIESSA. "PARTICIPATORY EVALUATION OF THE PERFORMANCE OF SOME IMPROVED BREAD WHEAT (TRITICUM AESTIVUM) VARIETIES IN THE JIJIGA PLAINS OF EASTERN ETHIOPIA." Experimental Agriculture 40, no. 1 (2003): 89–97. http://dx.doi.org/10.1017/s0014479703001479.

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Through years of research, the Ethiopian Agricultural Research Organization has recommended a number of improved bread-wheat varieties for production in the different climatic zones, along with accompanying technology packages. In areas such as the Jijiga plains, however, adoption of these varieties by the farmers has been very limited. The principal objective of the study was, therefore, to investigate the reasons why farmers are reluctant to adopt high-yielding improved wheat varieties, and to identify farmers' preferences. An assessment study followed by participatory evaluation of the perf

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