Assessment of the major yield limiting constraints of barley (Hordeum vulgare) in the Western Hills of Nepal.. by K. D. Subedi

Cover of: Assessment of the major yield limiting constraints of barley (Hordeum vulgare) in the Western Hills of Nepal.. | K. D. Subedi

Published by Lumle Regional Agricultural Research Centre in Pokhara .

Written in English

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SeriesNepal, Lumle Regional Agricultural Research Centre Working Paper -- 95/50.
ContributionsLumle Regional Agricultural Research Centre.
The Physical Object
Paginationiii,11p.p.
Number of Pages11
ID Numbers
Open LibraryOL17228370M

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On-farm assessment of constraints to wheat yield in the south-eastern Pampas Article in Field Crops Research 74(1) February with 53 Reads How we measure 'reads'. Global yields of major crops are analysed using climate, irrigation and new nutrient data to show that large production increases are possible from closing yield gaps to % of Cited by: The attainable yield for the five yield-limiting factors ranged from kg ha⁻¹ (EP) to kg ha⁻¹ (AT-0).

Farmers (Yfarm) and local agronomists (Yexp) have achieved 63% and 86% of the. A tool to calculate the potential yield of your wheat crop over a number of seasons.

The wheat yield constraint calculator enables you to compare this with your actual yield to identify if your crop is consistently reaching its potential. Use this information to identify if a constraint may be limiting your production potential. You simply select a weather station located closest to your.

Cereal Production documents the proceedings of the Second International Summer School in Agriculture held by the Royal Dublin Society in July This book relates individual disciplines to the central concept in cereal production, which is the optimization of yield and quality and maximization of net return.

c The average annual yield change in terms of percentage is given relative to the first year of the selected period, that is, the average growth rate is expressed as a percentage of the estimated yield in the first year of selected period (e.g., from –, the average annual growth of corn yield in Brazil was % of the yield level in Cited by: FIELD CROPS RESEARCH.

The field crops research program at Holeta comprised of sixresearch commodities, i.e., barley (food and malt),bread wheat, Tef, highland maize, highland pulses (faba bean and field pea) and high and midland oil crops (linseed, oilseed, brassica, noug, sunflower and safflower).The various research activities of each commodityare handled by a multi-disciplinary team.

Grain yield is affected worldwide by abiotic constraints such as drought and heat stress (Lobell et al., ).In the field, these abiotic stresses are likely to occur simultaneously (Barnabás et al., ), at the regional scale because of the coincidence of sunny, warm, and dry weather and at the micrometeorological level due to the balance of stomatal closure in response to heat and Cited by: 9.

At least 16 nutrient elements are required by plants, 5 but most studies dealing with crop nutrition focus on N and phosphorus (P) because these elements are regarded as the most important in limiting crop growth and production.

2., 3. Different approaches have been applied to investigate, evaluate, and improve the nutrient use efficiency (NUE) of plants, depending on the purpose to which the Cited by: 5.

The major crops grown by farmers in the high altitude zone are barley, wheat, field pea, and faba bean while tef, wheat and chickpea are the main crops grown in the medium altitude zone. Maize and sorghum are the dominant crops grown in the low altitude zone. Barley constituted the largest share of crop residue fed to livestock (Table 7).

The major outcomes of the pre-extension activities have been to link the research Assessment of the major yield limiting constraints of barley book extension by demonstrating and popularizing newly developed Assessment of the major yield limiting constraints of barley book technologies, which are mainly centred on released varieties, and also by providing feedback to researchers by assessing farmer responses and studying the constraints influencing the transfer.

Seid Ahmed Kemal is a member of ICARDA’s legume breeding team which develops high yielding and disease-resistant food legumes. He also researches the epidemiology of food legume diseases and supervises graduate students. Seid Ahmed Kemal has a Ph.D. in biology from the University of Saskatchewan, Canada, and a in crop protection from Haramaya University, Ethiopia.

Global Agro-ecological Assessment for Agriculture Plate C3 Suitability for rain-fed barley Plate C4 Suitability for rain-fed cassava Agro-climatic constraints yield reduction factors for winter wheat. 46 The application of Fluvisol suitability ratings and soil unit suitability.

Free Online Library: Impact of subsoil physicochemical constraints on crops grown in the Wimmera and Mallee is reduced during dry seasonal conditions.(Report) by "Australian Journal of Soil Research"; Agricultural industry Earth sciences Growth Beans Crop yields Cropping systems Legumes Mimosaceae Precipitation variability Rain Rain and rainfall Salinity Soil chemistry Soil moisture.

Several of these constraints may occur together in some soils, making diagnosis of the most limiting soil property difficult. Moreover, several soil characteristics in topsoil (A-horizon, m) and subsoil (B-horizon, below m) layers may interact to determine the edaphic environment upon which plant roots depend at a given time.

Major recommendations from the project outcomes and outputs are: Identify the most limiting subsoil constraint as a first step. If a paddock or parts of a paddock show poor crop growth and yield, despite good soil moisture at sowing, nutrition and adequate in-crop rainfall, check for the following: diseases, insect pests, nematodes, herbicide damage, weeds or frost damage.

Wheat and barley are the two major cool season cereal crops. Wheat provides about 20% of the calories consumed by mankind, whereas barely is used primarily for animal feed and the beer industry. Drought is the major environmental factor limiting wheat production worldwide.

Developing novel cultivars with greater drought tolerance is the. Methodology. This study builds on previous work (including Dixon et al., and Hyman et al., ), but with a focus on the 12 principal commodities and farming systems of main framework for the study is John Dixon’s farming systems framework, a global delineation and resulting map of the major farming systems of the developing world (Dixon et al., ).Cited by: 3.

Impacted soils are a major limiting production factor worldwide for every major crop (Bacilio et al., ; Shannon and Grieve, ). A significant increase (an estimated 50%) in grain yields of major crop plants such as rice (Oryza sativa L.), wheat (Triticum aestivum L.) and maize (Zea mays L.) is required to fulfill the food supply Cited by: Microbial infections of crop plants present an ongoing threat to agricultural production.

However, in recent years, we have developed a more nuanced understanding of the ecological role of microbes and how they interact with plants. This includes an appreciation of the influence of crop physiology and environmental conditions on the expression of disease symptoms, the importance of non Cited by: 4.

constraints including land and local consumption constraint. The results revealed that when water and land constraints are applied (Scenario 2), wheat and barley are eliminated from the planting pattern, but other crops gain more planting area.

Under the application of all constraints. Within EU, the lowest per hectare barley grain yield is obtained in Cyprus with the value of t/ha, the country with the highest per hectare barley grain yield is Belgium with yield of t/ha. Table Barley yield difference between EU, Ukraine, Russia and Belarus.

Yield range Average yield (t/ha) Country low. The review focused on two major areas: (1) physical effects of man- made and natural factors on agricultural crop yield, and (2) methodolo- gies and models used to evaluate and quantify the economic impacts of crop yield changes on the farm, the agricultural industry and finally the consumers.

Assessment of some spatially variable soil factors limiting crop yields (Proceedings International Fertiliser Society No. ) Johnston, A. E., Macdonald, A. J., White, R. and Powlson, D. Major limitations to achieving 4 per increases in soil organic carbon stock in temperate regions: evidence from long-term experiments at Author: A.

Johnston, P. Barraclough, P. Poulton, C. Dawson. section 5: africa impact of climate change on simulated wheat and maize yields in egypt h.m. bid implications of climate change for maize yields in zimbabwe paul muchena section 6: asia implications of global climate change for agriculture in pakistan: impacts on simulated wheat production ata qureshi, and ana iglesias impact of climate change on simulated wheat production in india d.

Mustafa SZ, Yasmin S, and Majid A. Results of the National Uniform Yield Trials. Coordinated Wheat-Barley and Triticale Programme, Pakistan Agricultural Research Council, P.O. BoxIslamabad. Steel RGD and Torrie JH. Principles and Procedures of Statistics.

McGraw Hill Book Company, New York. Bardsir, Bam, and Jiroft) and five crops (wheat, barley, potato, onion, and tomato). Analysis was based on three scenarios: (i) current planting conditions, (ii) profit maximization considering the constraints of required water and land, and (iii) profit maximization considering the constraints including land and local consumption constraint.

Root size and architecture are important crop plant traits, as they determine access to water and soil nutrients. The plant hormone cytokinin is a negative regulator of root growth and branching. Here, we generated transgenic barley (Hordeum vulgare) plants with an enlarged root system by enhancing cytokinin degradation in roots to explore the potential of cytokinin modulations in Cited by: The average yield, cost and return for the maize crop showed significant results due to the proper utilization of the credit by the farmers.

The major constraints to farmers while obtaining credit were complicated procedure of pass book preparation, amount less than requirement, unavailability of timely credit and non-availability of collateral.

A key consideration in managing subsoil constraints is the assessment of the financial viability of different management options, including ‘living with the problem’ (PSG ). A video animation is also available that helps explain the behaviour of sodic soils; one of the major constraints discussed in local management guides.

The effect of drought on barley yield and water use in two contrasting years. Irrigation Science. 8, pp. Retrospective analysis of an archived soil by: multiyear analysis for risk assessment.

On a regional basis it is intended to be useful for yield forecasting and the analysis of various policy questions related to crop production and resource conservation.

These purposes require that the model have the following characteristics: o Use readily available weather, soil, and genetic inputs. Peltonen-Sainio et al.

characterised the coincidence of yield variations with weather variables for major field crops using long-term datasets to reveal whether there are commonalities across the European agricultural regions. Long-term national and/or regional yield datasets were used from 14 European countries for spring and winter barley and Cited by: 1.

Optimum N amounts for both wheat and barley are clearly related to grain yield (Figs 5, 6) but only a portion of this relationship was due to genotype in winter wheat and none was due to genotype in spring barley. For wheat, the association of optimum N with grain yield will also negate the potential for yield improvement to improve NUE Cited by: REGULATING PESTICIDES TABLE An Example ofthe Recommended Format for the Presentation of Benefit Assessment Results Cost of Denying Reregistration to Trifluralin for Use on Cotton (assuming demand elasticity ishorizontal supply curve) Real Costs cuff Dental Decrease in lint production million lb at ( + )/2 Decrease in.

Meta-analysis calculations. In our analysis, we used the mean difference (Eq. ) in yield between the treatment and control because of its ease of interpretation (Ried ).The yield difference is also more relevant when comparing potential gains to required investment and input costs (Sileshi et al.

).To obtain overall treatment effects across studies, the differences between treatment Cited by: Chickpea grain yield in (Figure 2d) had several factors additively increasing yield, similar to the barley in (Figure 2a). Yield in the 0K-0P was higher by kg/ha (11%) than the FR, so the combination of previous deep tillage and basal N, S and/or Zn nutrient was still boosting yield.

Analysis of yield data collected on 12, acres over three years showed corn, soybean, and wheat yield variability was generally severe, widespread, and persistent.

The greatest impact to date is the widespread use of the publicly available software that implements yield data filtering techniques. In China, wheat yield reductions of up to 10 per cent is estimated for 1°C temperature increase during the growing season (You et al., ).

Biotic stresses. The most important biotic constraints which affect wheat production in SSA include diseases, insects and by: 1. In barley, major emphasis has been given on improving the wherein various constraints in wheat and barley production have been identified, which will form the base of future research programme.

At Regional Station • The highest yield gain in barley was recorded in MP ( %) followed by HP (%), Rajasthan ( %), Punjab (.

Dr Rengasamy is a Senior Research Fellow in the School of Agriculture, Food and Wine. He is involved in research activities related to soil salinity, soil sodicity and dispersivity, soil processes affecting crop production in salt-affected soils, abiotic stress in alkaline soils, subsoil constraints and the role of exchangeable cations in soil structural stability.Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.Other major sources of variation include the age of the study (early studies scoping the broad theoretical or upper technical limits are quickly eclipsed by further studies imposing various constraints); nomenclature and classification of biomass and land‐use types; the type of modelling approach; and the assumptions and scenarios (Dornburg Cited by:

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