Sensitivity Analysis Of A Growth Simulation For Finishing Lambs,
2023
Massey University, New Zealand
Sensitivity Analysis Of A Growth Simulation For Finishing Lambs, P. C. H. Morel, B. Wildbore, I. M. Brookes, Paul R. Kenyon, R. W. Purchas, S. Ramaswami
IGC Proceedings (1977-2023)
A stochastic lamb growth simulation model with a set of heuristic rules has been developed to evaluate management strategies for a solely pastoral grazing system in New Zealand (Morel et al., 2005). In the present paper the results of a sensitivity analysis for this model are presented.
A Model To Evaluate Buying And Selling Policies For Growing Lambs On Pasture,
2023
Massey University, New Zealand
A Model To Evaluate Buying And Selling Policies For Growing Lambs On Pasture, P. C. H. Morel, B. Wildbore, I. M. Brookes, Paul R. Kenyon, R. W. Purchas, S. Ramaswami
IGC Proceedings (1977-2023)
In pastoral sheep finishing systems, farmers aim to maximize profitability by deciding on when and how many animals to buy and/or sell, while taking into account feed availability and current prices. This paper describes a stochastic lamb growth simulation model with a set of heuristic rules, which has been developed to financially evaluate different management strategies for growing lambs on pasture.
Canasta - Crop Niche Selection For Tropical Agriculture, A Spatial Decision Support System,
2023
CIAT, Colombia
Canasta - Crop Niche Selection For Tropical Agriculture, A Spatial Decision Support System, R. O'Brien, M. Peters, R. Corner, S. Cook
IGC Proceedings (1977-2023)
Farmers in the developing world frequently find themselves in uncertain and risky environments, often having to make decisions based on very little information. Risks for smallholder farmers are often critical because of their poverty. In addition, in the tropics and subtropics, the natural environment is spatially and temporally variable and often harsh, thereby increasing the uncertainty faced by these farmers. This research aims to improve forage adoption decisions in the developing world, thereby increasing sustainable intensification and ultimately contributing to increased sustainable world food production and the alleviation of under-nutrition.
An Internet-Based Tool For Use In Assessing The Likely Effect Of Intensification On Losses Of Nitrogen To The Environment,
2023
Danish Institute of Agricultural Sciences, Denmark
An Internet-Based Tool For Use In Assessing The Likely Effect Of Intensification On Losses Of Nitrogen To The Environment, N. J. Hutchings, B. M. Petersen, I. S. Kristensen, N. Detlefsen, M. S. Jørgensen
IGC Proceedings (1977-2023)
The EU Nitrates, Habitat and National Emissions Ceilings directives and the Kyoto Agreement mean that agricultural losses of NO3, NH3 and N2O are under scrutiny by national and international environmental authorities. When farmers wish to intensify their operations, the authorities must then assess the likely environmental impact of the change in operation. The FARM-N internet tool was developed to help farmers and authorities agree how the farm will be structured and managed in the future, and to provide an objective assessment of the environmental losses that will result.
Software Ppbb_Mx: Potential Productivity Modelling Of Brachiaria Brizantha (Cultivars Marandu And Xaraés),
2023
University of São Paulo, Brazil
Software Ppbb_Mx: Potential Productivity Modelling Of Brachiaria Brizantha (Cultivars Marandu And Xaraés), E. R. Detomini, D. Dourado Neto
IGC Proceedings (1977-2023)
Recent improvements in computer capacity and technology allow models to be built to simulate the attributes of many agricultural processes and systems. Although Brachiaria brizantha is the most cultivated tropical grass species in Brazil, there is no single tool to predict its production under optimal conditions. The objective of this paper is to present PPBB_MX software to calibrate and simulate (using a stochastical procedure) the shoot and total biomass potential productivity (output variables) of Brachiaria brizantha as a function of the following input variables: local latitude, season (from cutting date - Julian day), length of regrowth (time, days) and climate …
N-Mineralisation And Phosphorous: Important Elements In Decision Support For Grassland Systems,
2023
Agro Business Park, Denmark
N-Mineralisation And Phosphorous: Important Elements In Decision Support For Grassland Systems, A. Lisbeth Nielsen, C. C. Hoffmann
IGC Proceedings (1977-2023)
Leaching of N and P from extensively managed grasslands on organic soils varies considerably. In environmentally sensitive areas it is important to diminish leaching by appropriate agricultural management. In Denmark low grazing intensity and management without fertilisation have been given a high priority. The type of soil has not been equally in focus, and it seems that the effect of cutting, compared to grazing, resulting in a higher removal of nutrients (e.g. Benke et al., 1992) can be used more strategically. The objective of this case study was to combine data from management strategies with data from leaching examinations …
Artturi Assists Finnish Advisers And Farmers To Succeed In Grass-Based Dairy Production,
2023
MTT Agrifood Research, Finland
Artturi Assists Finnish Advisers And Farmers To Succeed In Grass-Based Dairy Production, Marketta Rinne, Pekka Huhtanen, Kaisa Kuoppala, H. Nikander, J. Nousiainen, M. Hellämäki, L. Nyholm, J. Helminen, K. Lampinen, M. Maisi, M. Korhonen
IGC Proceedings (1977-2023)
Artturi is a collective name for a wide range of services. It is a common tool for different bodies who share an interest in strengthening grass-based dairy production in Finland: research, advisory service and industries. The Service is named after A. I. (Artturi Ilmari) Virtanen, the Finnish scientist who was awarded the Nobel prize in 1945, partly based on his work in developing the ensiling process of grass. The Artturi web site is available in Internet at: http://www.agronet.fi/artturi. Access to Artturi Services is free and no registration is required. The language used is Finnish. During summer 2003, 15,000 visits were …
Involvement Of Maasai Pastoralists In Participatory Rangeland Management Planning And Implementation,
2023
Kenya Forestry Research Institute, Kenya
Involvement Of Maasai Pastoralists In Participatory Rangeland Management Planning And Implementation, Evelyne Kiptot, W, Ego, D. Ochieng, A. Mohamed
IGC Proceedings (1977-2023)
The pastoral Maasai lifestyle was and still is traditionally based on subsistence dairy and meat production. But with population increase, the rangelands can no longer sustainably support livestock production systems. Most of the rangelands which are used for grazing have been subdivided and partially cleared to pave way for cultivation, because of increased population pressure (Ego et al., 1999). This has led to a tendency to overgraze, thus impacting negatively on secondary production from the range. In order to effectively reverse this trend, the users of the rangeland resources were brought together to analyse constraints and opportunities for sustainable …
Management Of Pasture Quality For Sheep On New Zealand Hill Country,
2023
Massey University, New Zealand
Management Of Pasture Quality For Sheep On New Zealand Hill Country, D. I. Gray, J. I. Reid, P. D. Kemp, I. M. Brookes, D. Horne, Paul R. Kenyon, C. Matthew, S. T. Morris, I. Valentine
IGC Proceedings (1977-2023)
The control of pasture quality over spring is central to the achievement of high levels of sheep performance on hill country. Despite this, with the exception of the work of Lambert et al. (2000), little is known about how farmers actually manage pasture quality. The purpose of this research was to describe how a high performing hill country farmer manages pasture quality on their sheep area over spring and from this develop a framework that will assist other farmers improve their pasture management.
Decision Support System For Grassland-Based Sheep Production In The Chilean Patagonia,
2023
Pontificia Universidad Católica de Chile, Chile
Decision Support System For Grassland-Based Sheep Production In The Chilean Patagonia, R. R. Vera, S. Morales, C. Aguilar
IGC Proceedings (1977-2023)
Temporal decision-making in sheep production systems of the Chilean Patagonia is influenced by forage availability in existing paddocks, which in turn is determined by previous use, localisation, climate and soil. Also, production strategies are evolving, with a trend towards fat lamb production, introduction of new breeds and a reduction in the importance of wool production. The objective of this study was to develop an initial version of a spatial empirical simulation model based on extremely limited information, to predict forage growth and sheep production so that decision-makers can assess alternative production strategies.
Accelerating The Impacts Of Participatory Research And Extension: Lessons From Laos,
2023
Charles Sturt University, Australia
Accelerating The Impacts Of Participatory Research And Extension: Lessons From Laos, Joanne E. Miller, Viengxay Photakoun, J. G. Connell
IGC Proceedings (1977-2023)
The role of participatory research and extension in stimulating farmer uptake and adaptation of beneficial technologies has been demonstrated over the last two decades in both developed and developing countries. The challenge is to move beyond simply trialling new technologies with farmers on a small scale to enabling significant livelihood impacts across larger numbers of households, villages and districts. This paper presents results of a project in Lao PDR exploring ways to accelerate and spread localised impacts in complex upland farming systems.
A Decision Support System For Monitoring Livestock Diet Quality And Performance: Verification Study On Cattle, Adami Tulu, Ethiopia,
2023
Texas A&M University
A Decision Support System For Monitoring Livestock Diet Quality And Performance: Verification Study On Cattle, Adami Tulu, Ethiopia, A. A. Jama, G. Tolleson, J. W. Stuth, Abule Ebro, K. Zander, Robert J. Kaitho
IGC Proceedings (1977-2023)
Fecal profiling technology based on near infrared spectroscopy (NIRS) has been widely used in the U.S. to predict the diet quality and performance of free-ranging animals (e.g. Leite & Stuth 1995, Lyons & Stuth 1992, Lyons et al., 1993, Stuth et al., 1999, Tolleson et al., 2001). This technology is linked with the Nutritional Balance Analyzer (NUTBAL-PRO) model to form the core of a nutritional advisory system for livestock producers in the United States. This model predicts changes in body weight and condition for a broad range of livestock classes for cattle, sheep and goats. To test …
Irish Grassland Association: Delivering The Benefits From Grassland,
2023
Teagasc, Ireland
Irish Grassland Association: Delivering The Benefits From Grassland, S. Flanagan
IGC Proceedings (1977-2023)
The Irish Grassland Association (IGA) is Ireland's leading forum for discussing the science of grass and animal production, the economics and finances of dairy, beef cattle and sheep farm enterprises. Membership is 800 and is a lively mix of progressive farmers (70%), research scientists, advisers and agribusiness personnel. The IGA is a member of the European Grassland Federation and has close ties with the Ulster Grassland Society, Fermanagh Grassland Club and the British Grassland Society.
The Role Of The British Grassland Society In Technology Transfer,
2023
University of Reading, UK
The Role Of The British Grassland Society In Technology Transfer, J. M. Crichton
IGC Proceedings (1977-2023)
Since its formation in 1945, the British Grassland Society (BGS) has been active in disseminating information to the grassland and associated sectors of agriculture and has adapted to a change from production-based agriculture to its current output mix of private and public goods. The BGS has as its remit: (a) improved production and utilisation of grass and forage crops for the promotion of agriculture and the public benefit, and (b) the advancement of education and research in grass and forage crop production and utilisation, and the publication of results.
Testing Of Resistance To Downy Mildew On Several Sweet Corn Inbred Lines Of 7th Generation,
2023
Faculty of Agriculture, Universitas Wahid Hasyim
Testing Of Resistance To Downy Mildew On Several Sweet Corn Inbred Lines Of 7th Generation, Heri Kustanto
Jurnal Kultivasi
Sweet corn is one of the most well-known horticultural crop commodities and can adapt to various climates and environments. Efforts to control downy mildew disease continue to be carried out in collaboration with various parties in different ways, including genetic improvement of the varieties planted. The purpose of this study was to test the resistance of the 7th generation of sweet corn inbred lines to downy mildew and to find out the phenotypic characters that affect downy mildew. The new inbred lines obtained from the results of a long breeding process will be better tested for resistance to downy mildew …
Development And Use Of A Detached Leaf Assay To Assess Soybean Cultivar Resistance To Target Spot, Caused By Corynespora Cassiicola,
2023
University of Arkansas, Fayetteville
Development And Use Of A Detached Leaf Assay To Assess Soybean Cultivar Resistance To Target Spot, Caused By Corynespora Cassiicola, Rachael Wolf
Graduate Theses and Dissertations
Target spot, caused by the fungus Corynespora cassiicola, was once considered a minor foliar disease of soybean in the US. However, a severe outbreak of target spot occurred in the southeastern U.S in 2016. Due to the lack of information on resistance in soybean cultivars, and the challenges in screening cultivars in the field, a detached leaf assay was developed to evaluate resistance. The objectives of the effort were to 1) develop a greenhouse inoculation method of soybean with C. cassiicola 2) use that method to compare reactions of soybean germplasm lines to target spot 3) collect and characterize isolates …
Screening For Dmi And Mbc Fungicide Resistance In Monilinia Fructicola And Evaluation Of Biorational Products For Control Of Brown Rot On Peach In The Southeast United States,
2023
Clemson University
Screening For Dmi And Mbc Fungicide Resistance In Monilinia Fructicola And Evaluation Of Biorational Products For Control Of Brown Rot On Peach In The Southeast United States, William Gura
All Theses
Monilinia fructicola (G. Winter) Honey is a fungal pathogen and is the causal agent of blossom blight, twig blight, green fruit rot, preharvest brown rot, and postharvest brown rot of peach (Prunus persica (L.) Batsch). Especially pre-and postharvest brown rot can have devastating economic impacts and negatively effects yield for peach growers throughout the southeastern United States. The most effective method for the control of pre- and postharvest brown rot is the application of synthetic fungicides during preharvest season. However, the consecutive use of fungicides with the same mode of action potentially give rise to resistance. This thesis focuses …
Use Of Biorational Products For Botrytis Management In Floriculture Crops,
2023
Clemson University
Use Of Biorational Products For Botrytis Management In Floriculture Crops, Josselyn Calidonio
All Theses
Botrytis cinerea is an important pathogen that has a significant economic impact on the floriculture industry from propagation to the postharvest environment. Chemical fungicide applications have been one of the main approaches that growers use for botrytis blight management; however, studies have shown that the indiscriminative use of these chemicals leads to fungicide resistance (Brent and Hollomon, 1998; Fillinger and Elad 2016). This thesis explores the potential use of biorational products for botrytis blight management. Biorationals are defined as compounds that have low or no direct mammalian toxicity and few effects on the environment (Paulitz and Belanger 2001). A review …
Fungal Plant Pathogens Affecting Crops In The Lower Rio Grande Valley,
2023
The University of Texas Rio Grande Valley
Fungal Plant Pathogens Affecting Crops In The Lower Rio Grande Valley, Isabel Martinez
Theses and Dissertations
The Lower Rio Grande Valley (LRGV) located in South Texas has a subtropical and humid environment which is conducive for plant disease. In Chapter 1, Southern blight caused by Athelia rolfsii was collected from Edinburg, Texas in tomato and bean crops. The present study focused on assessing the role of temperature on growth and sclerotia production. We found that there is an optimal growing temperature for both hyphal growth and sclerotia production. In Chapter 2, red rot fungal disease was collected from sugarcane in Texas. Morphology, pathogenicity, effects of temperature, and biocontrol agents were assessed. Isolate morphology closely resembled Fusarium …
Evaluating The Effect Of Biochar Soil Amendments On Belonolaimus Longicaudatus Populations Damaging Bermudagrass In South Carolina,
2023
Clemson University
Evaluating The Effect Of Biochar Soil Amendments On Belonolaimus Longicaudatus Populations Damaging Bermudagrass In South Carolina, Malone Thomason
All Theses
Belonolaimus longicaudatus Rau, (1958) (sting nematode) is a prevalent plant-parasitic nematode found in association with Cynodon spp. (bermudagrass) in South Carolina (Ye et al., 2012). Due to the persistence of the pest, long-term management strategies are necessary. Applications of biochar and compost amendments have reduced nematodes in various crop systems, but research on turfgrass systems is limited. The objectives of the studies were to determine: (1) The effect of topdressing or soil incorporated biochar amendments on sting nematode populations, and (2) The effect of topdressing or soil incorporated amendments on turf quality. A field study was established to examine topdressings …
