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Articles 1 - 9 of 9
Full-Text Articles in Life Sciences
Nitrogen Use Efficiency Of Timothy Populations, G Belanger, C Murray, R Michaud, F Gastal, J E. Richards
Nitrogen Use Efficiency Of Timothy Populations, G Belanger, C Murray, R Michaud, F Gastal, J E. Richards
IGC Proceedings (1997-2023)
The objective of this study was to determine the variability in N use efficiency among field-grown timothy (Phelum pratense L.) populations. Shoot biomass and N uptake were measured at the end of the spring growth cycle on six timothy populations fertilized with three N rates at two sites in Eastern Canada. The variability in shoot biomass among populations was similar under limiting and nonlimiting N conditions. The ranking of the populations, however, differed under limiting and non-limiting N conditions, and also between the two sites under limiting N conditions. The differences in shoot biomass among populations under highly N …
Economic Efficiency Of Milk Production For Different Sizes Of Modern Dairy Farms In Hamadan Province, Iran, Yousef Rostami, M. Koopahi, S. A. Mohaddes
Economic Efficiency Of Milk Production For Different Sizes Of Modern Dairy Farms In Hamadan Province, Iran, Yousef Rostami, M. Koopahi, S. A. Mohaddes
IGC Proceedings (1997-2023)
Iran has limited water resources and attention has been focused on selecting agricultural subsectors, such as dairy farming, that maximise economic returns to this limited resource. The study measures the levels of production efficiency of a sample of modern farms located in the Hamadan province of north-west Iran. Though the production levels of modern farms are higher than those of traditional farms, levels of production efficiency are in many cases well below potential resulting in lower profit margins and less investment in dairy farming. This study was concerned with quantifying efficiency in a sample of modern dairy farms.
Chew-Bites, Jaw Movement Allocation And Bite Rate In Grazing Cattle As Identified By Acoustic Monitoring, E. D. Ungar, N. Ravid, T. Zada, E. Ben-Moshe, R. Yonatan, S. Brenner, H. Baram, A. Genizi
Chew-Bites, Jaw Movement Allocation And Bite Rate In Grazing Cattle As Identified By Acoustic Monitoring, E. D. Ungar, N. Ravid, T. Zada, E. Ben-Moshe, R. Yonatan, S. Brenner, H. Baram, A. Genizi
IGC Proceedings (1997-2023)
Bite rate derives from the time budget of the biting and chewing processes of intake, which are both performed by jaw movements. A new type of jaw movement was revealed by acoustic monitoring in cattle - the "chew-bite" -which chews herbage already in the mouth and harvests fresh herbage with the same jaw movement (Laca et al., 1992). Chew-biting should enable the animal to reduce the total number of jaw movements performed per bite without reducing the number of chews per bite. We examined the variation among individuals in the allocation of jaw movements between the three types, and …
Assessment Of Grass Production And Efficiency Of Utilisation On Three Northern Ireland Dairy Farms, A. J. Dale, P. D. Barrett, C. S. Mayne
Assessment Of Grass Production And Efficiency Of Utilisation On Three Northern Ireland Dairy Farms, A. J. Dale, P. D. Barrett, C. S. Mayne
IGC Proceedings (1997-2023)
Recent research has shown that grazed grass can be an expensive forage for milk production, particularly if herbage production is low or utilisation is inefficient. There is very limited data on the level of herbage grown and utilised on commercial farms. The objective of this project was to quantify grass production and efficiency of utilisation on farm to substantiate the potential of grazed grass for profitable milk production.
Environmental Efficiency In Mixed Crop Livestock Farming In India, K. A. C. H. A. Kothalawala, S. Kumar, H. Kothalawala
Environmental Efficiency In Mixed Crop Livestock Farming In India, K. A. C. H. A. Kothalawala, S. Kumar, H. Kothalawala
IGC Proceedings (1997-2023)
No abstract provided.
Modelling Deficit Irrigation Strategies For Dairy Regions Of Australia, Richard P. Rawnsley, Brendan R. Cullen, Lydia R. Turner, Karen Christie
Modelling Deficit Irrigation Strategies For Dairy Regions Of Australia, Richard P. Rawnsley, Brendan R. Cullen, Lydia R. Turner, Karen Christie
IGC Proceedings (1997-2023)
No abstract provided.
Sustainability, Biodiversity And Environmental Issues: A Global Perspective For Livestock Production, David L. Michalk
Sustainability, Biodiversity And Environmental Issues: A Global Perspective For Livestock Production, David L. Michalk
IGC Proceedings (1997-2023)
To meet world food demand through the 21st century, agricultural production needs to increase, but this needs to be done sustainably through increasing efficiency, optimising sufficiency and achieving consistency, such that resource use is optimised, waste reduced and environmental benefits gained. These strategies need to be developed against changing food patterns, especially a decline in per capita consumption of cereals and an increase in meat consumption as household incomes increase. Grasslands are collectively the larger group of land-based ecosystems on the planet. Their values are not always recognised, often being seen as ‘reserves’ for exploitation for urban expansion, …
Evaporation Reduction Potential In An Undisturbed Soil Irrigated With Surface Drip And Sand Tube Irrigation, Masoud Meshkat, Richard C. Warner, Stephen R. Workman
Evaporation Reduction Potential In An Undisturbed Soil Irrigated With Surface Drip And Sand Tube Irrigation, Masoud Meshkat, Richard C. Warner, Stephen R. Workman
Biosystems and Agricultural Engineering Faculty Publications
The efficiency of drip irrigation is highly dependent on evaporation losses occurring from the constantly saturated soil beneath emitters. Advent of subsurface drip irrigation is in part an approach to curb this inefficiency. An irrigation method, Sand Tube Irrigation (STI), is proposed to increase the efficiency of “Normal” surface applied drip Irrigation (NI method) on permanent tree crops without the need for burying the irrigation tubing. The sand tube consists of removing a soil core beneath the emitter and filling the void with coarse sand. A weighing lysimeter was constructed in the laboratory and instrumented to directly measure temporal evaporation …
Comparison Of Water And Temperature Distribution Profiles Under Sand Tube Irrigation, Masoud Meshkat, Richard C. Warner, Stephen R. Workman
Comparison Of Water And Temperature Distribution Profiles Under Sand Tube Irrigation, Masoud Meshkat, Richard C. Warner, Stephen R. Workman
Biosystems and Agricultural Engineering Faculty Publications
Drip irrigation is one of the most efficient systems in delivering water to the plant root zone. Research has shown that the saturated, or nearly saturated, surface beneath the emitter may increase evaporation thereby reducing the irrigation efficiency. To increase the efficiency of surface applied drip irrigation on permanent tree crops a sand tube irrigation (STI) method was developed and tested. The sand tube method consists of removing a soil core beneath the emitter and filling the void with coarse sand. A weighing lysimeter was designed and instrumented to directly measure temporal evaporation during irrigation and for a period of …