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Articles 9241 - 9270 of 12036
Full-Text Articles in Physical Sciences and Mathematics
Grazing Systems For Beef Cattle, John Johns
Grazing Systems For Beef Cattle, John Johns
Kentucky Grazing Conference
Beef cattle represent the most important grazing livestock enterprise to Kentucky producers. As of January 1, 2003 there were 1,120,000 producing beef brood cows on 39,000 farms in the state. In addition, more than 600,000 yearling cattle are also produced. The number of total beef animals is increasing as producers put more economic reliance on beef and forage programs. In many cases, beef cattle represent the only practical method of converting high quality forage to income for producers.
Grazing Systems For Dairy, Donna M. Amaral-Phillips
Grazing Systems For Dairy, Donna M. Amaral-Phillips
Kentucky Grazing Conference
Forages which are grazed can provide anywhere from 25 to 100% of the forage consumed by growing dairy heifers, dry cows or the milking herd. In this paper, I would like to specifically deal with devising a grazing program for a dairy lactating or milking herd. Lactating dairy cows are a “high performance animal” and, as such, any decreases in the availability or quality of forage can quickly decrease milk production. Thus, the goal when designing a grazing system is to provide adequate quantities of high-quality, vegetative forage to prevent decreases in performance. These decreases in performance occur in all …
Opportunities For Warm Season Grasses, Ken Johnson
Opportunities For Warm Season Grasses, Ken Johnson
Kentucky Grazing Conference
Today I would like to do two things, first talk a little about warm season grasses, where they come from, and where they might fit in your grazing program; and second, talk about the four major native grass species and two introduced species.
Native warm season perennial grasses were an important part of the native forage species of Kentucky, supplying food and cover for deer, buffalo, and other wildlife when settlers arrived into Kentucky. With settlers plowing, overgrazing, and the introduction of other forages, Native Warm Season Grasses (NWSGs) were on the brink of extinction. These grasses included switchgrass, eastern …
Optimize Grazing--Minimize Stored Feed, Garry D. Lacefield
Optimize Grazing--Minimize Stored Feed, Garry D. Lacefield
Kentucky Grazing Conference
The title “Optimize Grazing – Minimize Stored Feed” appears to be a bit redundant at first glance. Indeed if we optimize grazing, we will certainly minimize the amount of stored feed required to winter our animals. Putting both concepts together can serve as a reminder of the tremendous benefit of both.
Grazing represents the cheapest source of nutrients for our beef industry. Several studies have shown that the best predictor of profitability in the beef industry is cost of stored feed. In Kentucky, specifically, that means cost/amount of hay required to winter on beef animals.
Foreword And Kfgc Award Winners [2003], Garry D. Lacefield, Christi L. Forsythe
Foreword And Kfgc Award Winners [2003], Garry D. Lacefield, Christi L. Forsythe
Kentucky Grazing Conference
No abstract provided.
Understanding The Mechanisms Of Lead, Copper, And Zinc Retention By Phosphate Rock, R. X. Cao, L. Q. Ma, R. D. Rhue, C. S. Appel
Understanding The Mechanisms Of Lead, Copper, And Zinc Retention By Phosphate Rock, R. X. Cao, L. Q. Ma, R. D. Rhue, C. S. Appel
Earth and Soil Sciences
The solid-liquid interface reaction between phosphate rock (PR) and metals (Pb, Cu, and Zn)was studied. Phosphate rock has the highest affinity for Pb, followed by Cu and Zn, with sorption capacities of 131, 114, and 83.2 mmol kg-1 PR, respectively. In the Pb-Cu-Zn ternary system, competitive metal sorption occurred with sorption capacity reduction of 15.2%, 48.3%, and 75.6% for Pb, Cu, and Zn, respectively. A fractional factorial design showed the interfering effect in the order of Pb>Cu>Zn. Desorption of Cu and Zn was sensitive to pH change, increasing with pH decline, whereas Pb desorption was decreased with a …
Cal Poly's Eswcc Teaches The Next Generation Of Soil Scientists, M. Perry, C. Appel
Cal Poly's Eswcc Teaches The Next Generation Of Soil Scientists, M. Perry, C. Appel
Earth and Soil Sciences
Since 1992, members of Cal Poly San Luis Obispo’s Earth, Soil, and Water Conservation Club (ESWCC), sponsored by the MESA Agricultural Initiative, have volunteered their time and expertise to educate middle-school students in soil science. ESWCC members assemble soil testing kits containing three soils, pH testing materials, and instructions for analyzing soil pore space, water infiltration rates, and soil texture by “feel”. The kits help over 200 California teachers convey the importance of soil science through simple physical and chemical procedures that provide a deeper understanding of soil. ESWCC members train teachers to run classroom experiments and to relate soil …
Groundwater Investigation On Victoria Location 8565, East Binnu, Russell John Speed
Groundwater Investigation On Victoria Location 8565, East Binnu, Russell John Speed
Resource management technical reports
Describes a drilling investigation undertaken for the East Binnu area within Victoria location 8565, Western Australia. Groundwater monitoring bores were installed to assess the risk of dryland salinity developing if after clearance of native vegetation, the area is used to grow annual crops and pastures. The investigation confirmed that the risk of further salinity development in this location is extreme.
Sorption Of Phosphorus By Soils : How It Is Measured In Western Australia, Michael D A Bolland, D G. Allen, N J. Barrow
Sorption Of Phosphorus By Soils : How It Is Measured In Western Australia, Michael D A Bolland, D G. Allen, N J. Barrow
Bulletins 4000 -
Most soils used for agriculture in Western Australia had insufficient indigenous native phosphorus P for the introduced agricultural plant species used in the region so fertiliser P had to be applied. This bulletin covers how water-soluble P WSP fertilisers are made, and how the P in the fertilisers dissolves and reacts with soil in the year of application and in the years after application, how soils sorb P and procedures and soil tests used to estimate the capacity of soils to sorb P.
Moore River : Catchment Appraisal 2003, A Alderman, M Clarke, Natural Heritage Trust (Australia), Moore River Catchment Support Team (Wa)
Moore River : Catchment Appraisal 2003, A Alderman, M Clarke, Natural Heritage Trust (Australia), Moore River Catchment Support Team (Wa)
Resource management technical reports
Using the Rapid Catchment Appraisal process, this report summarises current information for the Moore River catchment, Western Australia. The headwaters of the Moore River commence in Perenjori, Carnamah and Dalwallinu shires and drain southwards through Moora.
Successful Field Pea Harvesting, Glen Riethmuller, Ian Pritchard
Successful Field Pea Harvesting, Glen Riethmuller, Ian Pritchard
Bulletins 4000 -
Many thousands of hectares of field peas are harvested trouble free each year. Growers experience together with recent machinery innovations and modifications have solved the majority of harvesting difficulties. Optimum harvesting conditions are in a crop of uniform density on a level soil surface with the machine either working into or across the direction that the crop has been laid by the wind.
To make harvest easier the receival standard for moisture in pulses has been lifted to 14 per cent, which allows harvest to begin sooner when the crop is the range of 14 to 15 per cent moisture. …
Blackwood Catchment : Beaufort Zone (Zone 4) : Catchment Appraisal 2002, Henry Brockman, Blackwood Rapid Catchment Appraisal Team (Wa ), Natural Heritage Trust (Australia)
Blackwood Catchment : Beaufort Zone (Zone 4) : Catchment Appraisal 2002, Henry Brockman, Blackwood Rapid Catchment Appraisal Team (Wa ), Natural Heritage Trust (Australia)
Resource management technical reports
Using the Rapid Catchment Appraisal process, this report summarises current information for the Beaufort zone, located in the mid to southern part of the Blackwood basin, including parts of the shires of Kojonup, West Arthur, Woodanilling, Katanning, Broomehill, Wagin and Boyup Brook, Western Australia. Assesses the condition of, and future risks to agricultural and natural resources, provides information for reducing those risks and identifies the most suitable options to manage the risk.
Predicting The Effectiveness Of Farm Planning At The Byenup Hill Catchment Using A Groundwater Model, Gregory Paul Raper, L M. Guppy
Predicting The Effectiveness Of Farm Planning At The Byenup Hill Catchment Using A Groundwater Model, Gregory Paul Raper, L M. Guppy
Resource management technical reports
A catchment model was constructed for the Byenup Hill catchment based on detailed hydrogeological mapping, information on land mapping units and land use collected from landholders. The aim of this work was to assess the likely impact of proposed land management changes to soil salinisation and recharge in the Byenup Hill Catchment.
Sheep Updates 2003 - Pastures, Ed Barrett-Lennard, Hayley Norman, Robyn Dynes, David Masters, David Henry, Stephen Gherardi, Graham Donald, Asoka Edirisinghe, Chris Oldham, Richard Smith, Joanne Sneddon, Mike Hyder, Andrew Thompson, Kazue Tanaka, Roy Latta, Chris Matthews, Brad Nutt, Angela Loi, Tim Wiley
Sheep Updates 2003 - Pastures, Ed Barrett-Lennard, Hayley Norman, Robyn Dynes, David Masters, David Henry, Stephen Gherardi, Graham Donald, Asoka Edirisinghe, Chris Oldham, Richard Smith, Joanne Sneddon, Mike Hyder, Andrew Thompson, Kazue Tanaka, Roy Latta, Chris Matthews, Brad Nutt, Angela Loi, Tim Wiley
Sheep Updates
This session covers seven papers from different authors: 1. Pastures for saline land, Ed Barrett-Lennard 1Department of Agriculture, Western Australia, Hayley Norman, Robyn Dynes and David Masters CSIRO Livestock Industries, Centre for Mediterranean Agricultural Research, Floreat Park, 2. Feeding value - the essential link between pastures and animals CSIRO Livestock Industries, Centre for Environmental and Life Sciences 3. ‘Pastures from space’ - how do we do it, how well do we do it and what do producers think about it? Stephen Gherardi Department of Agriculture Western Australia Graham Donald Asoka Edirisinghe Dave Henry CSIRO Livestock Industries Chris Oldham Department of …
East Mortlock : Catchment Appraisal 2002, Don Cummins
East Mortlock : Catchment Appraisal 2002, Don Cummins
Resource management technical reports
This report describes the soils, hydrology, natural vegetation and farming systems of the East Mortlock catchment and provides information on the threats to agriculture, infrastructure and natural resources caused by land degradation. East Mortlock covers over 800,000 hectares in the central wheatbelt. Rapid Catchment Appraisal aims to document salinity risk and management options by addressing all threats to the natural resource base, rather than isolating salinity as a separate issue.
History, Geology And Water In The Lower Platte River Valley In Eastern Nebraska, Dave Gosselin, Marv Carlson, Matt Joeckel
History, Geology And Water In The Lower Platte River Valley In Eastern Nebraska, Dave Gosselin, Marv Carlson, Matt Joeckel
Conservation and Survey Division
No abstract provided.
Analysis Of The Effects Of Hypogeal And Epigeal Emergence On Seedling Competition In Legumes, Keith E. King
Analysis Of The Effects Of Hypogeal And Epigeal Emergence On Seedling Competition In Legumes, Keith E. King
McCabe Thesis Collection
Seedling emergence is either hypogeal or epigeal. In hypogeal emergence the cotyledons remain below the soil surface during seedling development, while in epigeal emergence the cotyledons extend above the soil surface due to elongation of the hypocotyl. Here we examine the effect of seed size, and emergence type, on seedling growth. Six legumes with variation in seed size and either epigeal or hypogeal emergence were grown under dark and light conditions. A competition study was also conducted where a hypogeal and epigeal legume were grown in combination with wheat and ryegrass. Legumes expressing epigeal emergence were cowpea (Vigna unguiculata), mung …
West Mortlock Catchment Appraisal 2002, D G. Cummins
West Mortlock Catchment Appraisal 2002, D G. Cummins
Resource management technical reports
This report describes the soils, hydrology, natural vegetation and farming systems of the West Mortlock catchment and provides information on the threats to agriculture, infrastructure and natural resources caused by land degradation. West Mortlock covers over 700,000 hectares in the central wheatbelt. Rapid Catchment Appraisal aims to document salinity risk and management options by addressing all threats to the natural resource base, rather than isolating salinity as a separate issue.
Assessing Storage Reliability Of Farm Dams, D Farmer, N Coles
Assessing Storage Reliability Of Farm Dams, D Farmer, N Coles
Resource management technical reports
This report provides information on a method to estimate the volume of water in a farm dam and to determine how long this water will last. During periods of low rainfall, dams with farmland catchments receive limited run-off. Alternative water sources or management strategies need to be considered before the water runs out. The methods provided in this report are intended to provide to the landholder an indication of water supply over short periods only (i.e. in the order of 4-20 weeks).
Point Of Zero Charge Determination In Soils And Minerals Via Traditional Methods And Detection Of Electroacoustic Mobility, Chip Appel, Lena Q. Ma, R. Dean Rhue, Elizabeth Kennelley
Point Of Zero Charge Determination In Soils And Minerals Via Traditional Methods And Detection Of Electroacoustic Mobility, Chip Appel, Lena Q. Ma, R. Dean Rhue, Elizabeth Kennelley
Earth and Soil Sciences
Points of zero charge were determined on two highly weathered surface soils from Puerto Rico, an Oxisol and Ultisol, as well as mineral-standard kaolinite and synthetic goethite using three methods: (1) potentiometric titration measuring the adsorption of H+ and OH− on amphoteric surfaces in solutions of varying ionic strength (I) (point of zero salt effect), (2) direct assessment of surface charges via non-specific ion adsorption as a function of pH and I (point of zero net charge), and (3) electroacoustic mobility of reversible particles as it varies with pH and I (isoelectric point). The first two methods yielded points of …
Groundwater Study Of The Goomalling Townsite, Russell John Speed
Groundwater Study Of The Goomalling Townsite, Russell John Speed
Resource management technical reports
A groundwater study was undertaken in the townsite of Goomalling, Western Australia. The study consisted of a drilling program to install a network of groundwater monitoring bores. This report documents background information for the town and its catchment, the hydrogeological investigations, conclusions on the town's salinity risk and recommendations for improved water management.
Water Transfers And Marketing In Nebraska, J Michaeil Jess
Water Transfers And Marketing In Nebraska, J Michaeil Jess
Conservation and Survey Division
No abstract provided.
2003 Changes To Water Transfer Law In Nebraska - Addendum, J Michael Jess
2003 Changes To Water Transfer Law In Nebraska - Addendum, J Michael Jess
Conservation and Survey Division
No abstract provided.
Geology, Groundwater Chemistry And Management Of The Dakota Aquifer In Nebraska, David C. Gosselin, F. Edwin Harvey, Charles A. Flowerday
Geology, Groundwater Chemistry And Management Of The Dakota Aquifer In Nebraska, David C. Gosselin, F. Edwin Harvey, Charles A. Flowerday
Conservation and Survey Division
No abstract provided.
Farm Management Practice For The Prevention Of Soil Erosion In The Canarvon Horticulture Area, David Parr
Farm Management Practice For The Prevention Of Soil Erosion In The Canarvon Horticulture Area, David Parr
Horticulture research reports
Lower Gascoyne Management Strategy
The Carnarvon horticultural area has suffered considerable erosion damage following flooding of the Gascoyne River.
The purpose of this report is to describe the factors that contribute to soil erosion in the Carnarvon horticultural area (Section 1) and provide guidelines for soil management (Sections 2 and 3) which will assist farmers, local government planners and government bodies with responsibility for resource protection and conservation.
The report:
- Provides detailed information on soil management for intensive irrigated cropping
- Details cropping alternatives to better manage the soil erosion risk
- Identifies appropriate plants for soil stabilisation in a range of …
Wayne E. Sabbe Arkansas Soil Fertility Studies 2002, Nathan A. Slaton
Wayne E. Sabbe Arkansas Soil Fertility Studies 2002, Nathan A. Slaton
Arkansas Agricultural Experiment Station Research Series
Rapid technological changes in crop management and production require that the research efforts also be presented in an expeditious manner. The contributions of soil fertility and fertilizers are major production factors in all Arkansas crops. The studies contained within will allow producers to compare their practices with the university’s research efforts. Additionally, soil test data and fertilizer sales are presented to allow comparisons among years, crops, and other areas within Arkansas.
Alfalfa Disease Management, Paul Vincelli
Alfalfa Disease Management, Paul Vincelli
Kentucky Alfalfa and Stored Forage Conference
Alfalfa can be a vigorous and productive forage crop for Kentucky farmers. Like all farm crops, however, alfalfa is subject to infectious diseases that can limit forage production. Managing these diseases is an important part of economical alfalfa production.
Weed Management In Alfalfa, Jonathan D. Green
Weed Management In Alfalfa, Jonathan D. Green
Kentucky Alfalfa and Stored Forage Conference
The importance of weed control in forage production should not be overlooked, especially when you consider the high investment associated with alfalfa and other legume forages. Weed management strategies in forage legumes should first focus on cultural practices and then on chemical weed control options. Vigorous, densely growing forage legume stands tend to have fewer weed problems. Thus, cultural and management practices that promote a highly competitive forage stand help prevent many weed problems. These practices include: 1) liming and fertilizing fields based on soil test recommendations; 2) seeding well-adapted, vigorous, and long-lived varieties; 3) buying weed-free seed; 4) cutting …
Alfalfa Haylage And Silage, Michael Collins
Alfalfa Haylage And Silage, Michael Collins
Kentucky Alfalfa and Stored Forage Conference
Even with extended grazing systems, typical winter weather conditions in Kentucky necessitate the production of some stored forage for livestock during winter. Hay has traditionally been the way of storing this forage. However, when rain occurs during haymaking operations, the losses can be severe both in yield and in forage quality. Harvest losses are greatest for very dry forage and are low for very wet material like direct cut silage. Silage offers an opportunity to avoid most of the rain damage during harvest because the crop only needs to be left out overnight in most cases to be ready to …
Buying And Selling Alfalfa Hay, Garry D. Lacefield, Jimmy C. Henning
Buying And Selling Alfalfa Hay, Garry D. Lacefield, Jimmy C. Henning
Kentucky Alfalfa and Stored Forage Conference
Alfalfa hay is an important agricultural product. Although often fed on the farms where it is produced, much alfalfa hay is also sold as a cash crop. It often constitutes a major source of income for those who sell it, or a major expense for those who buy it. Such transactions involve billions of dollars nationwide each year.