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Articles 10411 - 10440 of 11285

Full-Text Articles in Weed Science

Influence Of Crop Rotation, Tillage, And Management Inputs On Weed Seed Production, George O. Kegode, Frank Forcella, Sharon Clay Apr 1999

Influence Of Crop Rotation, Tillage, And Management Inputs On Weed Seed Production, George O. Kegode, Frank Forcella, Sharon Clay

Agronomy, Horticulture and Plant Science Faculty Publications

Approaches to crop production that successfully reduce weed seed production can benefit farming systems by reducing management inputs and costs. A 5-yr rotation study was conducted in order to determine the effects that interactions between crop rotation, tillage, and amount of herbicide and fertilizer (management inputs) have on annual grass and broad-leaved weed seed production and fecundity. There were 10 crop rotation and tillage system combinations and three levels of management inputs (high, medium, and low). Green and yellow foxtail were the major weed species, and together they yielded between 76 and 93% of collected weed seeds. From 1990 to …


Native Vegetation Handbook For The Shire Of Kondinin, Bec Ryan Mar 1999

Native Vegetation Handbook For The Shire Of Kondinin, Bec Ryan

Bulletins 4000 -

This booklet provides land managers with information relating to the natural resources of the Shire of Kondinin, including the landscape, geology, soils, drainage systems, native flora and fauna. Information about native flora and vegetation has been drawn from a variety of sources, including surveys that estimated the distribution of plant communities prior to clearing, recent surveys of privately owned remnants, herbarium collections, surveys of nature reserves and roadside surveys. Some of the problems relating to the management of these resources within the shire and ideas or community initiatives to solve these problems are also discussed. It is hoped that this …


The Prairie Naturalist Volume 31, No.1 March 1999 Mar 1999

The Prairie Naturalist Volume 31, No.1 March 1999

The Prairie Naturalist

NEST SITE CHARACTERISTICS OF RING-NECKED PHEASANTS IN EASTERN SOUTH DAKOTA ▪ J. R. Purvis, A. E. Gabbert, and L. D. Flake

FIELD EVALUATION OF RADIOTRANSMITTERS FOR NORTHERN POCKET GOPHERS ▪ G. W. Witmer and M. J. Pipas

DISTRlBllTiON OF A MOlJND-BUILDING ANT ON NATIVE AND RESTORED PRAIRIES IN NORTHEASTERN KANSAS ▪ J. Foster and W. D. Kettle

RESULTS OF A WILD TURKEY RELEASE IN KANSAS TALLGRASS PRAIRIE ▪ J. F. Cully, Jr., P. R. Lemons, II, and R. D. Applegate

BODY-SIZE AND AGE'-RELATED MASTICATORY RELATIONSHIPS IN TWO SPECIES OF BLARINA ▪ B. J. Verts, L. N. Carraway, and R. A. …


Native Vegetation Handbook For The Shire Of Lake Grace, Bec Ryan Mar 1999

Native Vegetation Handbook For The Shire Of Lake Grace, Bec Ryan

Bulletins 4000 -

This handbook provides land managers with information relating to the natural resources of the Shire of Lake Grace, including the landscape, geology, soils, drainage systems, native flora and fauna. Information about native flora and vegetation has been drawn from a variety of sources, including surveys that estimated the distribution of plan communities prior to clearing, recent surveys of privately owned remnants, herbarium collections, surveys of nature reserves and roadside surveys. Some of the problems relating to the management of these resources within the shire and ideas and community initiatives to solve these problems are also discussed. It is hoped that …


Herbicide Evaluation In Arkansas Rice, 1997, Ron Talbert, Ford Baldwin, David Gealy, Eric Webster, Tomilea Dillon, Lance Schmidt, Jeff Rutledge, Celeste Wheller, Leopoldo Estorninos Jr. Mar 1999

Herbicide Evaluation In Arkansas Rice, 1997, Ron Talbert, Ford Baldwin, David Gealy, Eric Webster, Tomilea Dillon, Lance Schmidt, Jeff Rutledge, Celeste Wheller, Leopoldo Estorninos Jr.

Arkansas Agricultural Experiment Station Research Series

Weed control is economically important for production of rice, a major crop in Arkansas. These findings summarize efforts of the team of Arkansas scientists working on weed control strategies for rice during 1997. Various technologies were evaluated in field studies at five locations involving the major weed problems and rice production systems used in the state. Results from these studies will add to the arsenal of weed control options for producers. Highlights include synergists and safeners for herbicides to aid in control of propanil-resistant barnyardgrass; herbicides and flooding techniques for control of red rice and other weeds; and the use …


Crop Updates 1999 - Oilseeds, Paul Carmody, Rick Madin, David Bowran, Martin Barbetti, Ravjit Khangura, Graham Walton, Phil Parker, Francoise Berlandier, Linnet Cartwright, Ping Si, Nick Galwey, David Turner, Wayne Pluske, Roger Jones, Brenda Coutts, Bill Bowden, Isabel Arevalo-Vigne, Jeff Russell, Syed H. Zaheer, Andrew Simon, Art Diggle, Dave Eksteen, Arjen Ryder, Bill Crabtree, Serena Wyatt, Jim Baily Feb 1999

Crop Updates 1999 - Oilseeds, Paul Carmody, Rick Madin, David Bowran, Martin Barbetti, Ravjit Khangura, Graham Walton, Phil Parker, Francoise Berlandier, Linnet Cartwright, Ping Si, Nick Galwey, David Turner, Wayne Pluske, Roger Jones, Brenda Coutts, Bill Bowden, Isabel Arevalo-Vigne, Jeff Russell, Syed H. Zaheer, Andrew Simon, Art Diggle, Dave Eksteen, Arjen Ryder, Bill Crabtree, Serena Wyatt, Jim Baily

Crop Updates

This article contains eighteen papers

  1. INTRODUCTION, Paul Carmody, Agriculture Western Australia

PLENARY SESSION

  1. Transgenic canola in Western Australia: Outlook and challenges, Phil Salisbury, University of Melbourne

  2. Farming system issues for herbicide tolerant canola, Rick Madin, Rick Madin and Associates, David Bowran, Agriculture Western Australia

  3. Beating blackleg in 1999, Martin Barbetti, Ravjit Khangura, Paul Carmody, Graham Walton, Agriculture Western Australia

  4. The Mustard Industry in Australia – Opportunities for a new oilseed, Phil Parker, NSW Agriculture

  5. Management of blackleg with fungicides, Ravjit Khangura and Martin Barbetti, Agriculture Western Australia

  6. Effect of aphid feeding …


Crop Updates 1999 - Lupins, Greg Shea, Geoff Thomas, Mark Sweetingham, Bill O'Neill, Wallace Cowling, Bevan Buirchell, Hua'an Yang, David Luckett, Allan Brown, John Hamblin, Joanne E. Barton, Kedar Adhikari, Nick Galwey, Miles Dracup, Bob French, Debbie Thackray, Roger Jones, Brenda Coutts, Narelle Reeve, Y. Cheng, R. A.C. Jones, Francoise Berlandier, Linnet Cartwright, James Fisher, Art Diggle, Bill Bowden, Chris Gazey, Luigi Morsechi, Terry Piper, Peter Newman, Dave Nicholsen, Mohammad Amjad, Glen Riethmuller, Ron Javis, Paul Blackwell, C. L. White Feb 1999

Crop Updates 1999 - Lupins, Greg Shea, Geoff Thomas, Mark Sweetingham, Bill O'Neill, Wallace Cowling, Bevan Buirchell, Hua'an Yang, David Luckett, Allan Brown, John Hamblin, Joanne E. Barton, Kedar Adhikari, Nick Galwey, Miles Dracup, Bob French, Debbie Thackray, Roger Jones, Brenda Coutts, Narelle Reeve, Y. Cheng, R. A.C. Jones, Francoise Berlandier, Linnet Cartwright, James Fisher, Art Diggle, Bill Bowden, Chris Gazey, Luigi Morsechi, Terry Piper, Peter Newman, Dave Nicholsen, Mohammad Amjad, Glen Riethmuller, Ron Javis, Paul Blackwell, C. L. White

Crop Updates

This article contains twenty three papers

1998 LUPIN HIGHLIGHTS

LUPIN ANTHRACNOSE

1. Anthracnose overview, Greg Shea, Geoff Thomas and Mark Sweetingham, Agriculture Western Australia

2. Anthracnose – Critical seed infection levels for resistant and susceptible varieties, Geoff Thomas, Mark Sweetingham, Bill O'Neill and Greg Shea, Agriculture

Western Australia

3. Fungicide seed treatment for anthracnose and brown spot control in lupin, G. Thomas and M. Sweetingham, Agriculture Western Australia

LUPIN BREEDING AND AGRONOMY

4. Anthracnose resistance in lupins – an innovative Australian research effort 1996-1998, Wallace Cowling1'2, Bevan Buirchell1,2 Mark Sweetinqham1,2, Hua'an Yang2, …


Legume Logic Number 102 Feb 1999

Legume Logic Number 102

Legume Logic

Contents

Good luck - means less management

Summer weeds

Lime requirements for cropping rotations

1999 Grower Outlook meetings

Lupin flour


Native Vegetation Handbook For The Shire Of Kulin, Bec Ryan Feb 1999

Native Vegetation Handbook For The Shire Of Kulin, Bec Ryan

Bulletins 4000 -

This handbook provides land managers with information relating to the natural resources of the Shire of Kulin, including the landscape, geology, soils, drainage systems, native flora and fauna. Information about native flora and vegetation has been drawn from a variety of sources, including surveys that estimated the distribution of plant communities prior to clearing, recent surveys of privately owned remnants, herbarium collections, surveys of nature reserves and roadside surveys. Some of the problems relating to the management of these resources within the Shire and ideas and community initiatives to solve these problems are also discussed. It is hoped that this …


Native Vegetation Handbook For The Shire Of Northam, Sarah J. Weaving Jan 1999

Native Vegetation Handbook For The Shire Of Northam, Sarah J. Weaving

Native vegetation handbook series

This booklet provides land managers with information relating to the natural resources of the Shire of Northam, including the existing and original vegetation, fauna and flora, drainage systems, topography and soils. Some of the problems relating to the management of these resources within the Shire and community initiatives to deal with these problems are also discussed. It is hoped that this information will contribute to the long term viability of the agricultural landscape and the conservation of native vegetation within the Shire.


Native Vegetation Handbook For The Shire Of Toodyay, Sarah J. Weaving Jan 1999

Native Vegetation Handbook For The Shire Of Toodyay, Sarah J. Weaving

Native vegetation handbook series

The Handbook provides land managers with information relating to the natural resources of the Shire of Toodyay, including the original and existing vegetation, drainage systems and soils. Some of the problems relating to the management of these resources within the Shire and ideas and community initiatives to solve these problems are also discussed. It is hoped that this information will contribute to the long term viability of the agricultural landscape and the conservation of native vegetation within the shire.


Effects Of Competition On Resource Availability And Growth Of A California Bunchgrass, Andrew R. Dyer, Kevin J. Rice Jan 1999

Effects Of Competition On Resource Availability And Growth Of A California Bunchgrass, Andrew R. Dyer, Kevin J. Rice

Faculty Publications

In California, little is known about the sensitivity of native bunchgrasses to competition or to changes in resource availability. We investigated the effect of nonnative annual vegetation on resource availability and growth of a native bunchgrass, Nassella pulchra, in a pair of factorial field experiments that incorporated effects of both interspecific and intraspecific competition as well as variation in soil depth. Plots of differing target densities and neighborhoods were used to assess changes in aboveground (light) and belowground (water) resource availability over multiple seasons in two sites with differing soil depth. N. pulchra grown without interspecific competitors grew larger …


The Prairie Naturalist Volume 30, No.4 December 1998 Dec 1998

The Prairie Naturalist Volume 30, No.4 December 1998

The Prairie Naturalist

FISH COMMUNITY AND WATER QUALITY CHANGES IN THE BIG SIOUX RIVER ▪ D. Dieterman, and C. R. Berry, Jr.

EFFECTS OF PARASITOIDS AND COMPETITION ON CLUTCH SIZE OF A GALLING MIDGE ▪ D. J. Kinateder and S. J. Stein

RESPONSE OF BREEDING SEASON BLUE-WINGED TEAL TO DECOY TRAPPING ▪ P. R. Garrettson

COMPARISON OF POINT-COUNT AND WADE-FLUSH METHODS FOR COUNTING DUCKS ▪ G. M. Linz, C. P McMurl, H. J. Homan, and D. L. Bergman

Reviewers 1998

Author Index - Volume 30

Subject Index - Volume 30

Announcements


The Prairie Naturalist Volume 30, No. 3 September 1998 Sep 1998

The Prairie Naturalist Volume 30, No. 3 September 1998

The Prairie Naturalist

GROWTH OF SPOTIED BASS IN KANSAS STREAMS AND IMPOUNDMENTS ▪ J. S. Tillma and C. S. Guy

SIZE SELECTION OF RAINBOW SMELT BY SMALL MESH GILL NETS ▪ C. E. Freiburger and W. G. Duffy

ABUNDANCE AND HABITAT AFFINITIES OF Cyclotracheius substriatus (Coleoptera: Carabidae) ON NORTHERN SHORTGRASS PRAIRIE ▪ N. E. Mcintyre 157

THE REPRODUCTIVE BIOLOGY OF CANDLE ANEMONE ▪ B. Molano-Flores and S. D. Hendrix

NOTES

Noteworthy Records of Bats from Southern Colorado ▪ E. W. Valdez

Eggshell Removal by Duck Hens Following

Partial Nest Depredation by Striped Skunk ▪ S. Lariviere and L. R. Walton

New Records of …


The Chickpea Book : A Technical Guide To Chickpea Production, Stephen Loss, Neil Brandon, K H M. Siddique Sep 1998

The Chickpea Book : A Technical Guide To Chickpea Production, Stephen Loss, Neil Brandon, K H M. Siddique

Bulletins 4000 -

The area of chickpea production in Australia has expanded rapidly in recent years especially in south-western Australia. This has been partly brought about by the keen interest of farmers and a concerted research effort and industry development by Agriculture Western Australia, The Centre for Legumes in Mediterranean Agriculture (CLIMA) and other institutions, in partnership with the Grains Research and Development Corporation and other industry funding bodies. Private consultants, grain traders and other industry groups have also contributed to the expansion of the industry.

Much of the local knowledge generated by these research and development projects has been published in various …


Legume Logic Number 95 Jun 1998

Legume Logic Number 95

Legume Logic

Contents

Seasonal situation

Safe cropping

Pulse points

Herbicide damage

AgraCorp Pulse Indicator Prices as 23 June

Controlling grass weeds in pulse crops

Post-emergent broadleafed weed control


The Prairie Naturalist Volume 30, No.2 June 1998 Jun 1998

The Prairie Naturalist Volume 30, No.2 June 1998

The Prairie Naturalist

REPRODUCTIVE SUCCESS OF SHARP-TAILED GROUSE IN CENTRAL MONTANA ▪ K. R. Bousquet and J. J. Rotella

EFFECTS OF DROUGHT ON RECLAIMED GRASSLANDS IN WESTERN NORTH DAKOTA ▪ D. R. Kirby, L. M. Stewart, K. D. Krabbenhoft, and D. J. Nilson

MALE COMMON NIGHTHAWK USE OF GRAVEL ROADS AT NIGHT ▪ R. G. Poulin, L. D. Todd, and R. M. Brigham

RESTORATION AND STATUS OF THE RUFFED GROUSE IN KANSAS ▪ R. D. Rodgers, R. W. Wells, K. E. Church, R. L. Whiteaker, M. T. McFadden, D. S. Lekie, R. A. Bergquist, H. J. Abel, and R. D. Applegate

PITFALL TRAPPING …


Leafy Spurge Biological Control Using Black Dot Flea Beetles And Deleterious Rhizobacteria: Final Report Submitted To South Dakota Department Of Agriculture Weed And Pest Control, Sharon A. Clay, Mark A. Brinkman, Robert J. Kramer, Jan J. Jackson, Nels H. Granholm Apr 1998

Leafy Spurge Biological Control Using Black Dot Flea Beetles And Deleterious Rhizobacteria: Final Report Submitted To South Dakota Department Of Agriculture Weed And Pest Control, Sharon A. Clay, Mark A. Brinkman, Robert J. Kramer, Jan J. Jackson, Nels H. Granholm

Agronomy, Horticulture and Plant Science Faculty Publications

Size of leafy spurge (Euphorbia esula L) roots and their location in the soil profile are important factors relating to survival offirst-instar black dot flea beetle (Aphthona nigriscutis Foudras) larvae. First-instar larvae must find leafy spurge roots between 1 to 4 mm diam in the first 2 days after hatching from eggs for survival. In field studies, we ddermined that most flea beetle larvae reside within 7.6 em ofthe soil surface. Their location in the upper areas ofthe soil profile allows accessibility to desirable size roots, however the larvae are more susceptible to freezing temperatures in this region. Overall, there …


The Prairie Naturalist Volume 30, No.1 March 1998 Mar 1998

The Prairie Naturalist Volume 30, No.1 March 1998

The Prairie Naturalist

WATERFOWL FOODS OF CULTIVATED WILD RICE PADDIES IN NORTHWEST MINNESOTA ▪ J. T. Huseby, W. Po Cymbaluk, A. J. Melvie, W. D. Svedarsky, and R. D. Crawford

ICHTHYOFAUNA IN STREAMS OF THE MISSOURI RIVER DRAINAGE, WYOMING ▪ T. M. Patton, W. A. Hubert, and F. J. Rahel

Aphthona nigriscutis LARVAL DENSITIES IN CAMPBELL COUNTY, SOUTH DAKOTA ▪ M. A. Brinkman and S. A. Clay

DIETS OF BISON SOCIAL GROUPS ON TALLGRASS PRAIRIE IN OKLAHOMA ▪ B. R. Coppedge and J. H. Shaw

NUTRIENT AND ENERGETIC CHARACTERISTICS OF GRASSHOPPERS OF DIFFERENT LIFE STAGES ▪ R. J. Robel, C. A. Desjardins, and …


Bowen Ratio Estimates Of Evapotranspiration For Stands On The Virgin River In Southern Nevada, Dale A. Devitt, A. Sala, S. D. Smith, J. Cleverly, L. K. Shaulis, R. Hammett Jan 1998

Bowen Ratio Estimates Of Evapotranspiration For Stands On The Virgin River In Southern Nevada, Dale A. Devitt, A. Sala, S. D. Smith, J. Cleverly, L. K. Shaulis, R. Hammett

Life Sciences Faculty Research

A Bowen ratio energy balance was conducted over a Tamarix ramosissima (saltcedar) stand growing in a riparian corridor along the Virgin River in southern Nevada. Measurements in two separate years were compared and contrasted on the basis of changes in growing conditions. In 1994, a drought year, record high temperatures, dry winds, and a falling water table caused partial wilt of outer smaller twigs in the canopy of many trees in the stand around the Bowen tower. Subsequently, evapotranspiration (ET) estimates declined dramatically over a 60‐day period (11 mm d−1 tod−1). In 1995, the Virgin River at the Bowen tower …


Northern Australia Quarantine Strategy. Weeds Target List, B. M. Waterhouse, A A. Mitchell Jan 1998

Northern Australia Quarantine Strategy. Weeds Target List, B. M. Waterhouse, A A. Mitchell

Biosecurity published reports

Second edition.

The Northern Australia Quarantine Strategy (NAQS) was established in 1989 as an outcome of a major evaluation of quarantine in Australia (AGPS 1987, 1988). NAQS activities include surveying for weeds,insect pests and diseases of plants; and pests and diseases of animals in northern Australia, Papua New Guinea and Indonesia. The primary goal is to provide early detection and warning of new quarantine threats or incursions.

A targetted approach was adopted for all pests, diseases and weeds. For each category of pest, experts in the discipline compiled lists of organisms not known from Australia but known to occur in …


The Prairie Naturalist Volume 29, No.4. December 1997 Dec 1997

The Prairie Naturalist Volume 29, No.4. December 1997

The Prairie Naturalist

BUTTERFLY SPECIES IN NATIVE PRAIRIE AND RESTORED PRAIRIE ▪ D. M. Debinski and A. M. Babbit

BACK-CALCULATED LENGTH-AT-AGE ESTIMATES FROM TWO SCALE RADII ▪ K. L. Hurley, K. L. Pope, and D. W. Willis

DIET OF NORTH DAKOTA ELK DETERMINED FROM RUMEN AND FECAL ANALYSES ▪ R. G. Osborn, J. A. Jenks, and W. F. Jensen

INTERSPECIFIC COMPETITION FOR FOOD BETWEEN WHITE-FOOTED MICE AND EASTERN WOODRATS ▪ B. G. Aloiau, D. M. Post, and E. A. Home

NESTING PIPING PLOVER AND LEAST TERN ON THE KANSAS RIVER ▪ W. H. Busby, D. W. Mulhern, P. G. Kramos, and D. A. …


Herbicide Evaluation In Arkansas Rice, 1996, Eric Webster, Ron Talbert, Ford Baldwin, David Gealy, Tomilea Dillon, Jason Norsworthy, Lance Schmidt, Dwayne Beaty Oct 1997

Herbicide Evaluation In Arkansas Rice, 1996, Eric Webster, Ron Talbert, Ford Baldwin, David Gealy, Tomilea Dillon, Jason Norsworthy, Lance Schmidt, Dwayne Beaty

Arkansas Agricultural Experiment Station Research Series

No abstract provided.


The Prairie Naturalist Volume 29, No.3. September 1997 Sep 1997

The Prairie Naturalist Volume 29, No.3. September 1997

The Prairie Naturalist

FISHING STATISTICS IN KANSAS PUT-AND-TAKE RAINBOW TROUT FISHERIES ▪ R. D. Schultz and D. D. Nygren

DISTRIBUTIONAL STATUS Of UNCOMMON FISHES AND AN AMPHIBIAN FROM NORTHEASTERN MISSOURI ▪ R. A. Hrabik,

DIET OF A RELICT POPULATION OF THE EASTERN WOODRAT IN NEBRASKA ▪ H. H. Genoways, P. W Freeman, and M. K. Clausen

ANIMAL SPECIES MONITORED BY THE SOUTH DAKOTA NATURAL HERITAGE PROGRAM ▪ E. D. Stukel and D. C. Backlund

Dedication

Announcements


Native Vegetation Handbook For The Shire Of Beverley, Rod Safstrom Jul 1997

Native Vegetation Handbook For The Shire Of Beverley, Rod Safstrom

Native vegetation handbook series

This Handbook is one of a series covering the agricultural region of Western Australia. The Handbook aims to assist the development of sustainable farming systems which combine agricultural production and nature conservation. Information is provided on the natural resources of the Shire of Beverley, including the existing vegetation, drainage systems and soils. Problems in managing these resources are described and community initiatives to tackle the problems are summarised.


Native Vegetation Handbook For The Shire Of Pingelly, Rod Safstrom Jul 1997

Native Vegetation Handbook For The Shire Of Pingelly, Rod Safstrom

Native vegetation handbook series

This Handbook is one of a series covering the agricultural region of Western Australia. The Handbook aims to assist the development of sustainable farming systems which combine agricultural production and nature conservation. Information is provided on the natural resources of the Shire of Pingelly, including the existing vegetation, drainage systems and soils. Problems in managing these resources are described and community initiatives to tackle the problems are summarised. It is hoped that this Handbook will contribute to the long term viability of the agricultural landscape and the conservation of native vegetation within the Shire.


Native Vegetation Handbook For The Shire Of Brookton, Rod Safstrom Jul 1997

Native Vegetation Handbook For The Shire Of Brookton, Rod Safstrom

Native vegetation handbook series

This Handbook is one of a series covering the agricultural region of Western Australia. The Handbook aims to assist the development of sustainable farming systems which combine agricultural production and nature conservation. Information is provided on the natural resources of the Shire of Brookton, including the existing vegetation, drainage systems and soils. Problems in managing these resources are described and community initiatives to tackle the problems are summarised. It is hoped this Handbook will contribute to the long term viability of the agricultural landscape and the conservation of native vegetation within the Shire.


Native Vegetation Handbook For The Shire Of Bridgetown-Greenbushes, Shaun B. Grein Jun 1997

Native Vegetation Handbook For The Shire Of Bridgetown-Greenbushes, Shaun B. Grein

Native vegetation handbook series

This booklet provides rural land managers with information relating to the natural resources of the Shire of Bridgetown-Greenbushes including the existing vegetation, drainage systems and soils. Some of the problems relating to the management of natural resources in the Shire of Bridgetown-Greenbushes and possible solutions to these problems are also discussed. By providing this information, it is hoped this booklet will contribute to the long term viability of the rural landscape and the conservation of native vegetation within the Shire.


The Prairie Naturalist Volume 29, No.2. June 1997 Jun 1997

The Prairie Naturalist Volume 29, No.2. June 1997

The Prairie Naturalist

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1996 ▪ . R. N. Randall

BREEDING BIRD RICHNESS IN THE PRAIRIE POTHOLE REGION OF MINNESOTA ▪ . S. L. Niesar and D. E. Hubbard

UNUSUAL MIGRATION BY A WHITE-TAILED DEER FAWN IN SOUTH DAKOTA ▪ C. S. DePerno, S. L. Griffin, J. A. Jenks, and L. A. Rice

COYOTE FOOD HABITS AT DESOTO NATIONAL WILDLIFE REFUGE, NEBRASKA ▪ J. J. Huebschman, S. E. Hygnstrom, and J. A. Gubanyi

WHITE BASS GROWTH IN SOUTH DAKOTA WATERS ▪ D. W. Willis, H. D. Beck, C. A. Soupir, B. A. Johnson, G. D. Simpson, and …


Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice May 1997

Intraspecific And Diffuse Competition: The Response Of Nassella Pulchra In A California Grassland, Andrew R. Dyer, Kevin J. Rice

Faculty Publications

In inland California grasslands, the high densities of alien annual species have altered the growing environment for native perennial grasses. Using variable-density plots, we measured the influence of intraspecific competition (conspecifics only) and diffuse competition (mixed-composition neighborhoods that include conspecifics) on growth and survival of Nassella pulchra, purple needlegrass. We assessed the effects of intraspecific and diffuse competition in weeded plots and unweeded plots, respectively, across a density gradient of N. pulchra plants (16–356 plants/m2). We used summer fire and spring sheep grazing to reduce diffuse competition in unweeded plots. The potential effect of rooting volume on competitive interactions …