HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Karsten, H. D. Articles by Carlassare, M. Search for Related Content PubMed Articles by Karsten, H. D. Articles by Carlassare, M. Agricola Articles by Karsten, H. D. Articles by Carlassare, M. Related Collections Forage Management

Describing the Botanical Composition of a Mixed Species Northeastern U.S. Pasture Rotationally Grazed by Cattle

H. D. Karsten^* and M. Carlassare

Dep. of Crop and Soil Sciences, 116 ASI Building, The Pennsylvania State Univ., University Park, PA 16802

View larger version (25K): [in a new window]   Fig. 1. Weekly precipitation (cm) and average temperatures (°C) at State College, PA, during April 1998–April 2000. Shaded bars represent precipitation, dotted lines represent average temperatures, and black diamonds designate sampling dates before grazing.

View larger version (48K): [in a new window]   Fig. 2. (a) Percent contribution to the pasture from orchardgrass, bluegrass, quackgrass, dandelions, white clover, tall legumes (alfalfa and red clover), and other species as estimated by harvested herbage, total herbage, and tiller/leaf density methods and averaged over spring, summer, and autumn dates from 1998 to 2000. a, b, c indicate a difference (P < 0.05) in percent of species among methods of describing botanical composition. Species with the same letter in all methods were not significantly different among methods at P < 0.05. (b) Percent contribution to the pasture from orchardgrass, bluegrass, quackgrass, dandelions, white clover, and other species (which included the tall legumes, alfalfa and red clover) as estimated by harvested herbage, total herbage, ground cover, and tiller/leaf density averaged over spring, summer, and autumn dates from 1999 to 2000. a, b, c indicate a difference (P < 0.05) in percent of species among methods of describing botanical composition. Species with the same letter in all methods were not significantly different among methods at P < 0.05.

View larger version (35K): [in a new window]   Fig. 3. (a) Percent contribution to the pasture from white clover according to harvested herbage, total herbage, ground cover, and tiller/leaf density estimates over spring, summer, and autumn dates from 1998 to 2000. a, b indicate methods that differed significantly (P < 0.05) among seasons. Seasons within methods with the same letter were not significantly different at P < 0.05. (b) Percent contribution to the pasture from other species (including tall legumes) according to harvested herbage, total herbage, ground cover, and tiller/leaf density estimates over spring, summer, and autumn dates from 1998 to 2000. a, b indicate methods that differed significantly (P < 0.05) among seasons. Seasons within methods with the same letter were not significantly different at P < 0.05.

View larger version (33K): [in a new window]   Fig. 4. Percent contribution to the pasture from quackgrass, white clover, and bluegrass in spring, summer, and autumn 1998 to 2000 and averaged over harvested herbage, total herbage, and tiller/leaf density estimates. a, b indicate seasons that differed significantly within methods (P < 0.05). Seasons within species with the same letter were not significantly different at P < 0.05.