Source: AGRICULTURAL RESEARCH SERVICE submitted to
INTERACTION OF GRAZING AND DROUGHT ON MIXED-GRASS PRAIRIE VEGETATION
Sponsoring Institution
Agricultural Research Service/USDA
Project Status
NEW
Funding Source
USDA INHOUSE
Reporting Frequency
Annual
Accession No.
0404473
Grant No.
(N/A)
Project No.
5434-11210-004-01T
Proposal No.
(N/A)
Multistate No.
(N/A)
Program Code
(N/A)
Project Start Date
Aug 1, 2001
Project End Date
Jul 31, 2005
Grant Year
(N/A)
Project Director
HEITSCHMIDT R K
Recipient Organization
AGRICULTURAL RESEARCH SERVICE
(N/A)
MILES CITY,MT 59301
Performing Department
(N/A)
Non Technical Summary
(N/A)
Animal Health Component
(N/A)
Research Effort Categories
Basic
50%
Applied
50%
Developmental
0%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
1020799102020%
1020799107020%
1210799102030%
1210799107030%
Knowledge Area
102 - Soil, Plant, Water, Nutrient Relationships; 121 - Management of Range Resources;

Subject Of Investigation
0799 - Rangelands and grasslands, general;

Field Of Science
1070 - Ecology; 1020 - Physiology;
Goals / Objectives
Objective of study is to determine the effects of timing and severity of defoliation, interand intra-specific competition, and drought and their interactions on the persistence and production of western wheatgrass tillers in native mixed-grass prairie.
Project Methods
Growth dynamics of in-situ groups of varying densities of western wheatgrass tillers will be monitored under imposed, rainout shelter drought (D) and ambient control (C) conditions. Tillers cohorts will be isolated utilizing 8" PVC pipe driven into the ground about 12". Research plots will be located inside 25 x 25 m exclosures constructed on lands that have a long grazing history.