Leopold Center for Sustainable Agriculture

OrgUnit Logo
Date established

Publication Search Results

Now showing 1 - 3 of 3
No Thumbnail Available

Improving tree establishment with forage crops

2002-01-01 , Mize, Carl , Brummer, E. Charles , Delate, Kathleen , Negreros-Castillo, Patricia , Colletti, Joseph , Leopold Center for Sustainable Agriculture

Weed competition and economics are two common barriers to Iowa farmers' investing in tree plantings. This project examined seven weed control strategies and investigated productivity of small grain/forage combinations raised with trees in an effort to suggest management options that would encourage tree planting in the state.

No Thumbnail Available

Evaluation of interactions within a shelterbelt agroecosystem

1997 , Mize, Carl , Colletti, Joseph , Cruse, Richard , Ghaffarzadeh, Mohammad , Leopold Center for Sustainable Agriculture

A tree shelterbeit comprised of four rows of hybrid poplars was established near Ogden, Iowa in 1992 to evaluate shelterbeit characteristics and impacts on soil water content and crop growth andyieid. Major emphasis was on testing crops of corn and soybeans. The first three years saw little effects from the shelterbeit, and data from these years will be used to develop a baseline for future measurements. In the fourth and fifth years, corn yield patterns suggested that the shelterbeit increases yields in the zone leeward from the shelterbeit. Soybeans have not shown a response to the presence of the shelterbeit.

No Thumbnail Available

Sustainable tree-shrub-grass buffer strips along waterways

1994 , Schultz, Richard , Schultz, Richard , Colletti, Joseph , Mize, Carl , Jungst, Steven , Wray, Paul , Rule, Lita , Hall, Richard , Simpkins, William , Thompson, Michael , Anderson, Irvin , Buxton, Dwayne , Leopold Center for Sustainable Agriculture

The midwestern landscape, which formerly consisted of prairies, wetlands, and forests, is now primarily devoted to agricultural purposes. Unfortunately, the resulting large-scale agricultural production has also produced nonpoint source (NPS) pollution of water, alteration of waterways, and disruption of wildlife habitat. NPS pollution, whether by sediment, fertilizers, or pesticides, is a problem nationwide. The agricultural community has addressed this problem by increasing soil conservation efforts and improving chemical application practices. One Best Management Practice (BMP) is the use of riparian (streamside) vegetative filter strips on watersheds prone to such pollution. Most such filter strips to date consist primarily of cool-season grasses.