Physical Sciences and Mathematics Commons^™

Crop Updates 2000 - Cereals Part 1, Timothy G. Reeves, Sanjaya Rajaram, Maarten Van Ginkel, Richard Trethowan, Hans-Joachim Braun, Kelly Cassaday, R. A. Mcintosh, Rob Loughman, Ross Brennan, Mike Bolland, Zed Rengel, David Isbister, Paul Blackwell, Derk Bakker, Greg Hamilton, David Houlbrooke, Cliff Spann, Doug Rowe, Patrick Gethin, Stephen Loss, Frank Boetel, Tim O'Dea, Noeleen Edwards, Wayne Pluske, Ross Brennan, M. T. F. Wong, K. Wittwer, H. Zhang

Crop Updates

This session covers eleven papers from different authors:

PLENARY PAPERS

1. New Wheat for a Secure, Sustainable Future, Timothy G. Reeves, Sanjaya Rajaram, Maarten van Ginkel, Richard Trethowan, Hans-Joachim Braun, and Kelly Cassaday, International Maize and Wheat Improvement Centre (CIMMYT)

2. Managing Cereal Rusts - a National Perspective, R.A. McIntosh, University of Sydney Plant Breeding Institute, New South Wales

3. Managing Cereal Rusts in 2000 - a regional imperative, R. Loughman, Agriculture Western Australia

4. Is nutrition the answer to wheat after canola problems?Ross Brennan¹, Bill Bowden¹, Mike Bolland¹, Zed Rengel^{2 …}

Corn (Zea Mays L.) Yield Response To Nitrogen Fertilizer In Conventional And Alternative Rotations, M. M. Harbur, M. Ghaffarzadeh, R. M. Cruse

Journal of the Iowa Academy of Science: JIAS

Nitrogen (N) fertilization recommendations are not available for corn in rotation with small grains or forages despite the possibility that the N response may differ from that of more conventional corn-soybean rotations. Rotations of corn with soybean (CS), corn with soybean and oat (CSO) and corn with soybean and an oat/berseem clover intercrop (CSOB) were established in 1991 and studied from 1993 through 1998 to determine the optimal N fertilization level for corn produced in each rotation. Corn in each rotation received NH4N03 applied at the rates of 0, 56, 112, or 168 kg N ha^-1. Significant differences …

Biochemical Composition Of Particles And Dissolved Organic Matter Slong An Estuarine Gradient: Sources And Implications For Dom Reactivity, Antonio Mannino, H. Rodger Harvey

OES Faculty Publications

The chemical composition of high molecular weight dissolved organic matter (DOM) and particulate organic matter (POM) was examined along the salinity gradient of the Delaware Estuary. DOM was collected and fractionated by tangential-flow ultrafiltration into 1-30 kDa (HDOM; high molecular weight) and 30 kDa to 0.2 μm (VHDOM; very high molecular weight) and compared to particles collected in parallel. Polysaccharides comprised 12-43% of particulate organic carbon (POC), 30-56% of VHDOM carbon, and 7.5-19% of HDOM carbon. Hydrolyzable amino acids comprised 17-38% of POC, 5.4-12% of VHDOM carbon, and 1.5-4.2% of HDOM carbon. Only 7-43% of dissolved organic nitrogen in VHDOM …