Fertilizer and Swine Manure Management Systems Impacts on Phosphorus in Soil and Subsurface Tile Drainage

Swine manure and fertilizer can be used to supply the nitrogen (N) and phosphorus (P) needs of crops. Excess P application sometimes applied with N-based manure for corn increases the risk of P loss and water quality impairment. Poor water quality in Iowa streams and lakes due to excess P has prompted questions about the impact of cropping and nutrient management systems on P loss from fields.

Proceedings of the 24th Annual Biochemical Engineering Symposium

The 24th Biochemical Engineering Symposium was held 9-10 September 1994 at the YMCA of the Rockies conference center in Estes Park, Colorado, under the sponsorship of the Department of Chemical Engineering at the University of Colorado. Previous symposia in this series have been hosted by Kansas State University (1st, 3rd, 5th, 9th, 12th, 16th, 20th), University of Nebraska-Lincoln (2nd, 4th), Iowa State University (6th, 7th, 10th, 13th, 17th, 22nd), University of Missouri-Columbia (8th, 14th, 19th), Colorado State University (11th, 15th, 21st), University of Colorado (18th), and the University of Oklahoma (23rd). The next symposium is scheduled to be held at the University of Missouri-Columbia. The symposia are devoted to talks by students about their ongoing research. Because final publication usually takes place elsewhere, the papers included in the proceedings are brief, and often cover work in progress. ContentsIn-Well Aeration: An Innovative Subsurface Remediation TechnologyPrashant Gandhi, X. Yang, L.E. Erickson, and L. T. Fan; Kansas State University Expression of an Antimicrobial Peptide Analog in Eacherlchill coliChris Haught and Roger G. Harrison; University of Oklahoma Using High-frequency Backpulaing to Maximize Croasflow Filtration PerformanceSanjeev G. Redkar and Robert H. Davis; University of Colorado Low Molecular Weight Organic Compositions of Acid Waters from Vegetable Oil SoapstocksSteven L. Johansen, Arunthathi Sivasothy, Peter J. Reilly, and Earl G. Hammond; Iowa State University; Michael K. Dowd; U.S. Department of Agriculture Gas Phase Composition Effects on Suspension Cultures of Taxus cuspidata Noushin Mirjalili and James C. Linden; Colorado State University Cybernetic Modeling of Spontaneous Oscillations in Continuous Cultures of Ssccharomyces cerevisiaeKenneth D. Jones and Dhinakar S. Kompala; University of Colorado The Effect of Turbulent Shear on Calcium Mobilization in Mammalian CellsChristopher M. Cannizzaro, Pradyumna K. Namdev, and Eric H. Dunlop; Colorado State University Experimental Studies of Droplet Ejection at the Free Surface In Sparged ReactorsT. Y. Yiin, L A. Glasgow, and L. E. Erickson; Kansas State University The Role of Domain E (Starch-Binding Region) on the Activity of a Bacillus macersns Cyclodextrln GlucanotransferaseHai-yin Chang, Trang Le, and Zivko L. Nikolov; Iowa State University Use of the Rotating Wall Vessel for Study of Plant Cell Suspension CulturesXinzhi Sun and James C. Linden; Colorado State University A Novel Counter-Current Distribution Apparatus for the Study of Multi-Stage Aqueous Two-Phase Extraction of Biomolecules and Cell ParticlesMartin R. Guinn and Paul Todd; University of Colorado The Dynamics of Unhooking and Contraction of a Polyelectrolyte Chain Around an Isolated PostLin Zhang and Edith M. Sevick; University of Colorado A Laboratory Study of the Fate of Trichloroathylene and 1,1,1-Trlchloroathane In the Presence of Alfalfa PlantsMuralidharan Narayanan, Ryan M. Green, Lawrence C. Davis, and Larry E. Erickson; Kansas State University Modeling the Fate of Pyrene In the RhIzosphereS.K. Santharam, LE. Erickson, and L. T. Fan; Kansas State University Derivatization of MaltooligosaccharidesDaniela Prinz, Peter J. Reilly, and Zivko L. Nikolov; Iowa State University Probing Surfactant-Protein Binding by EPA SpectroscopyNarendra B. Bam, Yale University; Theodore W. Randolph; University of Colorado Optimization of a Stir-Cell Bioreactor for In Vitro Production of RNANeal T. Williams, Kim A. Wicklund, and Robert H. Davis; University of Colorado

Phosphorus and Potassium Rates and Placement Methods for Corn and Soybean Managed with No-till or Tillage

No-till management for corn and soybean results in little or no incorporation of crop residues and fertilizer with soil. Subsurface banding phosphorus (P) and potassium (K) fertilizers with planter attachments could be more effective than broadcast fertilization, because in no-till with broadcast fertilizer, both nutrients accumulate at or near the soil surface. A long-term study was initiated in 1994 at the ISU Northwest Research Farm to evaluate P and K fertilizer placement for corn and soybean managed with no-till and chiselplow tillage.