Information for Principal Investigators
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- 2007 Funded Research -

Project: 222-07
Title: Development of a Rapid Technique for the Determination of Nitrate-nitrogen and Ammonium-nitrogen in Soil.
Principle Investigator/Affiliation: Ibrahim Saeed, Dept. of Soil Science, UW-Madison/SPAL.
Objective: The main objective of this study was to develop a simple, inexpensive, rapid, and reliable spectrophotometric technique for NO3-N and NH4-N analyses using a micro-plate reader. A soil extraction system that will be suitable for rapid transfer of samples to micro-plates will also be developed and tested in conjunction with the new analytical technique.
Funding Level: $12,500
Duration: 1 year

Project: 224-07
Title: Investigation of Potassium Buffer Capacities of Wisconsin Soils.
Principle Investigator/Affiliation: Carrie Laboski, Dept. of Soil Science, UW-Madison.
Objective: Evaluate soil K buffer capacity values on a range of Wisconsin soils representing the major soil groups used for soil fertility interpretations in the state. Investigate soil K buffer capacities using soils where severe K deficiency symptoms have appeared on corn. Compare K buffer capacities determined from laboratory incubations with those from field studies using the same soils and K application rates. Incorporate the results of this research into improved K fertilizer application rate guidelines.
Funding Level: $6,400
Duration: 1 year

Project: 225-07
Title: Survey of the Availability of Phosphorus from Various Manures and Manipulated Manures when Applied to Wisconsin Soils.
Principle Investigator/Affiliation: Carrie Laboski, Dept. of Soil Science, UW-Madison.
Objective: Assess the variability in P availability of different manure sources. Determine how soil type influences manure P availability. Create P availability guidelines that are specific to manure sources. Assess differences in soil P buffering capacity with source of P (fertilizer vs. manure) and soil type.
Funding Level: $17,000, $17,000, $17,000
Duration: 3 years

Project: 227-07
Title: Assessing the Effect of Split Phosphorus Fertilizer Applications on Potato Yield.
Principle Investigator/Affiliation: Carrie Laboski, Dept. of Soil Science, UW-Madison.
Objective: To assess the effect of split P applications on leaf P content and yield of potato.
Funding Level: $5,000, $5,000
Duration: 2 years