An Algorithm for Corn Nitrogen Recommendations Using a Chlorophyll Meter Based Sufficiency Index

By G. Varvel, W. Wilhelm, John F. Shanahan, James S. Schepers. 2007

113 citations recorded by the source corpus.

Subfields: Agronomy and Crop Science, Environmental Chemistry, Plant Science

View Paper: https://www.semanticscholar.org/paper/5e6ce8323817553e41e33ad6629fd10aba18fcd9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Agronomy and Crop Science

1. W. Raun
2. J. Solie
3. Marvin L. Stone
4. A. Dean Monroe
5. J. Goffart
6. Daryl Brian Arnall
7. John F. Shanahan
8. Richard B. Ferguson

In Environmental Chemistry

1. W. Raun
2. J. Solie
3. Marvin L. Stone

In Plant Science

1. W. Raun
2. J. Solie
3. Marvin L. Stone
4. A. Dean Monroe
5. Richard B. Ferguson
6. John F. Shanahan
7. Daryl Brian Arnall
8. J. Goffart

Citations in the corpus

• Potato Crop Nitrogen Status Assessment to Improve N Fertilization Management and Efficiency: Past–Present–Future (2008, background): “For other crops (wheat, maize), relative threshold values have been proposed for SPAD use (Varvel et al. 2007; Zhang et al. 2008).”
• Relationship between Grain Crop Yield Potential and Nitrogen Response (2013, background): “, 2007b), a long-term irrigated maize study near Shelton, NE (Varvel et al., 2007), a long-term dryland maize trial near Arlington, WI (Bundy et al.”
• Generalized Algorithm for Variable‐Rate Nitrogen Application in Cereal Grains (2012, methodology): “An example of the sufficiency approach is work done by Varvel et al. (2007), which used normalized chlorophyll meter readings and relative or normalized yields to calculate N application rates.”
• Independence of yield potential and crop nitrogen response (2011, background): “An example of where yield and N responsiveness was not partitioned was in the use of a sufficiency concept for recommending the application of added fertilizer N (Varvel et al. 2007).”
• An active sensor algorithm for corn nitrogen recommendations based on a chlorophyll meter algorithm. (2010, methodology): “Th e SPAD algorithm work by Varvel et al. (2007) originated from a long-term study initiated at the MSEA 1 site in 1991 (Fig.”
• Effect of winter cover crop species and planting methods on maize yield and N availability under irrigated Mediterranean conditions (2011, background): “SPAD measurements in maize leaves can indicate N deficiencies when compared with a well fertilized area (Varvel et al., 2007).”
• Active Sensor Reflectance Measurements of Corn Nitrogen Status and Yield Potential (2008, background): “Work by Blackmer et al. (1993) and Blackmer and Schepers (1994, 1995) has shown that CM assessments can be used to monitor corn N status for more effi cient fertilizer N application.”
• A visible band index for remote sensing leaf chlorophyll content at the canopy scale (2013, methodology): “Leaf chlorophyll meters (Minolta SPAD-502 meter, http://konicaminolta.com/products/instruments/spad/index.html) were used to monitor crop nitrogen status (Schepers et al., 1992; Varvel et al., 2007).”