Search Results - "Czymmek, Karl J."

Accuracy of NDVI-derived corn yield predictions is impacted by time of sensing by Maresma, Angel, Chamberlain, Lindsay, Tagarakis, Aristotelis, Kharel, Tulsi, Godwin, Greg, Czymmek, Karl J., Shields, Elson, Ketterings, Quirine M.

“…•Growth stage and timing of N application impact yield prediction accuracy by NDVI.•Best yield estimates were obtained with a UAV-mounted camera at the R2…”
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Corn Grain Yield Prediction and Mapping from Unmanned Aerial System (UAS) Multispectral Imagery by Sunoj, S., Cho, Jason, Guinness, Joe, van Aardt, Jan, Czymmek, Karl J., Ketterings, Quirine M.

“…Harvester-mounted yield monitor sensors are expensive and require calibration and data cleaning. Therefore, we evaluated six vegetation indices (VI) from…”
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Proposed Method for Statistical Analysis of On-Farm Single Strip Treatment Trials by Cho, Jason B., Guinness, Joseph, Kharel, Tulsi, Maresma, Ángel, Czymmek, Karl J., van Aardt, Jan, Ketterings, Quirine M.

“…On-farm experimentation (OFE) allows farmers to improve crop management over time. The randomized complete blocks design (RCBD) with field-length strips as…”
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Combining field phosphorus runoff risk assessments with whole‐farm phosphorus balances to guide manure management decisions by Ros, Mart B.H., Czymmek, Karl J., Ketterings, Quirine M.

“…Phosphorus (P) loss from agricultural fields contributes to water quality degradation. A phosphorus index (PI) is a tool that scores fields based on P loss…”
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Restructuring the P Index to Better Address P Management in New York by Ketterings, Quirine M., Cela, Sebastian, Collick, Amy S., Crittenden, Stephen J., Czymmek, Karl J.

“…The New York Phosphorus Index (NY‐PI) was introduced in 2001 after the release of the state's first Concentrated Animal Feeding Operation (CAFO) Permit that…”
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Shifting from N-based to P-based manure management maintains soil test phosphorus dynamics in a long-term corn and alfalfa rotation by Sadeghpour, Amir, Ketterings, Quirine M., Godwin, Gregory S., Czymmek, Karl J.

“…Multiyear repeated dairy manure application based on nitrogen (N) needs of corn ( Zea mays L.) increases soil test phosphorus (P) concentration and risk of P…”
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Changes in nutrient mass balances over time and related drivers for 54 New York State dairy farms by Soberon, Melanie A, Cela, Sebastian, Ketterings, Quirine M, Rasmussen, Caroline N, Czymmek, Karl J

“…Whole-farm nutrient mass balances (NMB) can assist producers in evaluation and monitoring the nutrient status of dairy farms over time. Most of the previous…”
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Phosphorus Index as a Phosphorus Awareness Tool: Documented Phosphorus Use Reduction in New York State by Ketterings, Quirine M., Czymmek, Karl J.

“…In 1999, New York introduced its concentrated animal feeding operation (CAFO) permit followed, in 2001, by release of the New York phosphorus index (NY‐PI) and…”
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Soil Phosphorus Saturation Ratio Sets Comparable Manure Application Cutoffs Across States Differing in Agronomic Soil Test by Crittenden, Stephen J, Ketterings, Quirine M, Knight, Julia, Czymmek, Karl J

“…ABSTRACTRegionalization of phosphorus indices (PI) across state boundaries requires evaluation of compatibility of agronomic soil test P levels used as…”
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Nitrogen and Phosphorus Balances Vary at the Whole-Farm, Field, and Within-Field Scales by Berlingeri, Jonathan M., Lawrence, Joseph R., Sunoj, S., Czymmek, Karl J., Ketterings, Quirine M.

“…A field nutrient balance (supplied minus harvested) can be an effective, end-of-season management evaluation tool. However, development of guidance for…”
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Shallow mixing of surface soil and liquid dairy manure conserves nitrogen while retaining surface residue by Ketterings, Quirine M., Godwin, Greg, Barney, Peter, Lawrence, Joseph R., Aldrich, Brian, Kilcer, Tom, Czymmek, Karl J., Gloy, Brent

“…Incorporation of spring-applied manure is known to reduce N volatilization losses and hence increase the N value of the manure. However, traditional…”
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Soil and Tissue Testing for Sulfur Management of Alfalfa in New York State by Ketterings, Quirine M, Godwin, Greg, Gami, Sanjay, Dietzel, Kevin, Lawrence, Joe, Barney, Peter, Kilcer, Tom, Stanyard, Mike, Albers, Carl, Cherney, Jerry H, Cherney, Debbie, Czymmek, Karl J

“…Alfalfa (Medicago sativa L.) is an important forage crop in New York. During the past decades, atmospheric S deposition has decreased, raising questions about…”
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Whole Farm Nutrient Balance Calculator for New York Dairy Farms by Soberon, Melanie A., Ketterings, Quirine M., Rasmussen, Caroline N., Czymmek, Karl J.

“…Nutrient loss and accumulation as well as associated environmental degradation have been a concern for animal agriculture for many decades. Federal and New…”
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Combining Spatial and Temporal Corn Silage Yield Variability for Management Zone Development by Kharel, Tulsi P., Maresma, Angel, Czymmek, Karl J., Oware, Erasmus K., Ketterings, Quirine M.

“…Precision agriculture requires an understanding of yield variability. The objectives of this study were to (i) document the temporal and spatial variability of…”
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Integrating Cover Crops for Nitrogen Management in Corn Systems on Northeastern U.S. Dairies by Ketterings, Quirine M., Swink, Sheryl N., Duiker, Sjoerd W., Czymmek, Karl J., Beegle, Douglas B., Cox, William J.

“…Northeastern U.S. (New York, Pennsylvania, and New England states) dairy farmers are increasingly interested in improving soil health, nutrient sequestration,…”
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Conservation tillage is compatible with manure injection in corn silage systems by Battaglia, Martin L., Ketterings, Quirine M., Godwin, Gregory, Czymmek, Karl J.

“…Adoption of conservation tillage practices has increased over the past 30 yr in the United States. Research is needed to evaluate if reduced tillage practices…”
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Impact of headland area on whole field and farm corn silage and grain yield by Sunoj, S., Kharel, Dilip, Kharel, Tulsi, Cho, Jason, Czymmek, Karl J., Ketterings, Quirine M.

“…Use of agricultural equipment on corn (Zea mays L.) fields can contribute to soil compaction, especially on headland (HL) areas where wheel traffic is more…”
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Soil Properties under Nitrogen‐ vs. Phosphorus‐Based Manure and Compost Management of Corn by Sadeghpour, Amir, Ketterings, Quirine M., Vermeylen, Francoise, Godwin, Gregory S., Czymmek, Karl J.

“…Core Ideas Annual application of manure to corn at P‐removal based rates will reduce P buildup over time. Lowering manure and compost rates over time will…”
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Under‐ or Over‐Application of Nitrogen Impact Corn Yield, Quality, Soil, and Environment by Sadeghpour, Amir, Ketterings, Quirine M., Godwin, Gregory S., Czymmek, Karl J.

“…Core Ideas Nitrogen application mid‐season cannot overcome drought stress later in the season. Except for crude protein, under‐application of N did not impact…”
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Evaluating Management Implications of the New York Phosphorus Index with Farm Field Information by Ros, Mart B. H., Ketterings, Quirine M., Cela, Sebastian, Czymmek, Karl J.

“…Phosphorus (P) loss from agricultural fields can contribute to water quality degradation. The current New York P index (NY‐PI) scores fields on the basis of P…”
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