Proceedings :: North Central Soil Fertility Conference

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Joseph, L

Dobermann, A

Tjentland, B

Martin, K.L

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Authors

Hodgen, P.J

Raun, W.R

Johnson, G.V

Teal, R.K

Freeman, K.W

Martin, K.L

Shanahan, J.F

Schepers, J.S

Tjentland, B

Carlson, G

Wingeyer, A.B

Walters, D

Casseman, K

Dobermann, A

van Es, H.M

Melkonian, J.J

Moebius-Clune, B.N

DeGaetano, A.T

Joseph, L

Topics

Type

Oral

Year

2003

2006

2011

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Filter results4 paper(s) found.
1. Relationship Between Response Indices Measured In-Season and at Harvest in Winter Wheat Current methods for making nitrogen recommendations in winter wheat (Triticum aestivurn L.) do not adjust for in-season temporal variability of plant available non-fertilizer nitrogen (N) sources. The purpose of this study was to compare the use of different nitrogen response indices determined in-season @INDVI and RIPLANTHEIGkm) to the nitrogen response index measured at harvest (RIHARvEST). In addition, this study evaluated the use of the in-season response indices for determining topdress nitrogen... Download paper
2. The Analysis of Nitrogen and Plant Population Interactions Nitrogen and plant population are significant factors for corn production. Accurate nitrogen fertilizer and seeding rate recommendations are essential for optimizing profitability for the fmer and minimizing nitrogen losses. Research and development of yield response curves provide important information that can be used to understand the relationships between these inputs (nitrogen fertilizer and corn seeds) and output (grain yield). Over the varying levels of inputs. yield response functions can... Download paper
3. Cropping Systems Management Effects on Soil N Mineralization Dynamics Changes in soil organic matter (SOM) content due to cultivation also impacts the amount of indigenous soil nitrogen (IN) supply. Crop management practices designed to achieve high yields also result in high residue inputs, which can contribute to SOM build up and enhanced indigenous N supply. The objective of this study was to evaluate the long term effect of crop rotation and nutrient management in conventional and intensive maize based systems on the change in soil N supply. Soil samples fiotn... Download paper
4. Adapt-N: A Computational Tool for Precise N Management in Corn Current approaches to estimation of optimum N fertilizer rates are based on mass balances, average expected economic return based on field experiments, soil N tests, an d crop leaf or canopy sensing. However, denitrification and leaching losses of nitrogen may occur from dynamic and complex interactions among weather, soil hydrology, crop water and N uptake, and management practices , and result in high variability in annual crop N needs in maize ( Zea mays L.) production. W eather impacts the soil... Download paper

Filter results4 paper(s) found.

1. Relationship Between Response Indices Measured In-Season and at Harvest in Winter Wheat

Current methods for making nitrogen recommendations in winter wheat (Triticum aestivurn L.) do not adjust for in-season temporal variability of plant available non-fertilizer nitrogen (N) sources. The purpose of this study was to compare the use of different nitrogen response indices determined in-season @INDVI and RIPLANTHEIGkm) to the nitrogen response index measured at harvest (RIHARvEST). In addition, this study evaluated the use of the in-season response indices for determining topdress nitrogen...

Download paper

2. The Analysis of Nitrogen and Plant Population Interactions

Nitrogen and plant population are significant factors for corn production. Accurate nitrogen fertilizer and seeding rate recommendations are essential for optimizing profitability for the fmer and minimizing nitrogen losses. Research and development of yield response curves provide important information that can be used to understand the relationships between these inputs (nitrogen fertilizer and corn seeds) and output (grain yield). Over the varying levels of inputs. yield response functions can...

Download paper

3. Cropping Systems Management Effects on Soil N Mineralization Dynamics

Changes in soil organic matter (SOM) content due to cultivation also impacts the amount of indigenous soil nitrogen (IN) supply. Crop management practices designed to achieve high yields also result in high residue inputs, which can contribute to SOM build up and enhanced indigenous N supply. The objective of this study was to evaluate the long term effect of crop rotation and nutrient management in conventional and intensive maize based systems on the change in soil N supply. Soil samples fiotn...

Download paper

4. Adapt-N: A Computational Tool for Precise N Management in Corn

Current approaches to estimation of optimum N fertilizer rates are based on mass balances, average expected economic return based on field experiments, soil N tests, an d crop leaf or canopy sensing. However, denitrification and leaching losses of nitrogen may occur from dynamic and complex interactions among weather, soil hydrology, crop water and N uptake, and management practices , and result in high variability in annual crop N needs in maize ( Zea mays L.) production. W eather impacts the soil...

Download paper