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Authors Schepers, J.S. Remove constraint Schepers, J.S.: Schepers, J.S. Subjects Zea mays Remove constraint Zea mays: Zea mays
Displaying items 1 - 10 of 37 start over

1. Ability for In-Season Correction of Nitrogen Deficiency in Corn Using Chlorophyll Meters

Description:
Includes references
Author:
Varvel, G.E. , Schepers, J.S. , Francis, D.D.
Subject:
meters (equipment) , Zea mays , nutrient deficiencies , soil nutrients , nitrogen , plant nutrition , chlorophyll , fertilizer application , fertilizer requirements , growing season , monitoring , grain yield , crop rotation , hybrids , nutrient management
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1997

2. Aerial photography to detect nitrogen stress in corn

Description:
Includes references
Author:
Blackmer, T.M. , Schepers, J.S.
Subject:
Zea mays , corn , plant nutrition , soil nutrients , nitrogen , nitrates , grain yield , aerial photography , nitrogen fertilizers , fertilizer application
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1996

3. Agronomic responses of corn hybrids from different eras to deficit and adequate levels of water and nitrogen

Description:
Includes references
Author:
O'Neill, P.M. , Shanahan, J.F. , Schepers, J.S. , Caldwell, B.
Subject:
Zea mays , corn , hybrids , grain yield , agronomic traits , plant-water relations , water stress , soil water deficit , nitrogen , soil fertility , nutrient availability , genotype-environment interaction , nutrition-genotype interaction , Nebraska
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

4. Ammonia exchange from corn foliage during reproductive growth

Description:
Includes references
Author:
Francis, D.D. , Schepers, J.S. , Sims, A.L.
Subject:
Zea mays , ammonia , leaves , flowering , isotope labeling , gas exchange , corn ears , metabolism , isotopes , diurnal variation , ammonium nitrogen , stems , corn cobs , roots , growing media
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1997

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

Description:
Includes references
Author:
Varvel, G.E. , Wilhelm, W.W. , Shanahan, J.F. , Schepers, J.S.
Subject:
Zea mays , corn , nitrogen , plant nutrition , nitrogen fertilizers , fertilizer requirements , nutrient use efficiency , chlorophyll , grain yield , cropping systems , cultivars , chemical constituents of plants , Nebraska
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2007

6. Analysis of aerial photography for nitrogen stress within corn fields

Description:
Includes references
Author:
Blackmer, T.M. , Schepers, J.S. , Varvel, G.E. , Meyer, G.E.
Subject:
Zea mays , nitrogen fertilizers , nutrient availability , soil heterogeneity , aerial photography , nitrogen , nutrient deficiencies , crop yield , correlation , application rate , fertilizer requirements , variable rate application
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1997

7. Appropriateness of management zones for characterizing spatial variability of soil properties and irrigated corn yields across years

Description:
Includes references
Author:
Schepers, A.R. , Shanahan, J.F. , Liebig, M.A. , Schepers, J.S. , Johnson, S.H. , Luchiari, A. Jr.
Subject:
Zea mays , corn , landscapes , irrigated conditions , soil pH , electrical conductivity , phosphorus , soil nutrients , nutrient content , soil organic matter , spatial variation , grain yield , yield monitoring , yield mapping , growing season , temporal variation , precipitation , dry season , wet season , aerial photography , digital images
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
2004

8. Chlorophyll meter and stalk nitrate techniques as complementary indices for residual nitrogen

Description:
Includes references
Author:
Varvel, G.E. , Schepers, J.S. , Francis, D.D.
Subject:
Zea mays , Glycine max , continuous cropping , crop rotation , nitrogen fertilizers , optimization , residual effects , soil , nitrogen content , stems , nitrate nitrogen , chlorophyll , nitrogen , nutrient availability , hybrids , application rate , fertilizer requirements , chemical constituents of plants , Nebraska
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1997

9. Chlorophyll meter readings in corn as affected by plant spacing

Description:
Includes references
Author:
Blackmer, T.M. , Schepers, J.S. , Vigil, M.F.
Subject:
meters (equipment) , Zea mays , plant density , chlorophyll , measurement , crop yield , nitrogen content , application rate , grains , anhydrous ammonia
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1993

10. Comparison of corn leaf nitrogen concentration and chlorophyll meter readings

Description:
In the Special Issue: International symposium on soil testing and plant analysis in the global community. Paper presented at the second international symposium, August 22-27, 1991, Orlando, Florida.
Author:
Schepers, J.S. , Francis, D.D. , Vigil, M. , Below, F.E.
Subject:
Zea mays , hybrids , leaves , nitrogen , nutrient content , chlorophyll , measurement , nutritional status
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Year:
1992