Zobrazeno 1 - 10
of 165
pro vyhledávání: '"James S. Schepers"'
Autor:
Newell R. Kitchen, Curtis J. Ransom, James S. Schepers, Jerry L. Hatfield, Raymond Massey, Scott T. Drummond
Publikováno v:
PLoS ONE, Vol 17, Iss 5 (2022)
For maize (Zea mays L.), nitrogen (N) fertilizer use is often summarized from field to global scales using average N use efficiency (NUE). But expressing NUE as averages is misleading because grain increase to added N diminishes near optimal yield. T
Externí odkaz:
https://doaj.org/article/161f6fbda62e480e80b79ebcc32e6053
Autor:
Christos D. Tsadilas, M. Glampedakis, Nicholas Dercas, T. Nikoli, Stamatis Stamatiadis, A. Glampedakis, James S. Schepers, Eleftherios Evangelou
Publikováno v:
Precision Agriculture. 21:1008-1026
Improved genetics and better management have increased maize productivity, but often at the expense of excess water and N fertilizer. Environmental concerns have prompted the development of precision technologies and associated management strategies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7423c95749bb0df4e7e46909a922ac1c
https://doi.org/10.1007/s11119-019-09705-2
https://doi.org/10.1007/s11119-019-09705-2
Autor:
Eleftherios Evangelou, James S. Schepers, Christos D. Tsadilas, A. Glampedakis, Eleftheria Tsadila, Stamatis Stamatiadis, N. Tserlikakis, M. Glampedakis, Nicholas Dercas
Publikováno v:
Precision Agriculture. 21:695-712
Spatial crop nitrogen (N) management has advanced over the years by using canopy reflectance data to make N recommendations. But the value of an automated system for variable-rate applications (VRA) has not been extensively demonstrated in cotton. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01cf290f01579cf5a108b044c5c9d70b
https://doi.org/10.1007/s11119-019-09690-6
https://doi.org/10.1007/s11119-019-09690-6
Autor:
James S. Schepers, Timothy M. Shaver, Juan Pablo Garcia Montealegre, Richard B. Ferguson, Charles S. Wortmann
Publikováno v:
Agronomy Journal. 111:2453-2461
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d46cd97eb7a433b80a26611f72b9ca9a
https://doi.org/10.2134/agronj2019.02.0073
https://doi.org/10.2134/agronj2019.02.0073
Autor:
Juan Pablo Garcia Montealegre, Richard Little, Richard B. Ferguson, Charles S. Wortmann, Timothy M. Shaver, James S. Schepers
Publikováno v:
Nutrient Cycling in Agroecosystems. 114:225-235
The fertilizer N equivalent (FNE) value of applied organic N (OrgN) is poorly predicted, often resulting in over-application of fertilizer N. Research was conducted for irrigated, continuous-corn (Zea mays L.) in eastern Nebraska with three rates of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abac111a1fc84d5c400fff600a5cc591
https://doi.org/10.1007/s10705-019-10003-6
https://doi.org/10.1007/s10705-019-10003-6
Publikováno v:
Sensing Approaches for Precision Agriculture ISBN: 9783030784300
Maximum genetically possible crop growth and yield are inhibited by abiotic and or biotic stresses. Biotic stresses may include pests, insects or disease infestations whereas abiotic stress includes nutritional deficiencies. Sensors have been develop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0f8e02ff4632eeac94884ed62653a22
https://doi.org/10.1007/978-3-030-78431-7_6
https://doi.org/10.1007/978-3-030-78431-7_6
Autor:
James J. Camberato, Richard B. Ferguson, Peter C. Scharf, James S. Schepers, Emerson D. Nafziger, David W. Franzen, Gregory Mac Bean, John E. Sawyer, Fabián G. Fernández, J. S. Shanahan, Newell R. Kitchen, Carrie A. M. Laboski
Publikováno v:
Agronomy Journal. 110:2552-2565
Uncertainty exists with corn (Zea mays L.) N management due to year-to-year variation in crop N need, soil N supply, and N loss from leaching, volatilization, and denitrification. Active-optical reflectance sensing (AORS) has proven effective in some
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d6ec8917375b3fea9d2a733f99a8140
https://doi.org/10.2134/agronj2018.03.0217
https://doi.org/10.2134/agronj2018.03.0217
Autor:
Loren J. Giesler, Charles A. Shapiro, Maxwel C. Oliveira, Nicholas J. Arneson, James S. Schepers, Kent M. Eskridge, Joshua J. Miller
Publikováno v:
Field Crops Research. 216:22-31
Canopy reflectance has been used in crops, such as corn and wheat, to assess crop status and direct in-season management practices, but less research has focused on using canopy reflectance in soybean research and production. In this study, soybean c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77a9620bbf56180a10a23488cbc4ce9f
https://doi.org/10.1016/j.fcr.2017.11.006
https://doi.org/10.1016/j.fcr.2017.11.006
Autor:
James S. Schepers
Publikováno v:
Precision Agriculture. 20:1-3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d45faf78cc38a46f3cfb1e7d449bb3b
https://doi.org/10.1007/s11119-018-09627-5
https://doi.org/10.1007/s11119-018-09627-5
Autor:
M. Glampedakis, Nicholas Dercas, Nikolaos V. Spyropoulos, A. Glampedakis, Stamatis Stamatiadis, James S. Schepers, Christos D. Tsadilas, Nicolas R. Dalezios, Eleftherios Evangelou, Kent M. Eskridge
Publikováno v:
Precision Agriculture
Variable-rate application (VRA) addresses in-field variation in soil nitrogen (N) availability and crop response, and as such is a tool for more effective site-specific management. This study assessed the performance of a VRA system for on-the-go del
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b3b426b639527ba5298c885ba670ee5
https://doi.org/10.1007/s11119-017-9540-7
https://doi.org/10.1007/s11119-017-9540-7