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John E. Sawyer
John E. Sawyer
Professor
E-mailová adresa ověřena na: iastate.edu
Název
Citace
Citace
Rok
Integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept
MJ Castellano, KE Mueller, DC Olk, JE Sawyer, J Six
Global change biology 21 (9), 3200-3209, 2015
6872015
Concepts of variable rate technology with considerations for fertilizer application
JE Sawyer
Journal of Production Agriculture 7 (2), 195-201, 1994
3631994
Concepts and rationale for regional nitrogen rate guidelines for corn
J Sawyer, E Nafziger, G Randall, L Bundy, G Rehm, B Joern
3322006
Strengths and limitations of nitrogen rate recommendations for corn and opportunities for improvement
TF Morris, TS Murrell, DB Beegle, JJ Camberato, RB Ferguson, J Grove, ...
Agronomy journal 110 (1), 1-37, 2018
3302018
Modeling long-term corn yield response to nitrogen rate and crop rotation
LA Puntel, JE Sawyer, DW Barker, R Dietzel, H Poffenbarger, ...
Frontiers in plant science 7, 1630, 2016
1802016
Nitrogen application to soybean at early reproductive development
DW Barker, JE Sawyer
Agronomy journal 97 (2), 615-619, 2005
1762005
Maximum soil organic carbon storage in Midwest US cropping systems when crops are optimally nitrogen-fertilized
HJ Poffenbarger, DW Barker, MJ Helmers, FE Miguez, DC Olk, JE Sawyer, ...
PLoS One 12 (3), e0172293, 2017
1752017
General guide for crop nutrient and limestone recommendations in Iowa
JE Sawyer
Iowa State University, University Extension, 2002
1752002
Cover crop effects on nitrous oxide emissions: role of mineralizable carbon
DC Mitchell, MJ Castellano, JE Sawyer, J Pantoja
Soil Science Society of America Journal 77 (5), 1765-1773, 2013
1702013
Drought impact on crop production and the soil environment: 2012 experiences from Iowa
MM Al-Kaisi, RW Elmore, JG Guzman, HM Hanna, CE Hart, MJ Helmers, ...
Journal of Soil and Water Conservation 68 (1), 19A-24A, 2013
1672013
Using relative chlorophyll meter values to determine nitrogen application rates for corn
JA Hawkins, JE Sawyer, DW Barker, JP Lundvall
Agronomy Journal 99 (4), 1034-1040, 2007
1632007
A long‐term nitrogen fertilizer gradient has little effect on soil organic matter in a high‐intensity maize production system
KH Brown, EM Bach, RA Drijber, KS Hofmockel, ES Jeske, JE Sawyer, ...
Global change biology 20 (4), 1339-1350, 2014
1602014
Nitrogen fertilizer suppresses mineralization of soil organic matter in maize agroecosystems
NK Mahal, WR Osterholz, FE Miguez, HJ Poffenbarger, JE Sawyer, ...
Frontiers in Ecology and Evolution 7, 59, 2019
1492019
Corn nitrogen fertilization requirement and corn–soybean productivity with a rye cover crop
JL Pantoja, KP Woli, JE Sawyer, DW Barker
Soil Science Society of America Journal 79 (5), 1482-1495, 2015
1472015
Effect of nitrogen fertilizer application on growing season soil carbon dioxide emission in a corn–soybean rotation
MM Al‐Kaisi, ML Kruse, JE Sawyer
Journal of Environmental Quality 37 (2), 325-332, 2008
1472008
Understanding the DayCent model: Calibration, sensitivity, and identifiability through inverse modeling
M Necpálová, RP Anex, MN Fienen, SJ Del Grosso, MJ Castellano, ...
Environmental Modelling & Software 66, 110-130, 2015
1312015
Using active canopy sensors to quantify corn nitrogen stress and nitrogen application rate
DW Barker, JE Sawyer
Agronomy Journal 102 (3), 964-971, 2010
1252010
A general guide for crop nutrient and limestone recommendations in Iowa
A Mallarino, J Sawyer, S Barnhart
1222013
Use of anaerobically digested swine manure as a nitrogen source in corn production
ER Loria, JE Sawyer, DW Barker, JP Lundvall, JC Lorimor
Agronomy Journal 99 (4), 1119-1129, 2007
1222007
Statistical and machine learning methods evaluated for incorporating soil and weather into corn nitrogen recommendations
CJ Ransom, NR Kitchen, JJ Camberato, PR Carter, RB Ferguson, ...
Computers and electronics in agriculture 164, 104872, 2019
1192019
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Články 1–20