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John Spargo
John Spargo
Verifierad e-postadress på psu.edu
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Permanganate oxidizable carbon reflects a processed soil fraction that is sensitive to management
SW Culman, SS Snapp, MA Freeman, ME Schipanski, J Beniston, R Lal, ...
Soil Science Society of America Journal 76 (2), 494-504, 2012
7512012
Soil and water environmental effects of fertilizer-, manure-, and compost-based fertility practices in an organic vegetable cropping system
G Evanylo, C Sherony, J Spargo, D Starner, M Brosius, K Haering
Agriculture, ecosystems & environment 127 (1-2), 50-58, 2008
4672008
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
3272018
Overcoming weed management challenges in cover crop–based organic rotational no-till soybean production in the eastern United States
SB Mirsky, MR Ryan, JR Teasdale, WS Curran, CS Reberg-Horton, ...
Weed Technology 27 (1), 193-203, 2013
2932013
Conservation tillage issues: Cover crop-based organic rotational no-till grain production in the mid-Atlantic region, USA
SB Mirsky, MR Ryan, WS Curran, JR Teasdale, J Maul, JT Spargo, ...
Renewable Agriculture and Food Systems 27 (1), 31-40, 2012
2272012
Mineralizable soil nitrogen and labile soil organic matter in diverse long-term cropping systems
JT Spargo, MA Cavigelli, SB Mirsky, JE Maul, JJ Meisinger
Nutrient Cycling in Agroecosystems 90, 253-266, 2011
1432011
Biomass and nitrogen content of hairy vetch–cereal rye cover crop mixtures as influenced by species proportions
HJ Poffenbarger, SB Mirsky, RR Weil, JE Maul, M Kramer, JT Spargo, ...
Agronomy Journal 107 (6), 2069-2082, 2015
1262015
Soil fertility and plant nutrition
JM McGrath, J Spargo, CJ Penn
Plant Health, 166-184, 2014
1262014
Legume proportion, poultry litter, and tillage effects on cover crop decomposition
HJ Poffenbarger, SB Mirsky, RR Weil, M Kramer, JT Spargo, MA Cavigelli
Agronomy Journal 107 (6), 2083-2096, 2015
1202015
Soil carbon sequestration with continuous no-till management of grain cropping systems in the Virginia coastal plain
JT Spargo, MM Alley, RF Follett, JV Wallace
Soil and Tillage Research 100 (1-2), 133-140, 2008
1142008
Organic grain cropping systems to enhance ecosystem services
MA Cavigelli, SB Mirsky, JR Teasdale, JT Spargo, J Doran
Renewable agriculture and food systems 28 (2), 145-159, 2013
942013
Hairy vetch biomass across the eastern United States: Effects of latitude, seeding rate and date, and termination timing
SB Mirsky, VJ Ackroyd, S Cordeau, WS Curran, M Hashemi, ...
Agronomy Journal 109 (4), 1510-1519, 2017
902017
Biochar Application and Drought Stress Effects on Physiological Characteristics of Silybum marianum
R Keshavarz Afshar, M Hashemi, M DaCosta, J Spargo, A Sadeghpour
Communications in Soil Science and Plant Analysis 47 (6), 743-752, 2016
882016
Reduced‐tillage organic corn production in a hairy vetch cover crop
JR Teasdale, SB Mirsky, JT Spargo, MA Cavigelli, JE Maul
Agronomy journal 104 (3), 621-628, 2012
682012
Organic supplemental nitrogen sources for field corn production after a hairy vetch cover crop
JT Spargo, MA Cavigelli, SB Mirsky, JJ Meisinger, VJ Ackroyd
Agronomy Journal 108 (5), 1992-2002, 2016
552016
Repeated compost application effects on phosphorus runoff in the Virginia Piedmont
JT Spargo, GK Evanylo, MM Alley
Journal of Environmental Quality 35 (6), 2342-2351, 2006
472006
Illinois soil nitrogen test for prediction of fertilizer nitrogen needs of corn in Virginia
JT Spargo, MM Alley, WE Thomason, SM Nagle
Soil Science Society of America Journal 73 (2), 434-442, 2009
442009
Characterizing cereal rye biomass and allometric relationships across a range of fall available nitrogen rates in the eastern United States
SB Mirsky, JT Spargo, WS Curran, SC Reberg‐Horton, MR Ryan, ...
Agronomy Journal 109 (4), 1520-1531, 2017
432017
Cadmium phytoextraction by Helianthus annuus (sunflower), Brassica napus cv Wichita (rapeseed), and Chyrsopogon zizanioides (vetiver)
BJ Benavides, PJ Drohan, JT Spargo, SN Maximova, MJ Guiltinan, ...
Chemosphere 265, 129086, 2021
382021
Mineralization and N Fertilizer Equivalent Value of Composts as Assessed by Tall Fescue (Festuca arundinacea)
C Bowden, J Spargo, G Evanylo
Compost science & utilization 15 (2), 111-118, 2007
372007
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Artiklar 1–20