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Full-Text Articles in Life Sciences
Tillage Method And Glyphosate-Resistant Alfalfa Termination Timing Affect Soil Properties And Subsequent Corn Yield, Jason Clark, Matt A. Yost, Grant E. Cardon, Corey V. Ransom, J. Earl Creech
Tillage Method And Glyphosate-Resistant Alfalfa Termination Timing Affect Soil Properties And Subsequent Corn Yield, Jason Clark, Matt A. Yost, Grant E. Cardon, Corey V. Ransom, J. Earl Creech
Agronomy, Horticulture and Plant Science Faculty Publications
Application of glyphosate [N-(phosphonomethyl) glycine]-containing herbicides and tillage, alone or in combination, has been the standard for removing declining alfalfa (Medicago sativa L.) stands. With glyphosate no longer an option to control glyphosate-resistant alfalfa, different termination strategies are needed. Field studies across four site-years in Utah evaluated the effect of tillage type and timing (fall conventional till, spring conventional till, fall strip-till, spring strip-till, and no-till) and herbicide timing (fall, spring, in-crop, and no herbicide) of 2,4-D (2,4- dichlorophenoxyacetic acid) and dicamba (3,6-dichloro-2-methoxybenzoic acid) on penetration resistance, alfalfa regrowth, corn (Zea mays L.) emergence rate, and silage corn yield. Across …
Weather And Soil In The Us Midwest Influence The Effectiveness Of Single-And Split-Nitrogen Applications In Corn Production, Jason Clark, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan
Weather And Soil In The Us Midwest Influence The Effectiveness Of Single-And Split-Nitrogen Applications In Corn Production, Jason Clark, Fabian G. Fernandez, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, John E. Sawyer, John F. Shanahan
Agronomy, Horticulture and Plant Science Faculty Publications
Splitting the N application into two or more timings may improve corn (Zea mays L.) grain yield and N recovery relative to a single-N application. A 49 site-year study across eight U.S. Midwestern states compared the effect of an at-planting (single-N application) and two split-N applications [45 (45+SD) or 90 kg N ha−1 (90+SD) at planting with the remainder of the total rate (180 or 270 kg N ha−1) applied at V9]. For split-N applications, soil and plant responses were similar between 45+SD and 90+SD 93–98% of the time, indicating the at-planting N rate of 45 kg N ha−1 may …
Spring‐Applied Corn Herbicides Impact Fall‐Planted Cover Crops In South Dakotaa, Sydney Pridlie, S. A. Clay, G. Shaffer
Spring‐Applied Corn Herbicides Impact Fall‐Planted Cover Crops In South Dakotaa, Sydney Pridlie, S. A. Clay, G. Shaffer
Agronomy, Horticulture and Plant Science Faculty Publications
Early spring herbicide applications can have residuals that impede fall‐planted cover crop growth. A greenhouse study examined radish (Raphanus sativus L.) or rye (Secale cereale L.) growth in silty clay loam (southeastern South Dakota) and silt loam (north‐central South Dakota) where corn herbicides had been applied about 120 d prior to collection. S‐metolachlor, acetochlor, flumetsulam, metribuzin, bicyclopyrone + mesotrione + S‐metolachlor + atrazine, and primisulfuron‐methyl + prosulfuron (northern site only) were applied at the suggested timing and highest recommended rate and planted to corn (Zea mays L.). Two 11‐cm diam. soil cores to a 10‐cm …
Organic Fertilizer Abrasive Grits Increase Soil Available Nitrogen, Plant Height, And Biomass, Michael Carlson, Frank Forcella, Sam Wortman, David Clay, Sharon A. Clay
Organic Fertilizer Abrasive Grits Increase Soil Available Nitrogen, Plant Height, And Biomass, Michael Carlson, Frank Forcella, Sam Wortman, David Clay, Sharon A. Clay
Agronomy, Horticulture and Plant Science Faculty Publications
In organic cropping systems, air‐propelled abrasive grits can be used to control in‐row weeds. If the applied abrasive grit is an approved organic fertilizer, these applications may serve a dual purpose of weed control and crop fertility. Laboratory soil incubations examined the N mineralization rates of several grit types with differing C/N ratios (Agra Grit [crushed walnut shells, 170:1], corncob grit [91:1], Sustane [composted turkey litter, 5.0:1], Phytaboost Plant Food [crushed and pelletized soybean meal, 5.0:1]). A greenhouse study determined plant wheat (Triticum aestivum L.), kale (Brassica napus pabluaria DC), and velvetleaf (Abutilon theophrasti Medik.) growth response …
An Examination Of Best Practices For Survey Research With Agricultural Producers, Edem Avemegah, Wei Gu, Abdelrahim Abulbasher, Kristen Koci, Ayorinde Ogunyiola, Joyce Eduful, Shuang Li, Kylie Barington, Tong Wang, Deepthi Kolady, Lora Perkins, A. Joshua Leffler, Peter Kovacs, Jason Clark, David Clay, Jessica D. Ulrich-Schad
An Examination Of Best Practices For Survey Research With Agricultural Producers, Edem Avemegah, Wei Gu, Abdelrahim Abulbasher, Kristen Koci, Ayorinde Ogunyiola, Joyce Eduful, Shuang Li, Kylie Barington, Tong Wang, Deepthi Kolady, Lora Perkins, A. Joshua Leffler, Peter Kovacs, Jason Clark, David Clay, Jessica D. Ulrich-Schad
Agronomy, Horticulture and Plant Science Faculty Publications
To improve the economic and environmental sustainability of agriculture, information is needed on how to target research, teaching, and outreach programs. However, conducting survey research in general, and with agricultural producers specifically, is increasingly challenging given issues such as declining response rates and limited resources. While studies examining the best practices for promoting higher response rates exist, few focus explicitly on agricultural producers. In three separate surveys conducted with agricultural producers in South Dakota in 2018 and 2019, we included experiments testing how token pre-incentives, a research partnership, and response mode options impacted response rates. We also examined how sample …
Teosinte (Zea Mays Ssp Parviglumis) Growth And Transcriptomic Response To Weed Stress Identifies Similarities And Differences Between Varieties And With Modern Maize Varieties, S. A. Bruggeman, D. P. Horvath, A. Y. Fennell Dr, J. A. Gonzalez-Hernandez, S. A. Clay
Teosinte (Zea Mays Ssp Parviglumis) Growth And Transcriptomic Response To Weed Stress Identifies Similarities And Differences Between Varieties And With Modern Maize Varieties, S. A. Bruggeman, D. P. Horvath, A. Y. Fennell Dr, J. A. Gonzalez-Hernandez, S. A. Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Transcriptomic responses of plants to weed presence gives insight on the physiological and molecular mechanisms involved in the stress response. This study evaluated transcriptomic and morphological responses of two teosinte (Zea mays ssp parviglumis) (an ancestor of domesticated maize) lines (Ames 21812 and Ames 21789) to weed presence and absence during two growing seasons. Responses were compared after 6 weeks of growth in Aurora, South Dakota, USA. Plant heights between treatments were similar in Ames 21812, whereas branch number decreased when weeds were present. Ames 21789 was 45% shorter in weedy vs weed-free plots, but branch numbers were similar between …
Soil-Nitrogen, Potentially Mineralizable-Nitrogen, And Field Condition Information Marginally Improves Corn Nitrogen Management, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Soil-Nitrogen, Potentially Mineralizable-Nitrogen, And Field Condition Information Marginally Improves Corn Nitrogen Management, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Agronomy, Horticulture and Plant Science Faculty Publications
Anaerobic potentially mineralizable nitrogen (PMN) combined with preplant nitrate test (PPNT) or pre-sidedress nitrate test (PSNT) may improve corn (Zea mays L.) N management. Forty-nine corn N response studies were conducted across the U.S. Midwest to evaluate the capacity of PPNT and PSNT to predict grain yield, N uptake, and economic optimal N rate (EONR) when adjusted by soil sampling depth, soil texture, temperature, PMN, and initial NH4–N from PMN analysis. Pre-plant soil samples were obtained for PPNT (0- to 30-, 30- to 60-, 60- to 90-cm depths) and PMN (0- to 30-cm depth) before corn planting and N fertilization. …
Adjusting Corn Nitrogen Management By Including A Mineralizable-Nitrogen Test With The Preplant And Presidedress Nitrate Tests, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Adjusting Corn Nitrogen Management By Including A Mineralizable-Nitrogen Test With The Preplant And Presidedress Nitrate Tests, Jason Clark, Fabian G. Fernandez, Kristen S. Veum, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Newell R. Kitchen, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Agronomy, Horticulture and Plant Science Faculty Publications
The anaerobic potentially mineralizable N (PMN) test combined with the preplant (PPNT) and presidedress (PSNT) nitrate tests may improve corn (Zea mays L.) N fertilization predictions. Forty-nine corn N response experiments (mostly corn following soybean [Glycine max (L.) Merr.]) were conducted in the U.S. Midwest from 2014–2016 to evaluate the ability of the PPNT and PSNT to predict corn relative yield (RY) and N fertilizer over- and under-application rates when adjusted by PMN. Before planting and N fertilization, PPNT (0–30, 30–60, and 60–90 cm) and PMN (0–30 cm) samples were obtained. In-season soil samples were obtained at the …
Soil Sample Timing, Nitrogen Fertilization, And Incubation Length Influence Anaerobic Potentially Mineralizable Nitrogen, Jason Clark, Kristen S. Veum, Fabian G. Fernandez, Newell R. Kitchen, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Soil Sample Timing, Nitrogen Fertilization, And Incubation Length Influence Anaerobic Potentially Mineralizable Nitrogen, Jason Clark, Kristen S. Veum, Fabian G. Fernandez, Newell R. Kitchen, James J. Camberato, Paul R. Carter, Richard B. Ferguson, David W. Franzen, Daniel E. Kaiser, Carrie A.M. Laboski, Emerson D. Nafziger, Carl J. Rosen, John E. Sawyer, John F. Shanahan
Agronomy, Horticulture and Plant Science Faculty Publications
Understanding the variables that affect the anaerobic potentially mineralizable N (PMNan) test should lead to a standard procedure of sample collection and incubation length, improving PMNan as a tool in corn (Zea mays L.) N management. We evaluated the effect of soil sample timing (preplant and V5 corn development stage [V5]), N fertilization (0 and 180 kg ha−1) and incubation length (7, 14, and 28 d) on PMNan (0–30 cm) across a range of soil properties and weather conditions. Soil sample timing, N fertilization, and incubation length affected PMNan differently based on soil and weather conditions. Preplant vs. V5 PMNan …
Water Deficit Transcriptomic Responses Differ In The Invasive Tamarix Chinensis And T. Ramosissima Established In The Southern And Northern United States, Padmapriya Swaminathan, Michelle K. Ohrtman, Abigail Carinder, Anup Deuja, Cankun Wang, John Gaskin, Anne Fennell, Sharon Clay
Water Deficit Transcriptomic Responses Differ In The Invasive Tamarix Chinensis And T. Ramosissima Established In The Southern And Northern United States, Padmapriya Swaminathan, Michelle K. Ohrtman, Abigail Carinder, Anup Deuja, Cankun Wang, John Gaskin, Anne Fennell, Sharon Clay
Agronomy, Horticulture and Plant Science Faculty Publications
Tamarix spp. (saltcedar) were introduced from Asia to the southern United States as windbreak and ornamental plants and have spread into natural areas. This study determined differential gene expression responses to water deficit (WD) in seedlings of T. chinensis and T. ramosissima from established invasive stands in New Mexico and Montana, respectively. A reference de novo transcriptome was developed using RNA sequences from WD and well-watered samples. Blast2GO analysis of the resulting 271,872 transcripts yielded 89,389 homologs. The reference Tamarix (Tamaricaceae, Carophyllales order) transcriptome showed homology with 14,247 predicted genes of the Beta vulgaris subsp. vulgaris (Amaranthaceae, Carophyllales order) genome …
Planting Date, Cultivar, Seed Treatment, And Seeding Rate Effects On Soybean Growth And Yield, Thandiwe Nleya, Matthew Schutte, David Clay, Graig Reicks, Nathan Mueller
Planting Date, Cultivar, Seed Treatment, And Seeding Rate Effects On Soybean Growth And Yield, Thandiwe Nleya, Matthew Schutte, David Clay, Graig Reicks, Nathan Mueller
Agronomy, Horticulture and Plant Science Faculty Publications
Soybean [Glycine max (L.) Merr.] yield is a function of many factors including genetic attributes of the cultivar, environmental conditions, and management practices. Temporally variable weather patterns in North America, especially in the northern Great Plains, have resulted in the re-examination of how spring production practices interact with the environmental conditions to influence yield. This study evaluated the impact of four plantings dates, four seeding rates, and two soybean maturity groups (MGs) using treated and untreated (control) seed on soybean growth, seed yield, and composition. The study was conducted at Volga, SD, in 2014, 2015, and 2016. The planting …