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  • 1
    Online Resource
    Online Resource
    Warm‐season forage options in Northern Dryland Regions
    Wiley ; 2020
    In:  Agronomy Journal Vol. 112, No. 5 ( 2020-09), p. 3239-3253
    Details
    In: Agronomy Journal, Wiley, Vol. 112, No. 5 ( 2020-09), p. 3239-3253
    Abstract: Rotating summer fallow with wheat ( Triticum spp.) is done in dryland grain farming at upper latitudes to stabilize yields over time and to prevent crop failure. However, summer fallow is costly since weeds must be controlled and crops are not grown. Replacing summer fallow with grain crops can generate low economic returns. Previous research indicated that annual cool‐season forages can be substituted for summer fallow in dryland cropping systems. Our objective was to determine if annual warm‐season species were suited for forage production in monocultures and polycultures in the U.S. northern Great Plains. Dry matter (DM) production by 20 warm‐ and cool‐season crop monocultures and 4 polycultures was determined across six environments during 2016, and by 25 warm‐ and cool‐season crop monocultures and polycultures across four environments from 2016 through 2018. Maize ( Zea mays L.) monoculture produced forage DM in amounts equal to, or greater than, those produced by other warm‐ and cool‐season crop treatments ( P   〈  0.05). Maize DM production averaged 2.5 to 5.7 Mg ha −1 , depending on the study and environment. Sorghum ( Sorghum bicolor L.), foxtail millet [ Setaria italica (L.) P. Beauv.] and sunflower ( Helianthus annuus L.) also produced relatively large amounts of forage DM. Polycultures failed to produce more DM than monocultures consistently ( P   〉  0.40). These results indicate that maize and other warm‐season crops are adapted for dryland forage production in cool regions at upper latitudes. Additional research is needed to determine the impacts of annual warm‐season forages on grain yield in a forage‐wheat crop sequence.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Issue
    URL: Article
    DOI: 10.1002/agj2.v112.5
    DOI: 10.1002/agj2.20261
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 1471598-3
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  • 2
    Online Resource
    Online Resource
    Productivity and Stability of Multi‐Species Cover Crop Mixtures in the Northern Great Plains
    Wiley ; 2019
    In:  Agronomy Journal Vol. 111, No. 4 ( 2019-07), p. 1817-1827
    Details
    In: Agronomy Journal, Wiley, Vol. 111, No. 4 ( 2019-07), p. 1817-1827
    Abstract: Multi species cover crops provided more stable biomass yield than single species. Grass components of cover crop mixtures were more productive than legume components. Cover crop mixtures did not use water or nitrogen differently than single species cover crops. Warm and cool season species within a functional group complemented each other. Relative LER was useful criteria to select cover crops for mixture construction. Mixed species cover crops are a relatively recent crop management method for improving soil health and cropping system sustainability. This 2‐yr study assessed the productivity and stability of cover crop mixtures with multi‐species functional groups compared with single species cover crops. Selection criteria were developed to identify suitable cover crops for a semiarid region. The study was conducted in south‐central Montana and evaluated 11 cover crop treatments which consisted of six individual species, four mixtures of these species, and a chemical‐fallow check. Biomass of cover crop mixtures was greater than single species cover crops in 2014 ( p = 0.04). However, land equivalent ratio (LER) showed that cover crop mixtures did not over‐yield single species cover crops (LER ≤ 1). Cover crop mixture productivity increased where grass and taproot species were included. In contrast mixtures with legumes resulted in low overall productivity. Coefficient of variability (CV) of the functional groups was in the order of 62% 〉 51% 〉 33% for grass, taproot, and legume, respectively. Spring soil NO 3 –N and soil water content following cover crop mixtures were not different from single species cover crops ( p 〉 0.05) in both years. Cover crops that produced greater biomass generally consumed more nitrogen and water. Identifying single species or mixtures with stable but acceptable biomass yield that leave greater water and soil nitrogen for the following crop is more important than maximizing biomass productivity. Species with relative LER ≥ 1 performed well within a mixture and provided a useful criterion for mixture construction.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj2018.03.0173
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1471598-3
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  • 3
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    Tillage and Rotation Effects on Corn Yield Response to Fertilizer Nitrogen on Aqualf Soils
    Wiley ; 1995
    In:  Agronomy Journal Vol. 87, No. 3 ( 1995-05), p. 409-415
    Details
    In: Agronomy Journal, Wiley, Vol. 87, No. 3 ( 1995-05), p. 409-415
    Abstract: Fertilizer N recommendations are often increased for no‐till corn ( Zea mays L.) relative to conventionally tilled corn. A comparison of relative yield responses to fertilizer N is lacking for continuous corn and corn following soybean [ Glycine max (L.) Merr.] when grown with conventional and no‐tillage systems on poorly drained claypan soils. Field studies spanning 5 site‐years were conducted on somewhat poorly (Udollic Ochraqualf) and poorly (Mollic Albaqualf) drained claypan soils in central and northeast Missouri. The experimental design was a split‐split plot, where whole plots were tillage system (chisel‐disk and no‐till) and subplots were rotation (continuous corn and corn following soybean). Subsubplots were N rates of 0, 67, 135, 202, and 269 kg ha −1 , applied preplant as either anhydrous NH 3 (82‐0‐0 N‐P‐K) or knife‐injected urea‐ammonium nitrate (UAN) solution (32‐0‐0). Corn grain yield response to fertilizer N was described by quadratic and quadraticplateau models that had similar R 2 values. With continuous corn, both models predicted no‐till to require 14 to 17 kg ha −1 (5–7%) less fertilizer N for maximum yield and profit than the chisel‐disk system. The predicted maximum no‐till grain yield was 0.34 Mg ha −1 less than the chisel‐disk system. No‐till corn following soybean required an average additional 17 kg N ha −1 (8%) for maximum yield (quadratic model) and 45 kg N ha −1 (35%) for maximum profit (quadratic‐plateau) than the chisel‐disk system. The average maximum yield for no‐till corn following soybean was 0.20 Mg ha −1 less than the chisel‐disk system. Apparent N credit for corn following soybean varied from 0 to 159 kg ha −1 . With the quadratic model, the average N credit was 54 kg ha −1 for the chisel‐disk system and 24 kg ha −1 for no‐till. Decreased no‐till corn yields that required equal or greater fertilizer N indicate at least a short‐term economic disadvantage for this tillage system on these poorly drained soils.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj1995.00021962008700030004x
    Language: English
    Publisher: Wiley
    Publication Date: 1995
    detail.hit.zdb_id: 1471598-3
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  • 4
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    Online Resource
    Calibration and Validation of ADAPT and SWAT for Field‐Scale Runoff Prediction 1
    Wiley ; 2007
    In:  JAWRA Journal of the American Water Resources Association Vol. 43, No. 4 ( 2007-08), p. 899-910
    Details
    In: JAWRA Journal of the American Water Resources Association, Wiley, Vol. 43, No. 4 ( 2007-08), p. 899-910
    Abstract: Abstract:  The pollutant reduction possible with a given agricultural best‐management practice (BMP) is complex and site‐specific. Water‐quality models can evaluate BMPs, but model results are often limited by the lack of calibrated parameters for a given BMP. This study calibrated runoff prediction of two models (ADAPT and SWAT) for individual field plots having one till and two no‐till management practices. The factors used for runoff calibration were curve number II (CN II ) and saturated hydraulic conductivity (Ksat) for ADAPT, and CN II , Ksat, and available water capacity for SWAT. Results were evaluated using coefficient of determination ( R 2 ), Nash‐Sutcliffe efficiency ( E f ), root‐mean square error, median‐based E f , and sign tests. Results indicated that for ADAPT, the best‐fit CN II was 66 for the NT/SB (no‐till plot with surface‐broadcast fertilizer) treatment, 68 for the NT/DB (no‐till with deep‐banded fertilizer) treatment, and 70 for the tilled plot, whereas for SWAT the best‐fit CN II was much higher, 86, for all treatments. Neither agreed with the textbook CN II , 78, for sorghum in silty clay loam soil. The best‐fit model parameters for both runoff calibration phases had excellent correlation to monthly totals and moderate correlation to individual events.
    Type of Medium: Online Resource
    ISSN: 1093-474X , 1752-1688
    URL: Issue
    URL: Article
    DOI: 10.1111/jawr.2007.43.issue-4
    DOI: 10.1111/j.1752-1688.2007.00061.x
    Language: English
    Publisher: Wiley
    Publication Date: 2007
    detail.hit.zdb_id: 2090051-X
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Impact of Tillage, Irrigation Method, and Nitrogen Rate on Sugar Beet Productivity
    Wiley ; 2014
    In:  Agronomy Journal Vol. 106, No. 5 ( 2014-09), p. 1717-1721
    Details
    In: Agronomy Journal, Wiley, Vol. 106, No. 5 ( 2014-09), p. 1717-1721
    Abstract: Strip tillage has gained adoption in recent years with the availability of improved tillage equipment that can prepare a seedbed and place fertilizer in one tillage pass. Nitrogen management, including optimal N rates and placement, is an important concern for sugar beet ( Beta vulgaris L.) growers. A 2‐yr study was conducted at Huntley, MT, under flood and sprinkler irrigation to determine if N rates should be adjusted for different tillage and irrigation systems, and to determine if N placement improved sugar beet root yield and quality. Three tillage treatments were compared: conventional tillage with fertilizer broadcast (CT); strip tillage with fertilizer broadcast (ST); and strip tillage with fertilizer banded (SN). Five N rates were randomly applied to plots within each tillage treatment. Check plots were included each year to verify a response to applied N. Averaged over 2 yr, root yield was 3 Mg ha −1 higher under flood irrigation. The CT had higher sugar beet root yield and recoverable sucrose than either ST or SN treatments under flood irrigation. Sugar beets grown under different tillage, and irrigation systems, responded similarly to N fertilizer in both years. Combined results over the 2 yr indicated no significant N × tillage or N × irrigation interactions which implied that fertilizer‐N recommendations do not need to be adjusted for tillage or irrigation system. Moreover, no difference between SN and ST treatments were observed ( p = 0.5377) for recoverable sucrose which suggested that banding nutrients with a strip tillage implement did not improve efficiency.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Article
    DOI: 10.2134/agronj14.0081
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 1471598-3
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  • 6
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    Online Resource
    Drivers of diazotroph community structure and co-occurrence in a Northern Great Plains pulse crop rotation system
    Elsevier BV ; 2021
    In:  Applied Soil Ecology Vol. 157 ( 2021-01), p. 103737-
    Details
    In: Applied Soil Ecology, Elsevier BV, Vol. 157 ( 2021-01), p. 103737-
    Type of Medium: Online Resource
    ISSN: 0929-1393
    URL: Article
    DOI: 10.1016/j.apsoil.2020.103737
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 2013020-X
    detail.hit.zdb_id: 1196758-4
    SSG: 12
    SSG: 13
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  • 7
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    Crop rotation influences yield more than soil quality at a semiarid location
    Wiley ; 2022
    In:  Agronomy Journal Vol. 114, No. 4 ( 2022-07), p. 2280-2289
    Details
    In: Agronomy Journal, Wiley, Vol. 114, No. 4 ( 2022-07), p. 2280-2289
    Abstract: Rotations with fallow or cover crops before winter wheat (WW) had similar yield to WW–fallow. Soil water extracted during grain fill by camelina, lentil, & pea was only from the top 55 cm. A fallow provides a greater grain yield benefit to winter wheat than to pea. Particulate organic matter was greater in rotations with cropping intensity of 1.00 vs. 0.67.
    Type of Medium: Online Resource
    ISSN: 0002-1962 , 1435-0645
    URL: Issue
    URL: Article
    DOI: 10.1002/agj2.v114.4
    DOI: 10.1002/agj2.21097
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 1471598-3
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  • 8
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    Online Resource
    Dry pea ( Pisum sativum L.) protein, starch, and ash concentrations as affected by cultivar and environment
    Canadian Science Publishing ; 2018
    In:  Canadian Journal of Plant Science Vol. 98, No. 5 ( 2018-10-01), p. 1188-1198
    Details
    In: Canadian Journal of Plant Science, Canadian Science Publishing, Vol. 98, No. 5 ( 2018-10-01), p. 1188-1198
    Abstract: Dry pea (Pisum sativum L.) is an important crop in the Northern Great Plains of the USA and Canada. Information on dry pea quality as affected by cultivars and environments is limited. This experiment determined the effects of dry pea cultivars and environments on protein, starch, and ash concentrations. Six dry pea cultivars (‘Arcadia’, ‘Bridger’, ‘CDC Striker’, ‘Cruiser’, ‘Montech 4152’, and ‘SW Midas’) were evaluated in a randomized complete block design with four replications in 22 environments. The results showed that cultivar × environment interaction effects were highly significant on protein, starch, and ash concentration (p  〈  0.0001). These interaction means, calculated on a dry matter basis, ranged from 145 to 278 g kg −1 seed for protein, 439 to 617 g kg −1 seed for starch, and 10.5 to 31.9 g kg −1 seed for ash. The differences among environmental means were substantial compared with cultivar means. When averaged over environments, ‘CDC Striker’, ‘Arcadia’, and ‘Montech 4152’ produced greater mean protein, starch, and ash concentrations, respectively, than the other cultivars. None of these cultivars simultaneously outperformed the others for protein, starch, and ash concentrations. This may indicate the need to develop cultivars with outstanding qualities across environments to receive satisfy premium end-user quality requirements.
    Type of Medium: Online Resource
    ISSN: 0008-4220 , 1918-1833
    URL: Article
    DOI: 10.1139/cjps-2017-0338
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2018
    detail.hit.zdb_id: 2016989-9
    SSG: 12
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  • 9
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    Online Resource
    Camelina sativa as a fallow replacement crop in wheat-based crop production systems in the US Great Plains
    Elsevier BV ; 2018
    In:  Industrial Crops and Products Vol. 111 ( 2018-01), p. 22-29
    Details
    In: Industrial Crops and Products, Elsevier BV, Vol. 111 ( 2018-01), p. 22-29
    Type of Medium: Online Resource
    ISSN: 0926-6690
    URL: Article
    DOI: 10.1016/j.indcrop.2017.10.001
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2018
    detail.hit.zdb_id: 1483245-8
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