Nitrogen Management for Corn Grown on a Clay Soil PDF Download
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Author: Preston W. Parker
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 72
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Book Description
Author: Preston W. Parker
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 72
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Book Description
Author: Tyler W. Steusloff
Publisher:
ISBN:
Category :
Languages : en
Pages : 155
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Book Description
Adoption of nitrogen (N) management strategies to minimize gaseous N loss from agriculture while maintaining high yield production is increasingly important for an exponentially growing population. Agricultural management on poorly-drained claypan soils in the Midwestern U.S. make corn (Zea mays L.) production even more challenging due to the subsoil's low permeability, which may result in wetter soil conditions and relatively larger amounts of soil N[subscript 2]O emissions during the growing season. The objective of this study was to determine the effects of urea fertilizer placement with and without the addition of a nitrification inhibitor (NI) on corn yield, N use efficiency (NUE), and cumulative soil N[subscript 2]O emissions on a Northeastern Missouri claypan soil. The fertilizer strategies utilized in this study consisted of deep-banded urea (DB) or urea plus nitrapyrin [2-chloro-6-(trichloromethyl) pyridine] (DB+NI) at a depth of 20 cm compared to urea broadcast surface applied (SA) or incorporated to a depth of 8 cm (IA). The addition of a NI with deep-banded urea resulted in 27% greater apparent N recovery efficiency than all other N treatments. Additionally, DB+NI had 54 and 55% lower cumulative soil N[subscript 2]O emissions than IA and SA treatments in the two combined growing seasons. These results suggest that deep placement of urea with or without nitrapyrin is an effective management strategy for increasing corn yield and reducing N loss on a claypan soil.
Author: Steven Lyle Oberle
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
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Author:
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Category : Marine eutrophication
Languages : en
Pages : 152
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Author: Kent A. Reed
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
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Author: Amitava Chatterjee
Publisher: John Wiley & Sons
ISBN: 0891183531
Category : Technology & Engineering
Languages : en
Pages : 160
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Book Description
In Soil Fertility Management in Agroecosystems, Editors Amitava Chatterjee and David Clay provide a thoughtful survey of important concepts in soil fertility management. For the requirements of our future workforce, it is imperative that we evolve our understanding of soil fertility. Agronomists and soil scientists are increasingly challenged by extreme climatic conditions. Farmers are experimenting with integrating cover crops into rotations and reducing the use of chemical fertilizers. In other words, there is no such a thing as a simple fertilizer recommendation in today's agriculture. Topics covered include crop-specific nutrient management, program assessment, crop models for decision making, optimization of fertilizer use, cover crops, reducing nitrous oxide emissions, natural abundance techniques, tile-drained conditions, and soil biological fertility.
Author: George William Rehm
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 8
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Author: William Cadid Smith
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 124
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Author: J. H. Muir
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 15
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Book Description
The silt loam soils apparently differ in N recommendations for corn production depending on whether the parent material is loessial or alluvial. The loessial silt loam soils appear to have a lower N requirement perhaps due to a lower N loss or more N mineralized from organic matter than the alluvial soils. The alluvial silt loam soils have a higher N requirement than the loessial soils. Nitrogen rates required to produce agronomic optimum yields on silty clay soils are much higher than on coarse testured soils, ranging from 250 to 300 lb/ acre when yield goals are 150 and 175 bu/acre, respectively. Although more N is required on silty clay soils, the additional cost may be neutralized by less need for fertilizer P and K. Thus, corn may be a profitable alternative crop for clayey, poorly drained soils in the Mississippi River delta of Arkansas. The fertilizer N requirement for corn production on the different soils had the following rank: silty clay soils>alluvial silt loam soils>loessial silt loam soils. The actual range of N recommendations (based on Tables 3 and 6) can be defined as 250 to 300 lb/acre for silty clay soils, 175 to 225 lb/acre for alluvial silt loam soils and 125 to 175 lb/acre for loessial silt loam soils. This study indicated that the lb N/bu grain for silty clay, alluvial silt loam and loessial silt loam soils were approximately 2.0, 1.0 and 1.0, respectively. Thus the current recommendations for N rates on corn for silt loam soils are supported by this study; whereas, N rates for corn grown ...
Author: Brendan A. Zurweller
Publisher:
ISBN:
Category :
Languages : en
Pages : 118
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Book Description
Intense precipitation events during the corn growing season on poorly-drained soils in the Midwestern United States can result in yield loss due to abiotic plant stress and nitrogen fertilizer loss associated with flooding. Nitrogen loss from soils also has environmental implications if nitrate reaches surfaces waters or gaseous nitrous oxide emissions occur. The objectives of this study were to determine the effects of soil flooding on enhanced efficiency pre-plant and post-flooding nitrogen fertilizer applications on corn production and soil nitrogen availability/loss. Results of this research show that a 50% reduction in soil nitrate can occur after one day of flooding, and large pulses of nitrous oxide emissions can occur in a short time period when soils are flooded. In the 2012 growing season, slight advantages were observed with the use of enhanced efficiency nitrogen fertilizers and a post-flood nitrogen fertilizer application. A significant loss of corn grain yield was observed after three days of flooding in 2013. These results indicate that saturated soil conditions can have both economic and environmental impacts and there is a need for future research to address both drainage and nitrogen management strategies for possible applications to farmers.
