Long Term Corn And Soybean Response To Phosphorus Fertilization In Iowa

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Long-term Corn and Soybean Response to Phosphorus Fertilization in Iowa

Author : Jason Robert Dodd
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (531 download)

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Book Synopsis Long-term Corn and Soybean Response to Phosphorus Fertilization in Iowa by : Jason Robert Dodd

Download or read book Long-term Corn and Soybean Response to Phosphorus Fertilization in Iowa written by Jason Robert Dodd and published by . This book was released on 2003 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efficient P fertilization practices are of great concern to Corn Belt farmers because of the agronomic and environmental implications of increasing soil-test P (STP) trends. This study evaluated (1) long-term STP trends for various initial STP levels and annual P application rates, (2) yields of corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] as affected by P fertilization and STP. Yield and STP data were collected from three experiments established in Iowa during the 1970s on Webster (fine-loamy, mixed, mesic Typic Endoaquolls)-Nicollet (fine-loamy, mixed, mesic Aquic Hapludolls) soils, Webster-Canisteo (fine-loamy, mixed, calcareous, mesic Typic Endoaqualls) soils, and Kenyon (fine-loamy, mixed, mesic Typic Hapludolls) soils. Crops were grown in rotation each year until 2002. Three initial contrasting STP levels ranging from 17 to 75 mg kg−1 (Bray-P1) were created at two sites, and annual treatments of 0, 11, 22, and 33 kg P ha−1 were superimposed. At a third site, annual rates of 0, 22, and 45 kg P ha−1 were applied annually. Annual P rates required to maintain 16-20 mg kg−1 STP were similar at Webster-Nicollet-Canisteo soils (13-17 kg P ha−1), however,>30 kg P ha−1 was required to maintain STP levels four times higher. At the Kenyon soil, a similar Phosphorus rate maintained a higher STP level (28 mg kg−1). Critical STP concentrations identified with linear-plateau and quadratic-plateau models across sites were 18-23 mg kg−1 for corn and 11-18 mg kg−1 for soybean. Results indicate that 10-15 years of cropping without P fertilization were required on high testing soils before yield response to P was observed. Abbreviations: AGRON, Agronomy and Agricultural Engineering Research Farm; NERF, Northeast Iowa Research Farm; NIRF, Northern Iowa Research Farm; STP, soil-test P.

Long Term Effects of Phosphorus and Conservation Tillage Management on Crop Yield and Soil Phosphorus in Corn-soybean Rotations

Author : Jacob Prater
Publisher :
ISBN 13 :
Total Pages : 97 pages
Book Rating : 4.:/5 (754 download)

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Book Synopsis Long Term Effects of Phosphorus and Conservation Tillage Management on Crop Yield and Soil Phosphorus in Corn-soybean Rotations by : Jacob Prater

Download or read book Long Term Effects of Phosphorus and Conservation Tillage Management on Crop Yield and Soil Phosphorus in Corn-soybean Rotations written by Jacob Prater and published by . This book was released on 2007 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract not available.

Phosphorus and Potassium Management for Corn and Soybeans in Conservation Tillage

Author : Rogério Borges
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (412 download)

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Book Synopsis Phosphorus and Potassium Management for Corn and Soybeans in Conservation Tillage by : Rogério Borges

Download or read book Phosphorus and Potassium Management for Corn and Soybeans in Conservation Tillage written by Rogério Borges and published by . This book was released on 1998 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the grain yield, P or K uptake, and early dry weight responses of no-tilled and ridge tilled soybeans [Glicine max (L.) Merr.] and ridge tilled corn (Zea mays L.) to broadcast, deep-band, and planter-band P and K fertilizer placements under Iowa soil and weather conditions. Long-term P and K trials were established in 1994 at five research centers and were evaluated for four years. Forty short-term P-K trials were established in farmers' fields from 1995 to 1997. Treatments were various P (O to 56 kg P ha−1) and K (O to 132 kg K ha−1) rates broadcast, banded with the planter 5 cm beside and below the seeds, and deep-banded at a 15-20 cm depth before planting. Plant samples were taken at V5 to V6 growth stages, dried, weighed, ground, and analyzed for total P and K content. Soil samples were taken from different depth and position relative to crop rows or fertilizer bands.

Evaluation of Corn and Soybean Response to Phosphorus and Potassium Fertilization

Author : Ingrid Arns
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)

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Book Synopsis Evaluation of Corn and Soybean Response to Phosphorus and Potassium Fertilization by : Ingrid Arns

Download or read book Evaluation of Corn and Soybean Response to Phosphorus and Potassium Fertilization written by Ingrid Arns and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Corn (Zea mays) response to fertilization and placement methods has been studied extensively; however studies on soybean [Glycine max (L.) Merr.] response to placement have been limited. Three studies were completed to evaluate different aspects of crop response. The objective of the first study was to evaluate the effect of starter and broadcast fertilizer application on corn and soybean, in a typical corn-soybean rotation in Kansas. Treatments were unfertilized control, starter (N, P and K), broadcast P and K using mono ammonium phosphate (MAP) and potassium chloride (KCl) and the combination of starter and broadcast. Corn and soybean yield generally was not affected by starter and broadcast treatments. Thus fertilization may be recommended only under specific conditions. The objectives of the second study were (i) to evaluate the effect of residual and direct fertilization on soybeans after corn under a corn-soybean rotation system, and (ii) study the effect of fertilizer P and K application on soil test P (STP) and soil test K (STK) changes over time. Direct fertilization increased soybean yield while residual fertilizer did not. Therefore maintenance rates may be effective to improve soybean yield and likely maintain STP and STK levels. Application of P and K fertilizer generated significant increases in STP and STK after one year of application. The rate of P and K fertilizer required to increase 1 mg kg−1 yr−1 was between 2.8 - 5.1 kg ha−1 for P and between 1.0- 2.5 kg ha−1 for K, respectively. The objective of the third study evaluate both corn and soybean response to direct P fertilization including starter and broadcast. The treatments were a control, two starter fertilizers (with N-P and N only), five P rates (9.8, 19.6, 29.3, 39.1, 48.9 kg P ha−1) and one treatment with starter fertilizer in addition to the broadcast fertilizer application. Corn grain yield was not significantly affected by any broadcast or starter treatments. Broadcast application rates significantly increased soybean yield on low STP levels. Results of this study show that large corn or soybean yield response to starter and broadcast P application are likely with low STP levels.

A Comparison of Soybean and Corn Response in Yield and Leaf Composition to Added Phosphorus and Potassium Fertilizer Materials

Author : Jerry Leon Young
Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.:/5 (345 download)

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Book Synopsis A Comparison of Soybean and Corn Response in Yield and Leaf Composition to Added Phosphorus and Potassium Fertilizer Materials by : Jerry Leon Young

Download or read book A Comparison of Soybean and Corn Response in Yield and Leaf Composition to Added Phosphorus and Potassium Fertilizer Materials written by Jerry Leon Young and published by . This book was released on 1972 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fertilizer Application on Crop Yield

Author : Jagadish Timsina
Publisher : MDPI
ISBN 13 : 3038976547
Total Pages : 252 pages
Book Rating : 4.0/5 (389 download)

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Book Synopsis Fertilizer Application on Crop Yield by : Jagadish Timsina

Download or read book Fertilizer Application on Crop Yield written by Jagadish Timsina and published by MDPI. This book was released on 2019-04-02 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fertilizer application can increase crop yields and improve global food security, and thus has the potential to eliminate hunger and poverty. However, excessive amounts of fertilizer application can contribute to groundwater pollution, greenhouse gas emissions, eutrophication, deposition and disruptions to natural ecosystems, and soil acidification over time. Small farmers in many countries think inorganic fertilizers are expensive and degrade soils, and thus policymakers want to promote organic instead of inorganic fertilizers. To develop practical fertilizer recommendations for farmers, yield responses to applied fertilizers from inorganic and organic sources, indigenous nutrient supply from soil, and nutrient use efficiency require consideration. There is a lack of sufficient scientific understanding regarding the need and benefit of integrated nutrient management (i.e., judicious use of inorganic and organic sources of nutrients) to meet the nutrient demand of high-yielding crops, increase yields and profits, and reduce soil and environmental degradation. Inadequate knowledge has constrained efforts to develop precision nutrient management recommendations that aim to rationalize input costs, increase yields and profits, and reduce environmental externalities. This Special Issue of the journal provided some evidence of the usefulness of integrated nutrient management to sustain soil resources and supply nutrients to crops grown with major cereal and legume crops in some developing countries.

Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa

Download Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa PDF Online Free

Author : Eduardo Felipe Casanova
Publisher :
ISBN 13 :
Total Pages : 452 pages
Book Rating : 4.:/5 (511 download)

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Book Synopsis Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa by : Eduardo Felipe Casanova

Download or read book Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa written by Eduardo Felipe Casanova and published by . This book was released on 1979 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Uniform and Variable-rate Fertilizer and Manure Phosphorus for the Corn-soybean Rotation

Author : David John Wittry
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (53 download)

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Book Synopsis Uniform and Variable-rate Fertilizer and Manure Phosphorus for the Corn-soybean Rotation by : David John Wittry

Download or read book Uniform and Variable-rate Fertilizer and Manure Phosphorus for the Corn-soybean Rotation written by David John Wittry and published by . This book was released on 2002 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision agriculture has evolved from a concept into an accepted management practice. The challenge now is how to best utilize these technologies for the benefit of agriculture. Nutrient management could be improved and spatial variability reduced by variable-rate (VR) application. The objectives of this dissertation were to assess the value of VR P fertilization and P-based liquid swine manure application for corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] production compared with the traditional uniform-rate (UR) application. On-farm research methods based on replicated, long narrow strips were adapted to precision technologies. These technologies included grain yield monitors, differential global positioning systems, and geographical information systems. Treatments consisted of a non-fertilized control, a UR method based on average soil-test P (STP) for the entire field and a VR method based on STP from 0.2 to 1.7 ha grid cells. Grain yield and temporal changes in STP were used to assess treatment differences in both studies. In addition, plant dry weight, P concentration, and P uptake (V5 growth stage) were used in the fertilizer study. Phosphorus fertilization and manure often increased whole-field crop grain yield in fields which average STP values were below the Optimum interpretation class for corn and soybean production. Analyses of yield for field areas with contrasting STP values often showed significant responses to fertilizer or manure P in field areas testing Optimum or less, but rarely in high-testing areas. Phosphorus fertilization increased early plant growth and P uptake more frequently than grain yield. Although the method of P application did not influence whole-field or within-field plant responses, VR reduced soil P variability compared with UR by increasing STP in low-testing areas and decreasing or not affecting STP of high-testing areas. This research showed precision farming technologies are useful tools for improving nutrient management. Fertilization or manure application programs that vary the nutrient application rate may not result in increased yield compared with UR application methods. However, use of VR technology will result in better nutrient management and perhaps better water quality because of more efficient distribution of fertilizer or manure.

Soil Fertility and Nutrient Management

Author : Roma Doshi
Publisher :
ISBN 13 : 9781681170954
Total Pages : 0 pages
Book Rating : 4.1/5 (79 download)

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Book Synopsis Soil Fertility and Nutrient Management by : Roma Doshi

Download or read book Soil Fertility and Nutrient Management written by Roma Doshi and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil fertility refers to the ability of a soil to supply plant nutrients. Bioavailable phosphorus is the element in soil that is most often lacking. Nitrogen and potassium are also needed in substantial amounts. For this reason these three elements are always identified on a commercial fertilizer analysis. For example a 10-10-15 fertilizer has 10 percent nitrogen. Inorganic fertilizers are generally less expensive and have higher concentrations of nutrients than organic fertilizers. Also, since nitrogen, phosphorus and potassium generally must be in the inorganic forms to be taken up by plants, inorganic fertilizers are generally immediately bioavailable to plants without modification. However, some have criticized the use of inorganic fertilizers, claiming that the water-soluble nitrogen doesn't provide for the long-term needs of the plant and creates water pollution.

Soil Fertility and Corn and Soybean Yield and Quality in a Six-year Nitrogen and Phosphorus Fertilization Experiment

Author : Peter M. Anthony
Publisher :
ISBN 13 :
Total Pages : 450 pages
Book Rating : 4.:/5 (826 download)

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Book Synopsis Soil Fertility and Corn and Soybean Yield and Quality in a Six-year Nitrogen and Phosphorus Fertilization Experiment by : Peter M. Anthony

Download or read book Soil Fertility and Corn and Soybean Yield and Quality in a Six-year Nitrogen and Phosphorus Fertilization Experiment written by Peter M. Anthony and published by . This book was released on 2012 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimum management of nitrogen (N) and phosphorus (P) fertilizers for corn [Zea mays L.] and soybean [Glycine max (L.) Merr.] production requires quantitative understanding of multiple soil processes and crop responses, including supply and immobilization of N and P by soil, the response of yield and quality to nutrient availability, and the relationships and interactions between N and P cycling, crop response, and other soil physical and chemical variables. We conducted a six-year experiment on two 16-ha fields on glacial-till soils in south-central Minnesota. In each year of a corn-soybean rotation, we measured soil physical and chemical parameters and grain yield and quality at a 0.014-ha resolution within each field. These observations coincided with placement of a randomized complete block, split plot design of N and P fertilizer treatments. Spatial patterns of mineralizable N were consistent over time. Mineralizable N was highly correlated to soil nitrate at a well-drained site, but not at a poorly-drained site. Increases in available soil P per kg of net P addition were significantly related to soil pH. Within fields, spatial patterns of soybean yields were highly correlated across years, and we observed consistent relationships between yield and soil variables. Overall, soybean yield related positively to soil P and Zn and negatively to pH at all site-years. Quadratic-plateau regression models of soybean yield in relation to soil P and Zn indicate that in high pH soils at these sites, yield is optimized when soil P and Zn levels are higher than current recommendations. Corn yields responded significantly to N rate and N rate by P rate interaction in all site-years. Whole-field economic optimum N rate differed significantly by site-year and by P treatment at some site-years. Site-specific P fertilization should account for spatial variation in soil P buffering capacity. Nitrogen mineralization and NxP nutrient interactions should be accounted for in agronomic management decisions for corn production. The consistent influence of soil pH on nutrient cycling and crop response indicates the potential benefit to amelioration of high pH in calcareous glacial-till soils. Results highlight the significance of spatial variability in nutrient cycling to crop management.

Phosphorus and Potassium Placement for Corn and Soybean Managed with Two Conservation Tillage Systems

Author : Daniel Wayne Barker
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis Phosphorus and Potassium Placement for Corn and Soybean Managed with Two Conservation Tillage Systems by : Daniel Wayne Barker

Download or read book Phosphorus and Potassium Placement for Corn and Soybean Managed with Two Conservation Tillage Systems written by Daniel Wayne Barker and published by . This book was released on 1998 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deep-band K produced higher corn yields than other placements, even in high testing soils where no response was expected. There was no significant relationship between increases in early growth and greater grain yield for both crops. Stratification was largely reduced when deep-band P was applied but placement of K fertilizer did not reduce levels of stratification. In conclusion, early growth of both crops were greater in chisel till then for no-till. Chisel till usually produced greater corn grain yield than no-till while tillage seldom affected soybean yield. Grain yield of both crops benefited from P or K fertilizer applications. Planter-band P was effective for increasing early growth of corn and soybean. Deep-banded K increased corn grain yield when compared to other placements even in some high testing soils.

Research on Irrigation of Corn and Soybeans at Conesville and Ankeny, Iowa, 1951-1955

Author : Glenn Orville Schwab
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Research on Irrigation of Corn and Soybeans at Conesville and Ankeny, Iowa, 1951-1955 by : Glenn Orville Schwab

Download or read book Research on Irrigation of Corn and Soybeans at Conesville and Ankeny, Iowa, 1951-1955 written by Glenn Orville Schwab and published by . This book was released on 1958 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Efficiency of Fall and Spring Broadcast Fertilizer Phosphorus Application for Corn and Soybean in No-till

Author : Sebastián Raúl Barcos
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (213 download)

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Book Synopsis Efficiency of Fall and Spring Broadcast Fertilizer Phosphorus Application for Corn and Soybean in No-till by : Sebastián Raúl Barcos

Download or read book Efficiency of Fall and Spring Broadcast Fertilizer Phosphorus Application for Corn and Soybean in No-till written by Sebastián Raúl Barcos and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Soil Testing and Plant Analysis

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (925 download)

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Book Synopsis Soil Testing and Plant Analysis by :

Download or read book Soil Testing and Plant Analysis written by and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effects of Phosphorus and Potassium Fertilization Rate and Placement Method on Soybean (Glycine Max L.) Seed Quality and Long-term Storability

Download Effects of Phosphorus and Potassium Fertilization Rate and Placement Method on Soybean (Glycine Max L.) Seed Quality and Long-term Storability PDF Online Free

Author : Keaton Karl Krueger
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (76 download)

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Book Synopsis Effects of Phosphorus and Potassium Fertilization Rate and Placement Method on Soybean (Glycine Max L.) Seed Quality and Long-term Storability by : Keaton Karl Krueger

Download or read book Effects of Phosphorus and Potassium Fertilization Rate and Placement Method on Soybean (Glycine Max L.) Seed Quality and Long-term Storability written by Keaton Karl Krueger and published by . This book was released on 2011 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Relative Response of Corn and Soybeans to N, P, and K Fertilization as Measured by Plant Chemical Composition and Grain Yields

Author : Jerry Leon Young
Publisher :
ISBN 13 :
Total Pages : 512 pages
Book Rating : 4.:/5 (192 download)

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Book Synopsis The Relative Response of Corn and Soybeans to N, P, and K Fertilization as Measured by Plant Chemical Composition and Grain Yields by : Jerry Leon Young

Download or read book The Relative Response of Corn and Soybeans to N, P, and K Fertilization as Measured by Plant Chemical Composition and Grain Yields written by Jerry Leon Young and published by . This book was released on 1976 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

History of Soybeans and Soyfoods in Iowa (1854-2021)

Author : William Shurtleff; Akiko Aoyagi
Publisher : Soyinfo Center
ISBN 13 : 1948436469
Total Pages : 1800 pages
Book Rating : 4.9/5 (484 download)

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Book Synopsis History of Soybeans and Soyfoods in Iowa (1854-2021) by : William Shurtleff; Akiko Aoyagi

Download or read book History of Soybeans and Soyfoods in Iowa (1854-2021) written by William Shurtleff; Akiko Aoyagi and published by Soyinfo Center. This book was released on 2021-08-10 with total page 1800 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographic index. 325 photographs and illustrations - many color. Free of charge in digital PDF format.