The Response Of Soybeans To Sources Of Nitrogen In The Field1

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AGR-213: Soybean Nutrient Management in Kentucky

bean field is properly inoculated, N fixa-tion will supply adequate N. The only two nutrients that need to be added to soil on a regular basis are P and K. To date, no University of Kentucky research has documented soybean yield increases to fertilizer Ca, Mg or S applications. Com - mon fertilizer sources used in Kentucky

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Nitrogen on Soybeans, Does it Work? The combination of high protein and high oil content in soybeans makes the assimilation of nitrogen critical to achieve maximum yields. When designing a fertility program for soybeans keep in mind that they use less than 50% of their Nitrogen from N2 nitrogen sources. N2 nitrogen is the form of Nitrogen that

Nitrogen uptake, fixation and response to fertilizer N in

2 fixation, and the yield response to N fertilization. Particular emphasis was placed on ensuring that data from high-yielding environments, which we define as soybean seed yields greater than 4.5 5 Mg ha−1, were included in this analysis. 2. Data sources and analysis 2.1. Data sources A database derived from 108 studies that included a

Sulfur for Field Crops - Cornell University

and soybeans than for grass hay and corn. Higher yielding fields have a higher rate of sulfur removal when compared with lower producing fields. Sulfur removal rates for most common field crops grown on dairy farms in New York are listed in Table 1. Using the average values in Table 1, a 20 ton/acre corn silage crop (35% DM) would remove almost 14


the MRTN nitrogen rate. The MRTN nitrogen rate is higher for corn after corn than for corn after soybeans, due to N benefit from the soybeans. The MRTN rate will also vary with the productivity or yield potential of the soil. The recommended amount of N varies with the N:corn price ratio. At an N: corn price ratio of 0.10 the MRTN for corn after

Soybean yield, nutrient uptake and role of biological

Strong demand of N in soybeans (0.2 bu/lbs N), partially satisfied with the N fixation (ranging from 30- 80%, ~50-60%). N response on soybeans is erratic and a diagnostic tool (e.g., ureide) should be tested and calibrated to start exploring N applications to obtain more consistent yield responses.

Nutrient Management Suggestions for Corn

Nitrogen Requirement Our recommendations for fertilizer N are based on ex-pected yield, the amount of residual soil nitrate-N (NO 3-N), soil organic matter, other N sources, timing of application, and price of fertilizer. This remains an option and is useful in planning and financial budgeting. Alternative N manage-

Pelletized Lime for Short-Term Treatment of Soil Acidity

yield response of pelletized lime to agricultural lime. Accomplishments in Year 2 Soybeans Elemental sulfur (2000 lb/acre) was applied to acidify a non-irrigated Reelfoot sandy loam soil at the Delta Research Center at Portageville in February 2005. Soil samples collected in early May of 2005 showed 1209 ENM/acre was needed. Ag lime

Influence ofNitrogen Rate, Timing ofNitrogen Application and

Nitrogen Fertilization andNitrogen Utilization by Twelve Small Grain Varieties -Crookston, MN- 1982 57 Comparison ofNitrogen Sources onSpring Wheat andBarley 61 Effects ofNitrogen RateandPlacement onTwoMalting Barley Varieties 63 Effects of Nitrogen on Sunflower 65 Nitrogen, Phosphorus andPotassium Fertilizer Studies onOilseed Sunflower 66

Manitoba Soil Fertility Guide - Province of Manitoba

1 Nitrogen INTRODUCTION Providing an adequate supply of essential plant nutrients has a major impact on crop yields and is one crop production factor that can be

Interpretation of Soil Test Results

Nitrogen, in the form of nitrate, is a concern from a drinking water standpoint. The biologi-cal productivity of surface waters (fresh water) is not limited from lack of N because enough arrives or is generated from natural background sources such as rainfall, organic matter, and biological N fixation by microbes in water.

Chapter Beneficial Plant Microbe Interactions and Their

soybeans Under both greenhouse and field conditions, increases in nutrient content, yield, and overall fitness of soybeans in response to an AM colonization can be observed [36, 37], and soybean yields are significantly correlated to the coloniza-tion of the roots with AM fungi [38]. Many reports clearly demonstrate the positive

Developing Phosphorus and Potassium Recommendations for Field

els to crop yield response I. n Ohio t, his response curve data was used to develop Extension Bulletin E-2567: Tri-State Fertilizer Recommendations for Corn, Soybeans, Wheat, and Alfalfa, which was a coordinated effort of Michigan State University, The Ohio State University, and Purdue University. This fact sheet describes how to use a soil test


4 and 5). Among the various N sources, AN resulted in the greatest yield increases (range of 4.0 to 5.7 bushels acre-1) followed by UAN (range of 3.1 to 4.1 bushels acre-1), where both sources significantly increased yield at all application times. All the N sources increased yield when applied at the R1 or R3 growth stages.

In-Season Fertilizer Nitrogen Applications for Soybean in

Criteria for field selection included: (i) plot areas within stage during the first week of September (before leaf drop Table 1. Soil series, textural class, taxonomy, soil properties (0 15 cm), and growing-season precipitation for each site year.

Manure application rate guide

nitrogen (N) test value (lbs/1000gal or lbs/ton). 3. In the top row of the chart locate the desired amount of nitrogen you want to be available to the crop grown. 4. Where these two values intersect on the chart is the desired application rate in either 1,000 s of gallons or tons per acre. NOTE: Due to rounding, applied nitrogen

Amino Acids and Biosynthesis Byproducts As Nitrogen Sources

A field experiment was conducted in 2013 near Ames, IA on a Clarion Series soil (fine-loamy, mixed, superactive, mesic Typic Hapludolls). The study site was cropped with soybeans the previous year. The experimental design was a randomized complete block with four replicates. Corn was planted at 79,000 seeds ha-1 with a full-season hybrid

Nutrient Management for High Yield Soybeans

The yield (and protein) response to N was higher with the modern varieties They yield response to N occur despite high soil fertility (OM levels of 2.9 to 4.1%) N Supply from Soil And Biological N Fixation was Insufficient to Maximize Yield Crop Science, 54:340-348 (2014) Grain yield of cultivars released from 1923 to 2008 (MG3)

1. Extent of freeze damage to wheat 1 2. Failed wheat: Effect

manure have also shown some positive yield response in soybeans, probably due to the release of N from the decomposing manure late in the summer. On the other hand, N fertilizer has generally not hurt soybean yields. Negative responses to nitrogen application to soybeans, either as fertilizer or manure, have not been common.


to the soil or utilized as feed. Nitrogen is supplied to soybeans mainly by nitrogen fixation, and fertilizer nitrogen application is not recommended if the plants are well nodulated. Soybeans are high in protein which contains lots of nitrogen. The beans remove 130 pounds of nitrogen per acre, and 44 pounds with the stover. Soybeans use all the

Chapter 57: Soybean Cyst Nematode - SDSU Extension

different SCN populations to overcome different sources of resistance in soybean. In the past, a scheme classifying the SCN population into different races based on the population s response towards four known sources of resistance was used (PI 88788, PI 90763, Pickett and Peking).

Manure Nitrogen Rates for Corn Production

Accounting for all sources of nitrogen In determining the proper rate, farmers must account for all sources of N including, but not limited to: Any commercial fertilizer or manure applications for the current crop Including the use of starter fertilizer Previous crops can provide a source of N for the current corn crop.

Chapter II Agronomic Crops -

nitrogen plus potash to prevent seedling injury and loss of stand. 2. Split applications of nitrogen may be beneficial when nitrogen rates are greater than 120 pounds per acre. See corn nitrogen rate calculator at 3. If nitrogen sources containing urea are not incorporated, some loss of nitrogen may occur if applied to

Comparing Nitrogen Rates and Sources and Crop Rotation

Comparing Nitrogen Rates and Sources and Crop Rotation Effects on Corn Yield on Lakebed Soils. Greg LaBarge, Agriculture and Natural Resources Extension Agent Objective. To observe yield response and post-mortem stalk nitrate nitrogen concentration of corn when urea-ammonium nitrate (UAN) or anhydrous ammonia is supplied at different rates on

Soybean Soil Fertility SF1164

Nitrogen Nodulation Although the atmosphere is 78% cell wall. The bacteria releases a chemi nitrogen (N) gas, plants cannot use it directly. Plants can use only ammonium-N or nitrate-N. Soybeans are a legume and normally should provide adequate N through a symbiotic relationship form nodules (2, 3, 4) with N-fixing bacteria of the species

Foliar Boron Bumps Soybean Yields

additional response to foliar B may occur if leaf tissue is below 40 ppm B. Soil analysis interpretation varies with soil type. In coarse-textured soils, B at 0.4 lb/A may be sufficient, while greater than 1 lb/A may be needed in finer-textured soils. For intensively managed high-yield soybeans, especially under irrigated

Manganese - Cornell University

Field crops with a high Mn requirement include soybeans, wheat, barley, and oats. Corn has a medium Mn requirement. Manganese is highly immobile in the plant so Mn deficiency symptoms are first seen in the young leaves. A Mn deficiency is recognized by interveinal chlorosis (yellowing between the veins of the

Field Research -

muchneeded field work, especiallyinthe South.However, field workcame to a haltduring the lastweek ofApril when the stateexperienced heavy rains, severeweather, and a spring snow storm. Maywas mild and relatively dryand broughtmore summer-like weather than nearlythe entiresummer of 1993.

Fertilizer Use and Crop Yields

response curves) were forprepared on a statewide basis for each principal crop theas shown by the example in figure 1. The Form A curves thus were a close expression regionalof the data from field experiments. The Form A curves from each State usually were reviewed by all of the State representatives within a region.

Nitrogen Fertilizer for Soybean?

Sources of Nitrogen for a Soybean Crop Unfertilized soybean receives its N from only two sources: N fixation and soil N (Figure 1). A recent review of scientific papers compared the N demand of high-yielding soybean to the capacity of soybean to fix N from the air and obtain it from the soil (Salvagiotti et al., 2008). Because N concentration in

Sugarcane Response to Mill Mud, Fertilizer, and Soybean

(Vigna radiata), peanuts, and soybeans and reported N con-tributions ranging from 50 kg ha 1 for cowpea to 310 kg ha 1 for soybean. Sugarcane yield response was commensurate to N contributed by the fallow crop, with no N fertilizer required in sugarcane following soybeans. Bell et al. (1998) reported plant

EC143 Fertilizing Winter Wheat

The optimum fertilizer nitrogen rate for winter wheat (with a maximum rate of 100 lb of nitrogen per acre for dryland, and 150 lb of nitrogen per acre irrigated) can be calculated with the following equation or by using Table I. Nitrogen Rate (lbs/acre) = ((N Price / Wheat Price) + (NO. 3-N/68.7) - 0.235)*-725 Where:


This response is illustrated by results of research conducted in Nebraska (Table 1). In this study, four sources of Zn (EDTA, Nulex, zinc oxide, zinc sulfate) were applied in a band as part of a suspension fertilizer (8-20-0) 2 inches to the side of and 2 inches below the seed at planting.

Effect of Tillage and Nitrogen Rate on Corn Yield and

effect on corn grain yield with both N sources. Tillage 3 N rate had a significant effect on plant N and P uptake, especially at early growth stages with both N sources. Recovery percentage of applied N across all tillage systems and N rates was 40% and 27% for manure and fertilizer sources, respectively, at the 12th-leaf growth stage of corn

1. Nitrogen fertilization of forage sorghum 1 2. Applying

Other considerations when applying nitrogen to soybeans While N applied to N-deficient soybeans at the pod development or early pod fill stages of growth can increase yields (as long as the apparent N deficiency is not simply a response to soil compaction), there are risks: * Leaf burn. It would be much safer to apply urea than UAN solution.

Comparison of Incorporated Swine Finishing Manure

Nitrogen Sources at Side-dress for Corn Yield Glen Arnold, Ohio State University Extension Field Specialist Objectives To compare corn yield response to nitrogen applied at side-dress as incorporated swine finishing manure, 28% UAN, and anhydrous ammonia. Background Crop Year: 2012 Cooperator: Mike Schumm County/Town: Van Wert, Wilshire

Milo Production Tips - University of Nebraska Lincoln

bean crops. Take full credit for nitrogen from these sources. Soil test levels will tell you the nitrogen fertilizer addition you will need and the response you might expect from phosphorus and zinc. If the phosphorus level in the field is low starter fertilizer is an excellent way to get the phosphorus efficiently placed for top response.

Soil and Applied Manganese (A2526) - Corn Agronomy

fields. Rarely is an entire field affected. Toxicity Symptoms Excess manganese distorts leaves and produces dark specks on leaves. In severe cases, leaf tissue begins to die at the leaf margins and continues back from the margins as toxic conditions increase. Soil Analysis Manganese treatment is recom-mended if the soil tests less than 10 ppm.


Credit Nitrogen from On-Farm Sources Nitrogen credits from manure or legume crops should be accounted for and subtracted from the base N recommendation (Kelling et al., 1998). Alfalfa N credits published by UWEX soil scientists range from 40 to 190 lbs N per-acre available for a following crop, depending on soil