Impact of Nitrification Inhibitor Use on Corn Yield and Soil Nitrogen Levels from Liquid Hog Manure Applied at Various Fall Timings PDF Download
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Author: Kathryn Jackson Publisher: ISBN: Category : Languages : en Pages :
Book Description
Manure applied in early with warmer temperatures can have higher nitrification rates and nitrogen loss potential, but waiting for cooler conditions in later fall risks an early winter conditions that may prevent application. Nitrate is susceptible to leaching and denitrification, which potentially could be minimized by including a nitrification inhibitor (NI) when applying manure. In this three-year study on corn, nitrapyrin was incorporated into liquid hog manure and applied at various fall timings and in spring. Soil samples were collected in the preceding fall, spring, and post-harvest, and plant nitrogen content, grain and stover were measured in the growing season. The seasonal manure application timing had a greater impact on plant responses than including the inhibitor, with spring manure applications having greater yields. It was found that there was an optimal window in November where fall-applied manure treatments had an economic benefit to being applied with a nitrification inhibitor.
Author: Kathryn Jackson Publisher: ISBN: Category : Languages : en Pages :
Book Description
Manure applied in early with warmer temperatures can have higher nitrification rates and nitrogen loss potential, but waiting for cooler conditions in later fall risks an early winter conditions that may prevent application. Nitrate is susceptible to leaching and denitrification, which potentially could be minimized by including a nitrification inhibitor (NI) when applying manure. In this three-year study on corn, nitrapyrin was incorporated into liquid hog manure and applied at various fall timings and in spring. Soil samples were collected in the preceding fall, spring, and post-harvest, and plant nitrogen content, grain and stover were measured in the growing season. The seasonal manure application timing had a greater impact on plant responses than including the inhibitor, with spring manure applications having greater yields. It was found that there was an optimal window in November where fall-applied manure treatments had an economic benefit to being applied with a nitrification inhibitor.
Author: Kyle Gustav Jensen Publisher: ISBN: Category : Languages : en Pages : 138
Book Description
Nitrogen fertilization is necessary to obtain respectable corn yields. Loss of nitrogen applied to the soil can significantly decrease yields. Suppressing the rate of nitrogen oxidation into a form that can be leached from the root zone may increase N use efficiency. The use of a nitrification inhibitor (nitrapyrin) has been shown to protect crop yield and groundwater quality when leaching conditions exist. Two year studies were conducted to determine the efficacy of reformulated nitrapyrin (Stay-N) when used with urea-ammonium nitrate solutions (liquid N fertilizer) and liquid swine manure upon corn yields. The liquid N studies were conducted in 2000 and 2001 at the Northwest Iowa Research Farm on a Galva soil (Typic Hapludoll) and in Central Iowa at the Burkey Farm on a Nicollet soil (Aquic Hapludoll). Treatments were arranged in split-plot, randomized, complete block design replicated four times. Main plots were Stay-N treatments, with (0.56 kg ai ha−1) or without Stay-N. Sub-plots were seven different rates of nitrogen: 0, 45, 90, 135, 180, 225, and 270 kg ha−1. Stay-N was mixed with the urea-ammonium nitrate solutions and sprayed on the appropriate plots using a small plot fertilizer applicator. The liquid swine manure study was conducted in 2001 and 2002 at the Armstrong Research Farm near Lewis, Iowa on a Colo soil (Cumulic Endoaquoll). The study was arranged in a randomized complete block design replicated four times. Liquid swine manure was applied to the plots to supply 0, 90, and 179 kg ha−1 of nitrogen. Stay-N rates were 0, 0.56, 1.12, and 2.24 kg ai ha−1. Stay-N was mixed with the swine manure before treatments were injected into the soil. Environmental conditions did not favor N losses during the time the studies were conducted.
Author: Jillian Filmer Publisher: ISBN: Category : Languages : en Pages :
Book Description
The goal of this study was determine if nitrification inhibition, using nitrapyrin (eNtrenchTM), and timing of manure application had an effect on nitrogen losses from corn fields. This study was conducted at the Elora Research Station, Elora, Ontario from October 2016 to October 2018. Liquid hog manure was applied at four fall timings and one spring timing with and without inhibitor. Soil samples and gas samples were collected periodically throughout the fall and growing season. Inhibitor addition had no significant effect on mineral nitrogen soil content or nitrous oxide emissions. Soil nitrogen and cumulative emissions were responsive to fall application timing. There was a significant interaction between the use of inhibitor and application timing on cumulative nitrous oxide emissions. This interaction showed higher cumulative losses of nitrous oxide from manure applied without inhibitor in late April. Based on these results, fall application would be best in mid-fall (mid-October to mid-November).
Author: Publisher: ISBN: Category : Agriculture Languages : en Pages : 1348
Book Description
Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).
Author: Timothy J. Foster Publisher: ISBN: Category : Languages : en Pages :
Book Description
World population, together with the cost of crop production inputs, is increasing rapidly. The current seven billion people on earth are expected to reach nine billion by 2050 with resulting demands on world food production. In addition, the quality of our environment is being impacted by human activities, including agricultural production and crop fertilization. Nitrogen (N) management is the process of applying N fertilizers in a way to maximize use of N by crops, while minimizing loss to the environment. It is becoming imperative, as a means of increasing crop yields and food supplies, while reducing input usage, and minimizing the impact of N fertilization on the quality of our environment, that improved N application practices be identified and utilized. The objectives for this study were to compare the timing of anhydrous ammonia (AA) fertilizer N applications, fall and spring, with and without two different nitrification inhibitors (NI) as possible tools to enhance yield and Nitrogen Use Efficiency (NUE) in corn (Zea mays) and winter wheat (Triticum aestivum L.) in Kansas. Two different nitrification inhibitors were tested as alternatives, N-Serve (nitrapyrin) produced and marketed by Dow AgroSciences, and an experimental product under development by Koch Agronomic Services LLC. Three differing rates of the experimental product were used to assist in determining the optimal rate for this product. The study was conducted over two growing seasons, 2012 and 2013, which differed significantly in rainfall, rainfall distribution, and resulting NUE. Experiments were established at three sites for both crops in both years, on sites/soils selected for differing potentials for N loss, and mechanisms of N loss. One site was established at the Kansas State University Agronomy North Farm (N Farm), where yield potential was high, and N loss potential was low. A second site was established under irrigation at the Kansas River Valley Experiment Field near Topeka, KS (KRV), on a coarse silt loam soil with high potential for N loss through leaching. The third site was established at the East Central Kansas Experiment Field near Ottawa KS (ECK), on a clay pan soil with a high potential for denitrification loss. Weather conditions together with soil characteristics played a major role in the performance of N timing applications and impacted the response to the use of the inhibitors. In low N loss environments such as the N Farm, fall applications of AA to increase spring time-availability for producers showed minimal negative effects on yield or NUE. When combined with a nitrification inhibitor in the fall, performance was similar to spring application for both corn and wheat. At the KRV site leaching loss or potential loss from fall application was high for corn and wheat in both years, however little impact on NUE with NI use was observed. At the high ECK denitrification site, there was only one N loss potential event leading to inhibitor performance at Ottawa in corn in 2013.
Author: Kathryn Jackson
Author: Kathryn Jackson
Author: Kyle Gustav Jensen
Author: Jillian Filmer
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Author: 
Author: American Society of Agricultural Engineers
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Author: 
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Author: Timothy J. Foster