Dairy Manure Nitrogen Availability in Eroded and Noneroded Soil for Sugarbeet Followed by Small Grains

Lentz, R.D.; Lehrsch, G.A.; Brown, B.; Johnson‐Maynard, Jodi; Leytem, April B.

doi:10.2134/agronj2010.0409

Cited by 20 publications

(62 citation statements)

References 42 publications

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“…We studied N mineralization at the 0-to 0.3-m depth because (1) most mineralization occurs there in the region's soils (Carter et al 1976;Lentz et al 2011), and (2) sugarbeet preferentially acquire inorganic N from there (Zinati et al 2001). We employed the buried bag method of Westermann and Crothers (1980), one subsequently adapted by Lentz and Lehrsch (2012a).…”

Section: Measuring Net N Mineralizedmentioning

confidence: 99%

“…Dairy manure typically increases bacterial populations and the substrate diversity for microbes (Larkin et al 2006). Judicious manure additions restore the productivity of eroded calcareous soils in both the western and central U.S. soon after application (Robbins et al 1997;Mikha et al 2014) and for years thereafter (Lentz et al 2011). Applications of manure, compost, or both provide P, K, and other nutrients to subsequent crops (Robbins et al 1997;Eghball 2002;Eghball et al 2004;Moore et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Of the field methods, the buried bag technique of Lentz and Lehrsch (2012a), as adapted from Eno (1960), gives representative estimates of in situ net N mineralized for the region's irrigated soils (Westermann and Crothers 1980;Meek et al 1994;Lentz et al 2011). The technique utilizes polyethylene film, permeable to O 2 and CO 2 but nearly impermeable to water vapor, to encase moist soil collected from, then replaced within a few hours into cavities in the soil profile.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, irrigated soils in the western U.S. experience unique environmental conditions, including those overwinter, that affect N cycling from post-harvest, fall-applied organic sources (Lentz et al 2011Lentz and Lehrsch 2012a). In-season mineralization of organic N is critically important, of course.…”

Section: Introductionmentioning

confidence: 99%

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Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Lehrsch

Brown

Lentz

et al. 2016

Nutr Cycl Agroecosyst

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Adequate characterization of nitrogen (N) mineralization with time from manure and other organic sources is needed to maximize manure N use efficiency, decrease producer costs, and protect groundwater quality. The objective of our 2-year field study at Parma, ID, was to quantify in situ N mineralization with time as affected by a one-time fall application of solid dairy manure, either composted or stockpiled. The experiment included five treatments: a non-N fertilized control, two first-year rates of stockpiled solid dairy manure (21.9 and 43.8 Mg ha -1 , dry wt.) and two rates (53.1 and 106.1 Mg ha -1 , dry wt.) of composted dairy manure (hereafter termed compost). Net N mineralized (mineralization less immobilization) was determined to a depth of 0.3 m by repeatedly measuring soil inorganic N (NH 4 -N ? NO 3 -N) concentrations in buried polyethylene bags. Overwinter mineralization was measured between amendment incorporation in fall and sugarbeet (Beta vulgaris L.) planting the following spring. In-season mineralization was measured in situ for seven consecutive incubation periods during the c. 220-day growing season for furrow-irrigated sugarbeet. Net N mineralized often varied among amendments and from year to year through mid-season, likely due to seasonal variation in soil temperature, annual differences in amendment properties, and other factors.

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Section: Measuring Net N Mineralizedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Lehrsch

Brown

Lentz

et al. 2016

Nutr Cycl Agroecosyst

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“…Soil at the site was classified as Portneuf (coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcid) and is extensive in southern Idaho, occupying approximately 117,000 hectares (USDA-NRCS, 2011). The site was developed and utilized for eroded soil experiments as described by Robbins et al (1997Robbins et al ( , 2000 and Lentz et al (2011) whereby the topsoil (0-30 cm) was removed. The top 30 cm of exposed subsoil was collected, air-dried, and passed through a 2-mm sieve.…”

Section: Soil Characterizationmentioning

confidence: 99%

Addition of activated switchgrass biochar to an aridic subsoil increases microbial nitrogen cycling gene abundances

Ducey

Ippolito

Cantrell

et al. 2013

Applied Soil Ecology

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a b s t r a c tIt has been demonstrated that soil amended with biochar, designed specifically for use as a soil conditioner, results in changes to the microbial populations that reside therein. These changes have been reflected in studies measuring variations in microbial activity, biomass, and community structure. Despite these studies, very few experiments have been performed examining microbial genes involved in nutrient cycling processes. Given the paucity of research in this area, we designed a 6 month study in a Portneuf subsoil treated with three levels (1%, 2%, and 10% w/w ratio) of a biochar pyrolyzed from switchgrass (Panicum virgatum) at 350 • C and steam activated at 800 • C to measure the abundances of five genes involved in N cycling. Gene abundances were measured using qPCR, with relative abundances of these genes calculated based on measurement of the 16S rRNA gene. At the end of the 6 month study, all measured genes showed significantly greater abundances in biochar amended treatments as compared to the control. In soil amended with 10% biochar, genes involved in nitrogen fixation (nifH), and denitrification (nirS), showed significantly increased relative abundances. Lastly, gene abundances and relative abundances correlated with soil characteristics, in particular NO 3 -N, % N and % C. These results confirm that activated switchgrass-derived biochar, designed for use as a soil conditioner, has an impact on the treated soils microbial communities. We therefore suggest that future use of biochar as a soil management practice should take into account not only changes to the soil's physiochemical properties, but its biological properties as well.Published by Elsevier B.V.

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Long‐term water retention increases in degraded soils amended with cross‐linked polyacrylamide

Lentz

2020

Agronomy Journal

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Cross‐linked polymer hydrogels, polyacrylamide co‐polymer (XPAM), and K‐polyacrylate (XPAA) increase soil water availability under drought, but their long‐term effects are unknown despite the importance of such knowledge in assessing economic feasibility. This 9‐yr outdoor pot study evaluated a one‐time addition of XPAM or XPAA at 0.25 or 0.5% dry weight (5.6 or 11.2 Mg ha−1) in a degraded calcareous silt loam. Controls included an unamended degraded soil and an unamended nondegraded soil (topsoil). Soil water retention and plant available water (PAW, g water g−1 dry soil−1) were measured in soil samples collected in spring for seven of the nine years. Across all years, the 0.5% XPAM produced the greatest PAW (0.318) and the PAW of other treatments followed in the order: 0.5% XPAM > 0.25% XPAM > Topsoil > 0.5% XPAA > 0.25% XPAA = control (0.224). In all years, the 0.25% XPAM and 0.5% XPAM treatments increased soil PAW relative to the control, that is, their PAW ratios exceeded unity. Topsoil PAW exceeded that of the control in six of the seven years measured. The PAW of 0.25% XPAM and 0.5% XPAM peaked in Year 1 after application and declined linearly with time (P < .03), at −0.0036 yr−1 and −0.0044 yr−1, respectively. Hence, the mean residence time the XPAM‐related water‐retention benefit is 24–29 yr. In this study, soil water‐retention benefits from XPAM amendments exceeded projections proposed by the industry (5 yr) and suggests that the cost‐benefits of field‐level XPAM applications might be more favorable than previously anticipated.

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Dairy Manure Nitrogen Availability in Eroded and Noneroded Soil for Sugarbeet Followed by Small Grains

Abstract: All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.

Cited by 20 publications

References 42 publications

Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Winter and growing season nitrogen mineralization from fall-applied composted or stockpiled solid dairy manure

Addition of activated switchgrass biochar to an aridic subsoil increases microbial nitrogen cycling gene abundances

Long‐term water retention increases in degraded soils amended with cross‐linked polyacrylamide

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