Acidification in the inland Pacific Northwest

McFarland, Carol; Huggins, David R.

doi:10.2134/cs2015-48-2-1

Cited by 7 publications

(6 citation statements)

References 6 publications

(5 reference statements)

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“…Higher soil pH in deep soil depths has been reported elsewhere in arable soils (Hamkalo & Bedernichek, 2014;Peng & Huggins, 2021). The higher soil pH and moisture in the deeper soils were accompanied by Ca, Mg, and Na concentrations, which is common in dryland wheat cropping systems and in Mollisol soil orders due to the long-term leaching of base cations with mobile anions (Mcfarland & Huggins, 2015). Soil pH strongly impacts base cation accumulation and SOM stabilization mechanisms (Rasmussen et al, 2018).…”

Section: Soil Health With Depth In the Palouse Soil Seriesmentioning

confidence: 65%

Soil profile health in the Palouse soil series: Carbon, nitrogen, nutrients, and aggregates

Naasko,

Pan,

Reganold

et al. 2023

Agrosystems Geosci & Env

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Deep soil health (>30 cm) supports deep roots in dryland wheat cropping systems. However, few studies examine how tillage and climate impact soil health indicators deeper than 30 cm in dryland wheat systems. We evaluated how select soil chemical (i.e., nutrients and pH), biological (i.e., carbon [C] and nitrogen [N] fractions and ratios), and physical (i.e., mean weight diameter [MWD] of soil aggregates) health indicators were impacted by depth, tillage, and climate. We sampled soil profiles of the Palouse soil series from 0‐ to 85 cm in depth at three no‐till (NT) and three conventional till (CT) sites across a mean annual precipitation (MAP) gradient (460–660 mm) in the Palouse River watershed. NT sites, compared to CT sites, had higher total C (TC) and N (TN), permanganate oxidizable C, hot‐water extractable C and N, and cold‐water extractable N (0–5 cm); greater soil moisture (0–29 cm); larger MWD (0–5 cm; 10–85 cm); but lower soil pH (0–10 cm; 59–85 cm); less TC, TN, and NO3− (29–85 cm); less NH4+ and mineralizable soil C (MINC) (29–59 cm); and lower autoclaved‐citrate extractable (ACE) protein (0–5 cm; 29–85 cm). Sites with higher MAP had greater soil moisture (0–29 cm), higher MINC (0–85 cm), lower CWC (5–10 cm; 29–59 cm), and lower TC and ACE protein (29–85 cm). The variable effects of tillage and climate on these soil health indicators with soil depth show the importance of evaluating soil health in both surface and subsurface soil depths in dryland wheat cropping systems.

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Section: Soil Health With Depth In the Palouse Soil Seriesmentioning

confidence: 65%

Soil profile health in the Palouse soil series: Carbon, nitrogen, nutrients, and aggregates

Naasko,

Pan,

Reganold

et al. 2023

Agrosystems Geosci & Env

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“…In low‐N soils, yields and protein may increase with starter N or inoculant, but until protein is more commonly rewarded with higher prices, the reward may not offset the cost. Yet, the risk of crop failure due to low N or failed nodulation may not be worth skimping on inoculant or low rates of starter N. For example, given soil acidification in the soil surface is a growing problem in traditionally neutral to alkaline soils (McFarland and Huggins, 2015; Sullivan et al, 2013; Engel, unpublished data), it may pay to test the pH of the surface soil and apply a granular inoculant if the soil is acidic.…”

Section: Economicsmentioning

confidence: 99%

Inoculation and nitrogen management to optimize pulse crop yield and protein

Jones¹,

Olson-Rutz

2018

Crops & Soils

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Pulse crops require nitrogen (N) either from the soil or through N gas fixation by rhizobia bacteria in nodules on their roots. This article will discuss the factors affecting nodulation and N fixation, different inoculant types and their effect on yield and protein, starter and rescue N along with the need for other nutrients, and how the economics play out. Earn 1 CEU in Nutrient Management by reading this article and taking the quiz at http://www.certifiedcropadviser.org/education/classroom/classes/597.

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“…Acidic soils are widespread in the world and it is estimated that acidic soils impact over 70% of cultivable and potentially arable land ( von Uexküll and Mutert, 1995 ; Baligar et al, 2001 ). Soil acidification is a major environmental challenge for crop production in the Inland Pacific Northwest (IPNW) ( McFarland and Huggins, 2015 ; Ghimire et al, 2017 ), and is a major constraint on plant productivity ( Koenig et al, 2013 ). Continuous use of ammonium-based nitrogen fertilizers and long-term continuous crop growth has caused soil pH to drop below optimum levels for crop production ( Schroder et al, 2011 ; Jones et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Responses of Soil Fungal Communities to Lime Application in Wheat Fields in the Pacific Northwest

et al. 2021

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Liming is an effective agricultural practice and is broadly used to ameliorate soil acidification in agricultural ecosystems. Our understanding of the impacts of lime application on the soil fungal community is scarce. In this study, we explored the responses of fungal communities to liming at two locations with decreasing soil pH in Oregon in the Pacific Northwest using high-throughput sequencing (Illumina MiSeq). Our results revealed that the location and liming did not significantly affect soil fungal diversity and richness, and the impact of soil depth on fungal diversity varied among locations. In contrast, location and soil depth had a strong effect on the structure and composition of soil fungal communities, whereas the impact of liming was much smaller, and location- and depth-dependent. Interestingly, families Lasiosphaeriaceae, Piskurozymaceae, and Sordariaceae predominated in the surface soil (0–7.5 cm) and were positively correlated with soil OM and aluminum, and negatively correlated with pH. The family Kickxellaceae which predominated in deeper soil (15–22.5 cm), had an opposite response to soil OM. Furthermore, some taxa in Ascomycota, such as Hypocreales, Peziza and Penicillium, were increased by liming at one of the locations (Moro). In conclusion, these findings suggest that fungal community structure and composition rather than fungal diversity responded to location, soil depth and liming. Compared to liming, location and depth had a stronger effect on the soil fungal community, but some specific fungal taxa shifted with lime application.

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Acidification in the inland Pacific Northwest

Cited by 7 publications

References 6 publications

Soil profile health in the Palouse soil series: Carbon, nitrogen, nutrients, and aggregates

Soil profile health in the Palouse soil series: Carbon, nitrogen, nutrients, and aggregates

Inoculation and nitrogen management to optimize pulse crop yield and protein

Responses of Soil Fungal Communities to Lime Application in Wheat Fields in the Pacific Northwest

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