Evaluation of a microplate spectrophotometer for soil organic carbon determination in south‐central Idaho

Bierer, Andrew M.; Leytem, April B.; Rogers, Christopher W.; Dungan, Robert S.

doi:10.1002/saj2.20165

Cited by 14 publications

(10 citation statements)

References 45 publications

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“…The NO 3 − ‐N was determined by extracting the soil with calcium chloride and measuring the N concentration in the extract in a flow injection analyzer (FIA) (Houba et al., 2000). The SOM was determined using the loss‐on‐ignition method (Bierer et al., 2021; Nelson & Sommers, 1996; Schulte & Hopkins, 1996). The SOM determination was based on gravimetric weight loss caused by the oxidation of SOM in a high‐temperature reaction.…”

Section: Methodsmentioning

confidence: 99%

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

Sapkota

Ghimire

Angadi

et al. 2023

Soil Science Soc of Amer J

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Decline in water table in the Ogallala Aquifer, along with soil degradation, has threatened the sustainability of agriculture in the US High Plains region. Circular grass buffers in center pivot irrigated cropping systems could support sustainable crop production by providing multiple ecosystem services. This study evaluated soil organic matter (SOM), nutrients, and other selected soil health indicators under circular buffer strip grasses (BSG), adjacent buffer strip corn (Zea mays L.) (BSC), and continuous conventional corn (CCC) in the 0-80 cm soil profile. Soil samples were collected from the center of corn and grass strips for 5 years (2017-2021) and analyzed for nitrate N (NO 3 − -N), soil pH, electrical conductivity, cation exchange capacity, SOM, and soil nutrients. The NO 3 − -N under CCC in 0-20 cm (18.4 mg kg −1 ) and 60-80 cm (4.97 mg kg −1 ) were 1.56 and 1.96 times higher than BSC.The NO 3 − -N was significantly lower under BSG than other treatments in 0-20 cm, 20-40, and 40-60 cm depths. The SOM was similar among all treatments. Response of other nutrients varied among treatments and inter-annually. Soil pH in 0-20 cm depth was 0.1 and 0.3 units lower in CCC (pH = 7.7) than in BSC and BSG. Soil electrical conductivity was 37.5% and 25% greater in CCC than BSG (0.24 and 0.24 dS m −1 ) in 0-20 and 20-40 cm depths, respectively. Grass buffer strips maintaining SOM despite no irrigation, less residual N under corn with grass buffer, and less rapid changes in soil pH suggest the potential of grass buffer to maintain soil health in semi-arid cropping systems facing the transition to dryland.

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Section: Methodsmentioning

confidence: 99%

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

Sapkota

Ghimire

Angadi

et al. 2023

Soil Science Soc of Amer J

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“…The alkali‐hydrolyzable nitrogen (AN) and available phosphorous (AP) were determined by the alkali‐hydrolyzed reduction diffusing method and colorimetric assay method, respectively (Yu et al, 2022). Soil organic carbon (SOC) was measured by the potassium dichromate oxidation‐spectrophotometric method (Bierer et al, 2021). Soil total carbon (TC) and dissolved organic carbon (DOC) were quantified on a CHNOS elemental analyzer (Vario EL, Germany) and TOC analyzer (Shimadzu TOC‐VCPH, Japan), respectively.…”

Section: Methodsmentioning

confidence: 99%

Effects of ecological restoration on carbon sink and carbon drawdown of degraded salt marshes with carbon‐rich additives application

Chen

Bai

et al. 2022

Land Degrad Dev

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Plant biomass resources have been gradually used to restore and improve saline soils. However, little is known about whether the applications of reed straw (PA) and biochar (BC) in degraded coastal salt marshes are beneficial for blue carbon sink enhancement and carbon drawdown. Here, we evaluated the effects of 3% PA and 3% BC applications on the vegetation, soil and blue carbon sink function of degraded salt marsh ecosystems and assessed their CO2 reduction capacities based on the life cycle. The results showed that the applications of PA and BC improved the soil quality of degraded salt marshes. Suaeda salsa recovered after 3% PA and 3% BC additions, and its carbon sequestration increased by 133% and 12%, respectively. The carbon pool of the degraded salt marshes was elevated by 0.4%–2.8% compared with that before restoration. The structural equation modelling indicated that both PA and BC application decreased soil electrical conductivity, while promoted the recovery of the plant carbon pool and an increase in the soil carbon pool. We calculated a CO2 drawdown of 137 kg·t−1 for the 3% PA addition in comparison with a CO2 emission of 175 kg·t−1 for the 3% BC addition based on a life cycle assessment. These findings indicate that PA and BC can be effectively used to restore degraded salt marshes and enhance blue carbon sinks while PA application is a better choice for degraded coastal wetlands rehabilitation to achieve carbon drawdown from a life cycle perspective.

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“…Organic carbon was determined by the Walkley-Black method ( Bierer et al, 2020 ). The percentage of organic matter was used to calculate the organic carbon content by using the conversion factor 1.724 and the fact that 58% of the soil organic matter is the average content of carbon.…”

Section: Methodsmentioning

confidence: 99%

Bambara Groundnut Rhizobacteria Antimicrobial and Biofertilization Potential

et al. 2022

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Bambara groundnut, an underutilized crop has been proved to be an indigenous crop in Africa with the potential for food security. The rhizosphere of Bambara groundnut contains Rhizobacteria, with the ability to grow, adapt, and colonize their surroundings even in unfavorable conditions and have not been explored for their plant growth-promoting properties. The aim of this research was to determine the potential of rhizobacteria from Bambara groundnut soil samples as either biofertilizers or biocontrol agents or both to help provide sustainable agriculture in Africa and globally. Bambara groundnut rhizospheric soil samples were collected and analyzed for their chemical composition. Rhizobacteria isolates were cultured from the soil samples. Plant growth-promoting, antifungal activities and phylogenetic analysis using 16S rRNA were carried out on the isolates to identify the rhizobacteria. A 2-year field study planting was carried out to determine the effect of these rhizobacteria as biofertilizers for Bambara groundnut (Vigna subterranean). The study was carried out in a complete randomized block experimental design with three replications. All the isolates were able to produce ammonia and 1-aminocyclopropane-1-carboxylate, while 4.65, 12.28, and 27.91% produced hydrogen cyanide, indole acetic acid, and solubilized phosphate, respectively, making them important targets as biocontrol and biofertilizer agents. The field results revealed that treatment with rhizobacteria had significant results compared with the control. Characterization of selected isolates reveals their identity as B. amyloliquefaciens, B. thuringiensis, and Bacillus sp. These Bacillus isolates have proved to be plant growth-promoting agents that can be used as biofertilizers to enhance the growth of crops and consequent improved yield. This is the first time the rhizobacteria from the Bambara groundnut rhizosphere are applied as biofertilizer.

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Evaluation of a microplate spectrophotometer for soil organic carbon determination in south‐central Idaho

Cited by 14 publications

References 45 publications

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

Soil health responses of circular grass buffer strips in center‐pivot irrigated agriculture

Effects of ecological restoration on carbon sink and carbon drawdown of degraded salt marshes with carbon‐rich additives application

Bambara Groundnut Rhizobacteria Antimicrobial and Biofertilization Potential

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