11 Result(s)
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Michael L. Thompson
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Article
Climate and soil pH control the reduction of cadmium in rice during 7 years of biannual liming
Liming is widely known as a cost-efficient agricultural practice to reduce cadmium (Cd) concentration in rice (Oryza sativa L.) grain (CdR) in the short term. However, the effect of long-term continuous liming on...
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Article
Soil C:N:P ratio in subtropical paddy fields: variation and correlation with environmental controls
Paddy soils may play an essential role in global greenhouse gas mitigation and food security; however, ecological indices of soil organic carbon (C), total nitrogen (N), and total phosphorus (P), and their env...
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Chapter and Conference Paper
Using Soil Tests to Evaluate Plant Availability of Potassium in Soils
The purpose of this chapter is to describe how bioavailable soil K is assessed or predicted by soil tests. Soil testing commonly refers to the collection of a sample of soil representative of a field or agrono...
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Chapter and Conference Paper
Considering Soil Potassium Pools with Dissimilar Plant Availability
Soil potassium (K) has traditionally been portrayed as residing in four functional pools: solution K, exchangeable K, interlayer (sometimes referred to as “fixed” or “nonexchangeable”) K, and structural K in p...
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Article
Open AccessSoil labile organic carbon fractions and soil enzyme activities after 10 years of continuous fertilization and wheat residue incorporation
Labile organic carbon (LOC) fractions and related enzyme activities in soils are considered to be early and sensitive indicators of soil quality changes. We investigated the influences of fertilization and res...
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Article
Open AccessPhosphorus transformations in stream bank sediments in Iowa, USA, at varying redox potentials
Stream bank erosion is one of the main sources of suspended sediments in stream water, and it often carries phosphorus with it. With a controlled laboratory study, we investigated the changes in different form...
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Article
Inorganic and Organic Phosphorus in Sediments in the Walnut Creek Watershed of Central Iowa, USA
The dynamics of phosphorus (P) reactions in stream water are important because of their potential to trigger eutrophication. This study aimed to explore the nature of P in sediments associated with Walnut Cree...
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Article
Phosphorus source—sink relationships of stream sediments in the Rathbun Lake watershed in southern Iowa, USA
The surface waters of Rathbun Lake watershed in southern Iowa are impacted by agricultural sources of sediments and nutrients, including phosphorus (P). Because stream sediments often play an important role in...
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Article
Chronic morphine administration augments benzodiazepine binding and GABAA receptor function
Behavioral and neurochemical evidence indicates links between the opioid and GABA neurotransmitter systems. To assess effects of chronic opiates on the major site of postsynaptic GABAergic activity, the GABAA rec...
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Chapter
Short and Long Term Physiological and Neurochemical Adaptations to Social Conflict
Social conflict engenders behavioral and physiological phonemena that are relevant to the concept of stress. Attack and threat by an opponent leads to profound behavioral, physiological and neurochemical react...
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Article
Naloxone injections into the periaqueductal grey area and arcuate nucleus block analgesia in defeated mice
In a situation of social conflict, mice that are defeated by an opponent exhibit a marked analgesia. Microinjections of naloxone (1 or 10 μg) into the periaqueductal grey area (PAG) or into the region of the a...
