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The adoption of cover crop production systems is lagging in the mid-southern USA due to concerns over yield stability and on-farm profitability. This research was conducted to determine if the inclusion of a cover crop in conservation tillage systems improves yield, profitability, and water use efficiency. The effects of replacing subsoiling with a cereal rye (Secale cereale L.) or tillage radish (Raphanus sativus L. var. longipinnatus) cover crop on soybean [Glycine max (L.) Merr.] grain yield, net returns above specified costs, and water use efficiency were evaluated in a conservation tillage system, i.e., surface residue = 30% at planting, on a Dubbs silt loam (Fine-silty, mixed, active, thermic Typic Hapludalfs) from 2016 to 2018 near Stoneville, MS. Relative to the conservation tillage system with subsoiling, the replacement of subsoiling with a tillage radish cover crop reduced soybean grain yield, net returns above specified costs, and water use efficiency by up to 41% (P = 0.0266). Conversely, the replacement of subsoiling with a cereal rye cover crop had no effect on soybean grain yield or water use efficiency but reduced net returns above specified costs by 28% (P = 0.0266). In the mid-southern USA, a cereal rye cover crop can maintain soybean grain yield and water use efficiency relative to the regional standard, but widespread adoption of this production system is unlikely due to reduced profitability associated with additional seed and planting costs.

Recent studies have suggested that giving opioids locally into inflamed tissue may cause analgesia. This antinociceptive effect has been attributed to the interaction of the drug with opioid receptors upregulated by inflammation in the peripheral tissues. We have compared the analgesic effect of intra-articular morphine with that of normal saline and a combination of morphine and its antagonist naloxone after arthroscopy of the temporomandibular joint (TMJ). Twenty-one patients took part in a randomized controlled double-blind trial and received one of these three solutions at the end of operation. The pain scores, time to the first request for analgesia, and the analgesic consumption of the patients in the three groups did not differ significantly at any time during the study period.

Recent changes in the classification of psychiatric illnesses have resulted in the term dysmorphophobia being replaced by that of body dysmorphic disorder (BDD). This paper attempts to alert the clinician to the presenting features of the condition and discusses its management, with particular emphasis on the role of surgery and current concepts of pharmacological treatment. A number of case reports are included to illustrate the diversity of this interesting disorder and the difficulties involved in treatment.

Two digital X-ray imaging systems developed at the Rutherford Appleton Laboratory are described: the Mark I and the Mark II. Both use a bidimensionally sensitive multiwire proportional counter (MWPC) as the basic X-ray image transducer coupled, in the case of the Mark I to a Digital LSI 11–23 microcomputer system via CAMAC, and in the case of the Mark II to a Digital LSI 11–73 microcomputer system via custom-built data acquisition hardware mounted directly on the Q-bus of the microcomputer. The Mark I system provides the advantages of high speed, high sensitivity digital imaging directly into the computer with the potential for software control of the sample orientation and environment. The Mark II system adds the novel features of signal averaging and multiframe exposures. The dedicated digital memories have a resolution of 512×512 pixels of 16 bits, matching well to the spatial resolution of the xenon-filled MWPC (0.5 mm fwhm over an aperture of 200 mm×200 mm). A 512×512×4 bit video graphics system displays the images in grey scales or colour.