Measuring On-Farm Irrigation Efficiency with Chloride Tracing under Deficit Irrigation

Water is a limited resource in agricultural production in arid climates. Under such conditions, high irrigation efficiency can be obtained either through implementation of efficient irrigation systems such as drip or sprinkler systems or through the age-old practice of deficit irrigation with gravity systems. The method used to increase irrigation efficiency is often dictated by economic and/or social factors. In either case, the effectiveness of water management at the farm level needs to be evaluated by measuring irrigation efficiency. The objective of this study was to evaluate the irrigation efficiencies for three crops in Southern New Mexico using the chloride technique. The chloride technique is a simple method in which the natural chloride in the irrigation water is used as a tracer to estimate the leaching fraction and the irrigation efficiency at the farm level. Soil samples were collected from various fields in 15 cm increments to a depth of 180 cm at the end of the irrigation season. The samples were analyzed for moisture and chloride content. In addition to the chloride technique, on-farm irrigation efficiencies were measured using applied water, yield, and water production functions. Water production functions and yields were used to estimate total evapotranspiration while flow measurements were used to calculate the amount of applied water. The results showed that high irrigation efficiency can be accomplished using deficit irrigation. Irrigation efficiency values ranged from 83 to 98%. Irrigation efficiencies using the chloride technique were compared with efficiencies estimated from direct flow measurements. The differences between the two methods ranged from 2 to 11.4%. The results showed that even though the chloride technique is subject to sampling errors and simplified theoretical assumptions, it can be used to estimate on-farm irrigation efficiency with considerable accuracy.     

Emotional Processing During Experiential Treatment of Depression.

This study explored the importance of early and late emotional processing to change in depressive and general symptomology, self-esteem, and interpersonal problems for 34 clients who received 16-20 sessions of experiential treatment for depression. The independent contribution to outcome of the early working alliance was also explored. Early and late emotional processing predicted reductions in reported symptoms and gains in self-esteem. More important, emotional-processing skill significantly improved during treatment. Hierarchical regression models demonstrated that late emotional processing both mediated the relationship between clients' early emotional processing capacity and outcome and was the sole emotional-processing variable that independently predicted improvement. After controlling for emotional processing, the working alliance added an independent contribution to explaining improvement in reported symptomology only. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The pigeon's variability discrimination with lists of successively presented visual stimuli.

Pigeons previously trained to peck 1 button (same) after the successive presentation of 16 identical pictures and to peck a 2nd button (different) after the successive presentation of 16 nonidentical pictures were tested on lists involving different degrees of variability, different list lengths, and different temporal organizations of list items. The pigeons' performances on this successive same-different task revealed a strong sensitivity to list entropy; but, their discrimination was also affected by their memory for list items and by the accumulated evidence for a same versus a different response. Statistical models confirmed and quantified the importance of these additional factors. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Health outcomes for burn survivors: A 2-year follow-up.

Objective: To determine the evolution of health-related function in survivors of burn injuries. Design: Prospective cohort. Measure: Sickness Impact Profile (SIP). Participants: Adults who completed the SIP 1 month (n=237), 1 year (n=183), and 2 years (n=117) after burn injury. Results: Participants reported relatively low sickness impact compared with other medical populations within 1 year of injury. Overall health improved between 1 month and 1 year postinjury, after which it stabilized. Survivors reported worse psychosocial than physical function, regardless of age, gender, burn size, or days hospitalized. Conclusions: Most burn survivors can expect good physical recovery, even after large burn injuries. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comprehensive Soldier Fitness: Building resilience in a challenging institutional context.

The Comprehensive Soldier Fitness (CSF) program is designed to increase psychological strength and positive performance and to reduce the incidence of maladaptive responses of the entire U.S. Army. Based on the principles of positive psychology, CSF is a historically unique approach to behavioral health in a large (1.1 million members) organization. There are four program elements: (a) the assessment of emotional, social, family, and spiritual fitness; (b) individualized learning modules to improve fitness in these domains; (c) formal resilience training; and (d) training of Army master resilience trainers (MRTs) to instill better thinking skills and resilience in their subordinates. In contrast to traditional approaches, CSF is proactive; rather than waiting to see who has a negative outcome following stress, it provides ways of improving resilience for all members of the Army. CSF aims to move the full spectrum of responses to trauma and adversity—ranging from stress-related disorders to ordinary resilience—toward personal growth. This program may provide a model for implementing similar interventions in other very large institutions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Clues to the cognitive organization of reading and writing from developmental hyperlexia.

Controversies regarding the organization of the cognitive systems used for processing written language were investigated in a case study of a mentally retarded hyperlexic child. Despite severe impairments in semantic processing, this child demonstrated intact phonological and orthographic processing. Detailed assessments of his nonword reading abilities provided support for the hypothesis that phonological processing of written words was accomplished by using lexical representations instead of applying nonlexical grapheme-phoneme transcoding rules. Longitudinal investigation of the hyperlexic child's development of writing supports the notion that reading and spelling rely on common mental representations rather than separate input and output mental lexicons. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Mutual achievement strivings: A continuum for mental health.

Mental health is defined in transactional terms, i.e., in terms of the intent of an individual towards equality or mutuality of achievement in relating to others. 4 levels of mutual achievement striving are described and a continuum composed of 8 varieties of intention-transactions is offered. Case histories of 64 patients admitted to a psychiatric hospital were examined to isolate events which could be evaluated in terms of the intention-transaction dimension. Each S was assigned a score on this continuum which reflected his degree of "mental health," and these scores were then compared to a measure of severity of mental illness (see 35: 6569), psychiatric diagnosis, type of treatment recommended, and outcome of treatment. Intention-transaction scores correlated positively with the variables. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Earning its place as a pan-human theory: Universality of the big-fish-little-pond effect across 41 culturally and economically diverse countries.

For more than 2 decades, big-fish-little-pond effect (BFLPE) research has demonstrated that students in high-ability classes and schools have lower academic self-concepts than their equally able counterparts in mixed-ability schools. However, cross-cultural BFLPE research has been limited to mostly developed and individualist countries. Using the Program for International Student Assessment database (Organisation for Economic Co-operation and Development, 2005a, 2005b), the present investigation assessed the BFLPE in 41 culturally and economically diverse countries. In support of the BFLPE, the effect of school-average self-concept was negative for the total sample (effect size = ?.49), negative for each of the 41 countries considered separately, and statistically significant in 38 countries. In this large, culturally diverse sample of countries, the BFLPE was evident in both collectivist and individualist cultures and in economically developing and developed nations. Implications for BFLPE theory and educational practice are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Visuoconstructional problems in dementia: Contribution of executive systems functions.

Visuoconstructional ability was assessed by asking patients diagnosed with Alzheimer's disease (AD), ischaemic vascular dementia (IVD), and Parkinson's disease (PD) and a normal control group (NC) to copy a modification of the Rey–Osterrieth Complex Figure (M–ROCF). The drawings of the NC group were superior to all dementia participants. AD patients generally outperformed LVD and PD patients; however, there were few differences between LVD and PD groups. Nonetheless, the drawings of LVD and PD patients were very fragmented and contained numerous perseverations and omissions. Despite these errors, patients with LVD and PD obtained higher delayed recognition memory scores than AD patients. Correlational analyses among dementia patients between neuropsychological tests and the copy of the M–ROCF found that accurate figure copy was most consistently correlated with tests of working memory, that is, tests requiring patients to monitor their behavior and sustain a complex mental set while performing mental manipulations. By contrast, no relationship between executive function tests related to measures of response selection/inhibition or other domains of neuropsychological functioning was found. (PsycINFO Database Record (c) 2010 APA, all rights reserved)