Hampshire College

About: Hampshire College is a education organization based out in Amherst Center, Massachusetts, United States. It is known for research contribution in the topics: Genetic programming & Population. The organization has 461 authors who have published 998 publications receiving 40827 citations.

Soil Organic Matter Characteristics as Affected by Tillage Management

Abstract: ganic C (SOC). Soils of the southeastern United States of America, particularly sandy Coastal Plain soils, have Soil organic matter (SOM) is of primary importance for maintaining inherently low SOC contents (typically below 1%, Hunt soil productivity, and agricultural management practices may signifiet al., 1982). Consequently, small changes in the SOM cantly influence SOM chemical properties. However, how SOM chemical characteristics change with agricultural practices is poorly under- content are significant to the agricultural production of stood. Therefore, in this study, we evaluated the impacts of tillage the region. An evaluation of tillage and crop residue (conventional vs. conservation) management on the structural and management practices to rebuild SOC levels has been compositional characteristics of SOM using cross-polarization magic- conducted by Hunt et al. (1996). These researchers monangle-spinning (CPMAS) and total sideband suppression (TOSS) itored changes in SOC levels in numerous small tillage solid-state 13 C nuclear magnetic resonance (NMR) and diffuse reflec- plots and found that after 9 yr of CnT, the SOC content tance Fourier transform infrared (DRIFT) spectroscopy. We charac- in the top few centimeters was significantly higher than terized both physically and chemically isolated SOM fractions from a the soil under CT management. Campbell et al. (1999) Norfolk soil (fine-loamy, siliceous, thermic Typic Kandiudults) under

The origins of agriculture: population growth during a period of declining health.

Abstract: The increase in the Neolithic human population following the development of agriculture has been assumed to result from improvements in health and nutrition. Recent research demonstrates that this assumption is incorrect. With the development of sedentism and the intensification of agriculture, there is an increase in infectious disease and nutritional deficiencies particularly affecting infants and children. Declining health probably increased mortality among infants, children and oldest adults. However, the productive and reproductive core would have been able to respond to this increase in mortality by reducing birth spacing. That is, agricultural populations increased in size, despite higher mortality, because intervals between births became shorter.

Sibling conflict in middle childhood predicts children's adjustment in early adolescence.

Abstract: Associations between sibling conflict in middle childhood and psychological adjustment in early adolescence were studied in a sample of 80 boys and 56 girls. Parents and children provided self-report data about family relationships and children's adjustment. Parents' hostility to children was assessed from videotaped interactions. Results showed that sibling conflict at Time 1 predicted increases in children's anxiety, depressed mood, and delinquent behavior 2 years later. Moreover, earlier sibling conflict at Time 1 accounted for unique variance in young adolescents' Time 2 anxiety, depressed mood, and delinquent behavior above and beyond the variance explained by earlier maternal hostility and marital conflict. Children's adjustment at Time 1 did not predict sibling conflict at Time 2. Results highlight the unique significance of the earlier sibling relationship for young adolescents' psychological adjustment.

Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures

Abstract: This reference contains almost 6000 entries dealing with the history of the scientific, technological and medical accomplishments of cultures outside of the USA and Europe. It aims to bring together knowledge of many disparate fields in one place and to legitimize the study of other cultures' science. No superiority is claimed for other cultures, rather the aim is a mutual exchange of ideas. There are inter-cultural articles on a broad range of topics, such as mathematics and astronomy; philosophical articles on concepts and ideas related to the study of non-Western science, such as rationality, objectivity and method, religion and science, East and West, and magic and science; and more factual ones on topics such as China and the Islamic world, where individual scientists are known to us. Readers can compare disciplines across cultures (Chinese mathematics, trigonometry, maps, medicine, geography etc), and cultures across disciplines (for example, Islamic, Chinese, Indo-Malay, African, and native American astronomy). The entries are arranged alphabetically, with many cross-references, and bibliographies enable readers to move on to the scholarly literature.