Greening Income Support and Supporting Green

A multitude of design decisions influence the performance of voluntary conservation programs. This Economic Brief is one of a set of five exploring the implications of decisions policymakers and program managers must make about who is eligible to receive payments, how much can be received, for what action, and the means by which applicants are selected. In particular, this Brief focuses on potential tradeoffs in combining income support and environmental objectives in a single program.Agricultural and Food Policy, Environmental Economics and Policy,

Root Development of Soybeans

New information on growth patterns of soybean roots and guidelines for fertilizer placement and cultivation come from a study by the Iowa State agronomy department

The Need, Development and Implementation of a Student/Parent Handbook for Warrensburg-Latham High School

The project selected for completion of my degree evolved from numerous situations experienced during my first year as Assistant Principal at Warrensburg-Latham High School, where I was primarily responsible for dealing with student discipline. Early in the school year it became evident that the existing student handbook was not as diverse or explicit as I felt should be necessary. In continual discussions with the principal it was concluded that a new student handbook should be implemented for the following school term. I operated through the remainder of the 1978-79 school year with the existing laminated folder type handbook, which consistently proved to be difficult to utilize. The methods used to collect information and create guidelines for developing a new handbook were varied. Certainly the existing information would be included where appropriate, but a great deal of new or revised material would be adopted from situations and problems faced during the routine operation of the current school year. Teacher input was solicited and discussions with colleagues served a useful function. The final source for compiling pertinent information was derived from other districts\u27 handbooks. Many items in the new Warrensburg-Latham Student/Parent Handbook came from various sections of other handbooks. It was significant that our new handbook was a Student-Parent Handbook. The policy that parents should read the rules and procedures was stressed to the student body and it was expected of each student to make the handbook available to his or her parents. The disciplinary situations faced under the new handbook seemed significantly more effectively handled. It was felt the handbook, in itself, was a factor in a more positive atmosphere, with the student body more clearly aware of what the school considered reasonable or acceptable conduct

Igneous Rock Associations 26. Lamproites, Exotic Potassic Alkaline Rocks: A Review of their Nomenclature, Characterization and Origins

Lamproite is a rare ultrapotassic alkaline rock of petrological importance as it is considered to be derived from metasomatized lithospheric mantle, and of economic significance, being the host of major diamond deposits. A review of the nomenclature of lamproite results in the recommendation that members of the lamproite petrological clan be named using mineralogical-genetic classifications to distinguish them from other genetically unrelated potassic alkaline rocks, kimberlite, and diverse lamprophyres. The names “Group 2 kimberlite” and “orangeite” must be abandoned as these rock types are varieties of bona fide lamproite restricted to the Kaapvaal Craton. Lamproites exhibit extreme diversity in their mineralogy which ranges from olivine phlogopite lamproite, through phlogopite leucite lamproite and potassic titanian richterite-diopside lamproite, to leucite sanidine lamproite. Diamondiferous olivine lamproites are hybrid rocks extensively contaminated by mantle-derived xenocrystic olivine. Currently, lamproites are divided into cratonic (e.g. Leucite Hills, USA; Baifen, China) and orogenic (Mediterranean) varieties (e.g. Murcia-Almeria, Spain; Afyon, Turkey; Xungba, Tibet). Each cratonic and orogenic lamproite province differs significantly in tectonic setting and Sr–Nd–Pb–Hf isotopic compositions. Isotopic compositions indicate derivation from enriched mantle sources, having long-term low Sm/Nd and high Rb/Sr ratios, relative to bulk earth and depleted asthenospheric mantle. All lamproites are considered, on the basis of their geochemistry, to be derived from ancient mineralogically complex K–Ti–Ba–REE-rich veins, or metasomes, in the lithospheric mantle with, or without, subsequent contributions from recent asthenospheric or subducted components at the time of genesis. Lamproite primary magmas are considered to be relatively silica-rich (~50–60 wt.% SiO2), MgO-poor (3–12 wt.%), and ultrapotassic (~8–12 wt.% K2O) as exemplified by hyalo-phlogopite lamproites from the Leucite Hills (Wyoming) or Smoky Butte (Montana). Brief descriptions are given of the most important phreatomagmatic diamondiferous lamproite vents. The tectonic processes which lead to partial melting of metasomes, and/or initiation of magmatism, are described for examples of cratonic and orogenic lamproites. As each lamproite province differs with respect to its mineralogy, geochemical evolution, and tectonic setting there is no simple or common petrogenetic model for their genesis. Each province must be considered as the unique expression of the times and vagaries of ancient mantle metasomatism, coupled with diverse and complex partial melting processes, together with mixing of younger asthenospheric and lithospheric material, and, in the case of many orogenic lamproites, with Paleogene to Recent subducted material.La lamproïte est une roche alcaline ultrapotassique rare d'importance pétrologique car elle est considérée comme dérivée du manteau lithosphérique métasomatisé, et d'importance économique, étant l'hôte de gisements de diamants majeurs. Un examen de la nomenclature des lamproïtes conduit à la recommandation que les membres du clan pétrologique des lamproïtes soient nommés en utilisant des classifications minéralogiques génétiques pour les distinguer des autres roches alcalines potassiques génétiquement non liées, de la kimberlite et de divers lamprophyres. Les noms « kimberlite du groupe 2 » et « orangéite » doivent être abandonnés car ces types de roches sont des variétés de véritables lamproïtes restreintes au craton de Kaapvaal. Les lamproïtes présentent une extrême diversité dans leur minéralogie qui va de la lamproïte à phlogopite et olivine, à la lamproïte à leucite et phlogopite et de la lamproïte à richtérite-diopside potassique titanifère, à la lamproïte à sanidine et leucite. Les lamproïtes à olivine diamantifères sont des roches hybrides largement contaminées par l'olivine xénocristique dérivée du manteau. Actuellement, les lamproïtes sont divisées en variétés cratoniques (par exemple Leucite Hills, États-Unis; Baifen, Chine) et orogéniques (méditerranéennes) (par exemple Murcie-Almeria, Espagne; Afyon, Turquie; Xungba, Tibet). Chaque province de lamproïte cratonique et orogénique diffère significativement par le contexte tectonique et les compositions isotopiques en Sr, Nd, Pb et Hf. Les compositions isotopiques indiquent que leur source est un manteau enrichi, ayant à long terme des rapports Sm/Nd bas et Rb/Sr élevés, par rapport à la Terre globale et au manteau asthénosphérique appauvri. Toutes les lamproïtes sont considérées, sur la base de leur géochimie, comme étant dérivées d'anciennes veines minéralogiquement complexes riches en K, Ti, Ba et ETR, ou métasomes, dans le manteau lithosphérique avec ou sans contributions ultérieures de composants asthénosphériques ou subductés récents au moment de la genèse. Les magmas primaires de lamproïte sont considérés comme relativement riches en silice (~ 50–60% en poids de SiO2), pauvres en MgO (3–12% en poids) et ultrapotassiques (~ 8–12% en poids de K2O) comme le montrent les lamproïtes hyalo à phlogopite de Leucite Hills (Wyoming) ou de Smoky Butte (Montana). De brèves descriptions sont données des cheminées de lamproïtes diamantifères phréatomagmatiques les plus importantes. Les processus tectoniques qui conduisent à la fusion partielle des métasomes et / ou à l'initiation du magmatisme sont décrits comme des exemples de lamproïtes cratoniques et orogéniques. Comme chaque province de lamproïte diffère en ce qui concerne sa minéralogie, son évolution géochimique et son cadre tectonique, il n'y a pas de modèle pétrogénétique simple ou commun pour leur genèse. Chaque province doit être considérée comme l'expression unique de l'époque et des caprices du métasomatisme du manteau ancien, associée à des processus de fusion partielle divers et complexes, ainsi qu'à un mélange de matériaux asthénosphériques et lithosphériques plus jeunes et, dans le cas de nombreuses lamproïtes orogéniques, à du matériel paléogène à récent subducté.

A Look at Some Potential New Crops for Iowa

Two new oil seeds, Crambe abyssinica and Veronia anthelmintica, and two new fiber plants, Kenaf and sorghum, may offer clues of plants that could fill some part of the extra acreage available for crop production

The Need, Development and Implementation of a Student/Parent Handbook for Warrensburg-Latham High School

The project selected for completion of my degree evolved from numerous situations experienced during my first year as Assistant Principal at Warrensburg-Latham High School, where I was primarily responsible for dealing with student discipline. Early in the school year it became evident that the existing student handbook was not as diverse or explicit as I felt should be necessary. In continual discussions with the principal it was concluded that a new student handbook should be implemented for the following school term. I operated through the remainder of the 1978-79 school year with the existing laminated folder type handbook, which consistently proved to be difficult to utilize. The methods used to collect information and create guidelines for developing a new handbook were varied. Certainly the existing information would be included where appropriate, but a great deal of new or revised material would be adopted from situations and problems faced during the routine operation of the current school year. Teacher input was solicited and discussions with colleagues served a useful function. The final source for compiling pertinent information was derived from other districts\u27 handbooks. Many items in the new Warrensburg-Latham Student/Parent Handbook came from various sections of other handbooks. It was significant that our new handbook was a Student-Parent Handbook. The policy that parents should read the rules and procedures was stressed to the student body and it was expected of each student to make the handbook available to his or her parents. The disciplinary situations faced under the new handbook seemed significantly more effectively handled. It was felt the handbook, in itself, was a factor in a more positive atmosphere, with the student body more clearly aware of what the school considered reasonable or acceptable conduct

Agronomy, soils and atmospheric science at the University of Missouri : 100 years, 1904-2004 : centennial celebration June 25-26, 2004

Prepared by Roger L. Mitchell with major recognition to three sources (Poehlman, Woodruff, Decker), which are utilized extensively for the early history and with special thanks to all the current faculty for their suggestions of major themes and successes as well as assisting in a summary of their current work--P. [2] of cover.Includes bibliographical references (page [ii])