Alternative aircraft fuels

The efficient utilization of fossil fuels by future jet aircraft may necessitate the broadening of current aviation turbine fuel specifications. The most significant changes in specifications would be an increased aromatics content and a higher final boiling point in order to minimize refinery energy consumption and costs. These changes would increase the freezing point and might lower the thermal stability of the fuel, and could cause increased pollutant emissions, increased combustor liner temperatures, and poorer ignition characteristics. The effects that broadened specification fuels may have on present-day jet aircraft and engine components and the technology required to use fuels with broadened specifications are discussed

The relationship of soil color to soil moisture tension

Color is an obvious and easily described soil characteristic. Probably man has always been conscious of soil color as he observed the color of good crop soils, those good for making brick, those that were good home sites and those good for gardens. Many such uses have related soil color to man\u27s culture and economy. Common terms such as red dust or black mud are used to describe soil out of place in a home, but important soil names have come from the colors. Chemosem (black earth), terra rosa (red earth), brown loams, black prairie soils and brown forest soils are examples of large soil areas named for their color. Color is the most easily observed of soil properties and observance of color is very useful. If properly interpreted it is an indication of drainage, aeration, climate, age, parent material and to some extent, fertility. Soil color is changed by soil moisture. The objective of this work was to investigate by trials the changes of soil color that might be associated with changes in soil moisture tension. If the soil color changes sufficiently over the available moisture range, then soil color could be used as a measure of available soil moisture

Jet aircraft hydrocarbon fuels technology

A broad specification, referee fuel was proposed for research and development. This fuel has a lower, closely specified hydrogen content and higher final boiling point and freezing point than ASTM Jet A. The workshop recommended various priority items for fuel research and development. Key items include prediction of tradeoffs among fuel refining, distribution, and aircraft operating costs; combustor liner temperature and emissions studies; and practical simulator investigations of the effect of high freezing point and low thermal stability fuels on aircraft fuel systems

Missouri commercial fertilizers : inspection and analysis, 1954

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Fertilizer inspection and analysis, fall 1949

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Building workable programs of land use and improvement for Missouri : sixty-five years of research, teaching and farm demonstration work by the Missouri College of Agriculture

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Use of commercial plant foods on Missouri farms

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Fertilizer inspection and analysis, spring, 1951

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Fertilizer inspection and analysis 1953

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