Scholarship & Research
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Item Water relations in highly calcareous very gravelly soils(Montana State University - Bozeman, College of Agriculture, 1978) McLean, Daniel LyleItem Drill application of ammonium phosphate fertilizers with the seed of irrigated barley on calcareous soils(Montana State University - Bozeman, College of Agriculture, 1978) Franklin, J. D.Item Effects of precipitated calcium carbonate from sugar purification on crusting soils(Montana State University - Bozeman, College of Agriculture, 1996) Inkret, John MatthewPrecipitated calcium carbonate (PCC), a by-product of the sugar industry, results from a sucrose juice purification technique. This material has several properties that distinguish it from geological calcite. These properties include an organic load, high water-holding capacity, small particle size, high surface area, and uniformity. A large stockpile of PCC is located at the Holly Sugar refinery in Sidney, Montana. This study was initiated at the request of Holly Sugar to investigate potential PCC application as a soil amendment to local agricultural soils that exhibit surface crusting. Soil surface crusts, initiated by precipitation events, are common in Eastern Montana. These crusts can significantly inhibit crop seedling emergence. This study was designed to evaluate the potential of PCC to ameliorate crust formation in eastern Montana agricultural soils. Bulk soil samples from four different sites and stockpile PCC samples were collected for evaluation. Amendment (PCC) and the four soils were then physically and chemically characterized. Soil crust formation and strength of amended and control soils were evaluated in the laboratory and greenhouse by inducing crust formation and then measuring and analyzing specific soil crust properties and parameters. Soil areal extensibilities from saturated to dry moisture conditions were measured and evaluated. Outdoor trials evaluated seedling emergence success and surface crust strength. Greenhouse trials evaluated seedling emergence and the areal extent of soil surface fractures by a photographic quantification technique. The addition of PCC, at the rates tested, did not ameliorate the problematic physical characteristic of the soils. Soil crusting was not reduced by the amendments used in this study.Item Water retention and flow characteristics of six calcarious soils of Montana(Montana State University - Bozeman, College of Agriculture, 1987) Browne, Michael FrankItem The influence of calcium carbonate on the availability and plant uptake of potassium in Montana soils(Montana State University - Bozeman, College of Agriculture, 1991) Moore, Thomas GlenItem Diffuse reflectance spectroscopy for the characterization of calcareous glacial till soils from north central Montana(Montana State University - Bozeman, College of Agriculture, 2006) Steward, Genevieve Christine; Chairperson, Graduate Committee: David Brown.Diffuse reflective spectroscopy (DRS) is a method of soil carbon (C) quantification. In this study, the Vis-NIR (350 - 2500 nm) and MIR (2500-25000 nm) regions were evaluated to determine respective predictive accuracies of soil organic and inorganic carbon (SOC and SIC, respectively). The dataset included 315 soil samples of glacial till origin, obtained from six independent farm sites within the Golden Triangle region of Montana, with depths ranging from 0-100 cm. For Vis-NIR analysis, Local vs. Regional vs. Global calibration sets were compared by six-fold cross validation by site of C predictions developed by Partial Least Squares (PLS) regression and Boosted Regression Trees (BRT). First derivative spectral data was used along with four preparation methods: (i) field moist and (ii) dry cores, (iii) 2-mm sieved ("Sieved") and (iv) milled samples (<200-um, "Milled") were used to evaluate the potential application to in-situ analysis. The most accurate SOC predictions were from Milled samples using a Local calibration set. SOC predictions were a result of SOM electronic absorptions within the visible region.