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1. Effects of Lime and Micronutrient Amendments for Acidic Soils of the Inland Pacific NorthwestThe soil pH of agricultural land in the inland Pacific Northwest has dropped precipitously from native soil levels of near 7.0 pH. Changes that were becoming evident in the 1980’s have reached critical levels, leaving tens of thousands of acres of previous prairie soil at pH under 5.0 and unable to grow an increasing number of aluminum-sensitive crops. Some farmers in the region are beginning to use lime application to neutralize soil acidity. However, pH changes and liming can also... R. Wieme, L. Carpenter-boggs, P. Carter, S. Van vleet |
2. Amending Acidic Soils for Sustainable Wheat ProductionSoils in the Inland Pacific Northwest region have been gradually declining in quality as the result of applications of nitrogen fertilizers, regardless of the nitrogen form. Soil test reports evaluated in the 1980’s and 90’s indicated this decline. Recent surveys have provided more extensive data that the pH decline is continuing. Soil test reports indicate that nearly 90% of soils have declined to below 5.2 pH (strong to very strongly acid) in the surface layer of the soil profile.... P. Carter, G. Wegner |
3. Stratified Soil pH Identification ProjectColumbia County Washington is in the foothills of the Blue Mountain Range and the edge of the Palouse wheat country. The soils of the farming region are mostly a rich silt loam having a rainfall ranging from 12 inches to 25 inches north to south respectively with elevations from 1000 to 3200 feet. About 90% of the cropping systems have adopted conservation tillage, direct seeding or no-till, which has been good for the management of soil erosion. In April 2006, intense soil sampling (1 cm increments)... P. Carter, T. Bruegman |
4. Stratified Nutrient and Soil pH Education and Demonstration ProjectColumbia County Washington is in the foothills of the Blue Mountain Range and the edge of the Palouse wheat country. The farming region soils are mostly a rich silt loam having a rainfall ranging from 10 inches in the north at the Snake River to 25 inches next to the Blue Mountains. About 90% of the cropping systems have migrated to some variation of conservation or reduced tillage. This has been good for the management of soil erosion but earlier intense soil sampling indicates that it may have... P. Carter |
5. Demonstration of Veris Nir Soil Carbon Mapping TechnologyThe new VERIS Technologies Near Infra Red (NIR) Spectrophotometer compares soil spectral measurements with soil carbon (C) and other properties. These data can be utilized to generate maps of soil characteristics across the landscape. This potentially useful system may simplify the measurement of important soil properties, provide a new tool for evaluation of residue conservation management practices, and guide farmers in soil management decisions based on data heretofore unavailable. While growers... P. Carter, S. Van vleet, E. Perry, S. Young, F. Pierce |