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1. Long-term Crop Rotation Diversity Effects on Soil C and NThe objective of this study was to evaluate the effects of nitrogen (N) fertilizer level and crop rotation diversity on soil organic carbon (SOC) and N stocks from a 34-yr study located in eastern Nebraska. Seven crop rotations (three continuous cropping systems; two 2-yr crop rotations, and two 4-yr crop rotations) and three N levels were compared. Soil samples were taken to a depth of 60-inches. Differences in SOC stocks were largely confined to the 0 to 3-inch depth with greater SOC (P =... M. Schmer, V. Jin, B. Wienhold, G. Varvel |
2. Nitrogen Response of 2-Row Barley in North DakotaIn about 2019, the major malting barley buyers moved from 6-row barley cultivars to 2-row barley cultivars. The N response of 6-row barley was well-established, however, little local data regarding 2-row cultivar N response was available. A 2-year study was conducted in North Dakota on two sites, using two cultivars at each site. Rates of N from 0 to 160 pounds N per acre were imposed on each cultivar. One site was in a long-term (30+ years) no-till system, while the other site was in a transitional... A. Wick, D. Franzen, B. Goettl |
3. Effect of Extractant pH on Exchangeable Cation Determination Using Ammonium Acetate and Mehlich-3Neutral pH ammonium acetate (1N NH4OAC, pH 7.0) is a standard soil test extractant for exchangeable cation concentrations. However, the concentrations may be artificially inflated for alkaline soils, especially those that are highly calcareous. The same effect potentially occurs with the Mehlich-3 extractant (Meh3, pH 2.5). The objective of this study was to determine the effect of pH on exchangeable base cation soil test concentrations. Soil samples from the High Plains region were randomly... F. Vocasek, B. Hopkins |
4. Experience with Using the Sikora-2 Soil/buffer pH Method in the Great PlainsThe acreage of acidic soils in the Great Plains continues to increase from long-term cropping and fertilizer nitrogen use. Acidic soils developed initially in dryland fields and/or in areas dominated by sandy soils, but are now relatively common in irrigated systems and finer-textured soils. A typical method used in the Great Plains states had been to determine soil pH in a 1:1 soil:water slurry and, when required, to determine exchangeable acidity using the SMP buffer solution. The buffer pH... F. Vocasek, S. Harrold |
5. Recent 2-Row Malting Barley Nitrogen Rate Revision for North DakotaAs the demand of two-row malting barley (Hordeum vulgare L.) increases, having sound nitrogen (N) recommendations is increasingly necessary. Not only does N play a role in grain yield, but it may also significantly impact grain malting characteristics including protein, plump, and test weight. To determine the impacts N rate and N availability have on two-row malting barley, two experimental sites were established in both Spring 2020 and 2021. The experiments were organized as a randomized... D. Franzen, B. Goettl |