Ree Wheatgrass: Its Culture and Use

Ree wheatgrass, Agropyron intermedium and A. trichophorum, is a new pasture and hay grass released by the South Dakota Agricultural Experiment Station. It is closely related botanically to slender wheatgrass, Agropyron trachycaulum, and western wheatgrass, Agropyron smithii, both native to South Dakota and crested wheatgrass, Agropyron cristatum, native to the cold, dry plains of Russia and Siberia

Rancher, A Low Hydrocyanic Acid Forage Sorghum

Rancher sorghum has the lowest hydrocyanic acid content of any named forage sorghum variety in production. It contains about one-third of the hydrocyanic acid content of the low-acid Dakota Amber 39-30-S released in 1937 and only about one-tenth of the hydrocyanic acid content of commercial varieties (Table I). It was developed by the South Dakota Agricultural Experiment Station from a cross of the low hydrocyanic acid strain 39-30-S and a high acid strain 19-30-S and back crossed with the low acid strain 39-30-S. Both strains were selected from Dakota amber variety

Dual, an Early Grain and Forage Sorghum

Dual is a new grain and forage sorghum for South Dakota which grows taller than either Reliance or Norghum. It was developed to provide the stockman with a grain sorghum having a high yield of sweet, juicy forage for both fodder and silage. Tests conducted at several locations on widely different soil types and under varying climatic conditions show Dual is well adapted to the sorghum growing areas of the state. About 8,000 pounds of Dual seed were released by the South Dakota State College Agricultural Experiment Station to the County Crop Improvement Associations in the spring of 1958

Scale-dependency of the global mean surface temperature trend and its implication for the recent hiatus of global warming

Studies of the global mean surface temperature trend are typically conducted at a single (usually annual or decadal) time scale. The used scale does not necessarily correspond to the intrinsic scales of the natural temperature variability. This scale mismatch complicates the separation of externally forced temperature trends from natural temperature fluctuations. The hiatus of global warming since 1999 has been claimed to show that human activities play only a minor role in global warming. Most likely this claim is wrong due to the inadequate consideration of the scale-dependency in the global surface temperature (GST) evolution. Here we show that the variability and trend of the global mean surface temperature anomalies (GSTA) from January 1850 to December 2013, which incorporate both land and sea surface data, is scale-dependent and that the recent hiatus of global warming is mainly related to natural long-term oscillations. These results provide a possible explanation of the recent hiatus of global warming and suggest that the hiatus is only temporary

Correlations Between Length of Spike and Culm in Wheat and Certain Characters of Progeny, including Yield

Measurements of the central culm and head of 256 plants of Marquis wheat were made in 1919 , which were called mother heads and mother culms\u27 \u27 respectively. Each head was threshed separately and an equal number of kernels from each, sown in nursery rows with the seed from long heads alternating with that from short heads. The same order of planting was followed during the length of the experiment. Each row was threshed separately and seed saved for the following year

The Date of Seeding Winter Rye when the Ground is Dry or Wet

The position of winter rye as a well-established crop in South.Dakota is indicated by the fact that substantial acreages are sown each year. Such position for winter rye results from the fact that it is a comparatively sure crop, capable of producing fair yields when seeded over wide range of time and conditions. Yields from seeding at different dates at the experiment substation at Highmore indicate that under usual circumstances maximum yields can be secured from seeding at the optimum date, September 15. In seasons when rainfall is abnormally high or abnormally low the the safest method of handling seed of winter rye would be to delay seeding for some weeks after the optimum date until conditions are favorable. This delay in seeding winter rye in order to avoid possible loss of valuable seed is warranted on the basis of fairly good yields secured from later seeding

Predictability and Non-Gaussian Characteristics of the North Atlantic Oscillation

AbstractThe North Atlantic Oscillation (NAO) is the dominant mode of climate variability over the North Atlantic basin and has a significant impact on seasonal climate and surface weather conditions. It is the result of complex and nonlinear interactions between many spatiotemporal scales. Here, the authors study the statistical properties of two time series of the daily NAO index. Previous NAO modeling attempts only considered Gaussian noise, which can be inconsistent with the system complexity. Here, it is found that an autoregressive model with non-Gaussian noise provides a better fit to the time series. This result holds also when considering time series for the four seasons separately. The usefulness of the proposed model is evaluated by means of an investigation of its forecast skill