Weather map motion. Two-dimensional streamlines based on wind speeds at various levels show areas of convergence and divergence in the wind field, which are helpful in determining the location of features within the wind pattern. A popular type of surface weather map is the surface weather analysis, which plots isobars to depict areas of high pressure and low pressure. Cloud codes are translated into symbols and plotted on these maps along with other meteorological data that are included in synoptic reports sent by professionally trained observers. The use of weather charts in a modern sense began in the middle portion of the
Range condition scoring of rangeland. The tables differ depending upon average rainfall as well as soil type. These differences occur because the climax plant community would differ as the variables of rainfall and soil type change. The score that is computed will fall in the range of 0-25% if the range is in "Poor" Condition, 26-50% if the range is in "Fair" Condition, 51-75% if the range is in "Good" Condition, and 76-100% if the range is in "Excellent" Condition. By taking the range condition score that is determined, the researcher then can use Table 4 in the Nebraska Cooperative Extension Circular EC