It can be used to calculate damage treshhold densities. Various options are available to manipulate the data and to display the results graphically.
Help is included in the program.
SeinFit.hqx is a binhexed self-extracting archive containing the SeinFit program for Macintosh, an example data file and a readme file. The SeinFit program is a 'Fat Binary', thus containing 680x0 and PowerPC native code for optimum performance on both Macs and PowerMacs. Yercurve was initially programmed for estimating the optimum fertilizer rates corresponding with the highest economic yields. The Seinhorst equation was added afterwards. The Seinhorst formula describes the relation between plant growth and nematode population densities, and can be used to calculate damage treshhold densities.