Nutrient management problems provide opportunities for precision application of nutrients, lime and manure. Advantages are provided by precision application, as much for the electronic data logging and record keeping of application rates and environmental conditions, as for the direct economics of reducing the amount of agricultural chemicals applied. Reduction of legal risks through better record keeping of agricultural chemical applications may far outweigh the direct reduction of chemicals and the attendant cost savings. A Brief Synopsis of Precision Agriculture and Related Activities at Pennsylvania State University 1. The populations of two of these three are primarily immigrants from the south.
Data are uploaded via the web into a small, spatially referenced database.
If we can make this work, then we will have a better sense of when the major immigration front occurs into the northeastern US, since the data come from a band stretching from the Chesapeake to Lake Erie. The dynamics of spatial patterns of Colorado potato beetle in potatoes show that immigrating adults establish trends that are predictable from the position of the field relative to last year's fields, and that these trends influence spatial patterns of all later life stages. We set out to model overwintering adult immigration. The temporal pattern of immigration was easily modeled as an exponential sigmoid function of the days after planting. Further modeling will be needed.