Decision support systems (DSS) have been used to a very limited extent in pond aquaculture. This study documents the development of a DSS (POND) which allows representation of an entire pond aquaculture facility, and provides analysis capabilities in the form of simulation models and an economics package. Simulation tools in...
A recent development in drift-control for agricultural ground sprayers is the
installation of a hood (or shroud) over the boom. Hoods are designed to provide
a protected zone in which droplets can be sprayed and deposited on the target with
limited interference from the wind.
This study compared chemical drift...
Soil solution samplers have certain inadequacies that limit their range of
possible applications. Passive Capillary Samplers (PCAPS), which apply suction to the
soil pore-water via a fiber glass wick, have shown promising results in preliminary
experiments in regard to collection efficiency of water and of bromide tracers. The
objectives of...
Several methods of infering plant water stress for
irrigation scheduling are based upon measurements of the
environment in which the plants grow. These measurements
include parameters such as soil water content, air
temperature, pan evaporation and incident radiation. It is
hypothesized that improved estimates of plant water deficit
can be...
With the expansion of the Tillamook Creamery, in Tillamook Oregon, to double or more
its cheese production, the demand for milk presents an economic opportunity for the member
dairies of the Tillamook County Creamery Association. Before area dairies can expand their
herd size to increase milk production for the creamery,...
Treatment efficiency in a constructed wetland is related in part to the amount of
time that a wastewater remains in the system. Current design methods idealize the system
as a plug flow reactor and use a "residence time" based solely on the volume of the cell
and the flow rate....
Methane is the most abundant organic chemical in the
earth's atmosphere. Its abundance in the atmosphere is
increasing with time and has reached levels not seen in recent
geological history. The methane is produced both naturally, and
anthropogenically. One of the sources of anthropogenic methane
is manure from domesticated animals....
Recent advances in computer technology have made possible the development of expert systems. Expert systems are computer programs that perform at the level of a human expert. Expert systems can help integrate and apply diverse sources of information and expertise to problems of integrated crop management. A prototype Crop Management...
A two year experiment demonstrated electrical energy savings
through evaporator fan cycling in part of a full-sized refrigerated
controlled atmosphere apple storage facility in Yakima, Washington.
Room cooling demand and evaporator fan operation was controlled by
the bulk fruit temperature. Refrigerant temperature was regulated
by a computer controlled ramping sequence...