Agricultural Contracting Update: Contracts in 2008

Marketing and production contracts covered 39 percent of the value of U.S. agricultural production in 2008, up from 36 percent in 2001, and a substantial increase over 28 percent in 1991 and 11 percent in 1969. However, aggregate contract use has stabilized in recent years and no longer suggests a strong trend. Contracts between farmers and their buyers are reached prior to harvest (or before the completion stage for livestock)and govern the terms under which products are transferred from the farm. Contracts are far more likely to be used on large farms than on small farms, and they form one element in a package of risk management tools available to farmers. Production contracts are used widely in livestock production, while marketing contracts are important to the production of many crops.Production contracts, marketing contracts, farm structure, farm size, farm income, contracting, Agricultural Resource Management Survey, ARMS, risk analysis, Agribusiness, Farm Management, Livestock Production/Industries, Risk and Uncertainty,

Agricultural Contracting Update: Contracts in 2003

Marketing and production contracts covered 39 percent of the value of U.S. agricultural production in 2003, up from 36 percent in 2001 and a substantial increase over estimated values of 28 percent for 1991 and 11 percent in 1969. Large farms are far more likely to contract than small farms; in fact, contracts cover over half of the value of production from farms with at least $1 million in sales. Although use of both production and marketing contracts has grown over time, growth is more rapid for production contracts, which are largely used for livestock.contracts, contracting, marketing contracts, production contracts, vertical integration, vertical coordination, market structure, risk analysis, price signals, Industrial Organization, Marketing,

Mass Shootings and Mental Illness Perception

This study focused on the relationship between mass shootings and mental illness stigma. Specifically, this study looks at how learning about mass shootings affects the extent to which people with mental illness are stigmatized. Participants were asked to read a short story and then answer survey questions about their opinions of the mentally ill. The main finding of this study was that participant’s preferred greater social distance from people with mental illness after learning about mass shootings, even when it was not explicitly mentioned that the shooter was a person with mental illness

Small Farms in the United States: Persistence Under Pressure

Ninety-one percent of U.S. farms are classified as small—gross cash farm income (GCFI) of less than $250,000. About 60 percent of these small farms are very small, generating GCFI of less than$10,000. These very small noncommercial farms, in some respects, exist independently of the farm economy because their operators rely heavily on off-farm income. The remaining small farms—small commercial farms—account for most small-farm production. Overall farm production, however, continues to shift to larger operations, while the number of small commercial farms and their share of sales maintain a long-term decline. The shift to larger farms will continue to be gradual, because some small commercial farms are profitable and others are willing to accept losses.Family farms, farm businesses, farm financial performance, farm-operator household income, farm operators, farm structure, noncommercial farms, small farms, small commercial farms, Agricultural and Food Policy, Farm Management,

Measurements of the effect of horizontal variability of atmospheric backscatter on dial measurements

The horizontal variability of atmospheric backscatter may have a substantial effect on how Differential Absorption Lidar (DIAL) data must be taken and analyzed. To minimize errors, lidar pulse pairs are taken with time separations which are short compared to the time scales associated with variations in atmospheric backscatter. To assess the atmospheric variability for time scales which are long compared to the lidar pulse repetition rate, the variance of the lidar return signal in a given channel can be computed. The variances of the on-line, off-line, and ration of the on-line to off-line signals at given altitudes obtained with the dual solid-state Alexandrite laser system were calculated. These evaluations were made for both down-looking aircraft and up-looking ground-based lidar data. Data were taken with 200 microsecond separation between on-line and off-line laser pulses, 30 m altitude resolution, 5 Hz repetition rate, and the signal were normalized for outgoing laser energy

Real-time atmospheric absorption spectra for in-flight tuning of an airborne dial system

Real-time measurements of atmospheric absorption spectra are displayed and used to precisely calibrate and fix the frequency of an Alexandrite laser to specific oxygen absorption features for airborne Differential Absorption Lidar (DIAL) measurements of atmospheric pressure and temperature. The DIAL system used contains two narrowband tunable Alexandrite lasers: one is electronically scanned to tune to oxygen absorption features for on-line signals while the second is used to obtain off-line (nonabsorbed) atmospheric return signals. The lidar operator may select the number of shots to be averaged, the altitude, and altitude interval over which the signals are averaged using single key stroke commands. The operator also determines exactly which oxygen absorption lines are scanned by comparing the line spacings and relative strengths with known line parameters, thus calibrating the laser wavelength readout. The system was used successfully to measure the atmospheric pressure profile on the first flights of this lidar, November 20, and December 9, 1985, aboard the NASA Wallops Electra aircraft

Airborne Lidar measurements of the atmospheric pressure profile with tunable Alexandrite lasers

The first remote measurements of the atmospheric pressure profile made from an airborne platform are described. The measurements utilize a differential absorption lidar and tunable solid state Alexandrite lasers. The pressure measurement technique uses a high resolution oxygen A band where the absorption is highly pressure sensitive due to collision broadening. Absorption troughs and regions of minimum absorption were used between pairs of stongly absorption lines for these measurements. The trough technique allows the measurement to be greatly desensitized to the effects of laser frequency instabilities. The lidar system was set up to measure pressure with the on-line laser tuned to the absorption trough at 13147.3/cm and with the reference laser tuned to a nonabsorbing frequency near 13170.0/cm. The lidar signal returns were sampled with a 200 range gate (30 vertical resoltion) and averaged over 100 shots

U.S. Small Farms: Decline and Persistence?

We use two comprehensive and representative USDA databases to assess the performance of small farms in the U.S. Farm production is shifting to much larger farms, and the number of small commercial farms is declining. Most large U.S. farms remain family-owned and operated enterprises, and most remain small businesses by U.S. standards. Small commercial farms tend to focus on three commodities: beef cattle, grains and oilseeds, and poultry. On average, large farm financial returns substantially exceed those on small farms, but the range of performance among small farms is quite wide. About one quarter of the nearly 800,000 small commercial farms show very good financial returns.small farms, structural change, farm income, Agricultural and Food Policy, Q12,

Is methanogenesis related solely to methanogenic archaea?

https://doi.org/10.15157/publication-0