2,835 research outputs found
Tree Fruits for Alaska
This circular has been prepared with three major objectives in mind.
1) to define areas in which tree fruit culture is possible in Alaska and
the types of fruit that can be grown in each, 2) to name and describe
the varieties that at the present time seem more desirable for planting
in Alaska, and 3) to point out the m?-in problems limiting tree fruit culture
and suggest, rather than discuss, the probable means by which they may
one day be solved.
Fulfilling the first two of these objectives was a relatively simple
matter, since it was only a matter of defining and description. But the
third objective was not-and is not-so easy of attainment. In what may
be an oversimplification, it has been stated that there are two main problems,
winter hardiness and earliness of maturity, and methods have been
indicated by which, it is believed, each may be overcome.
However the very problems themselves are not as simple as they
have been made to appear. That of winter hardiness is one of the most
widely debated and investigated subject in plant science. And the characterization
of the second as "earliness of maturity" makes it sound too
simple, for actually the factor involved, as it applies to fruit growing in
Alaska is aiding or hastening natural earliness of maturity. This is a far
more complex matter.
In describing the solutions of these problems, mention has been
made of such factors as pruning and training, fertilization, furnishing
protection to increase available heat, and limiting the water supply to the
trees during the period of fruit maturation. Each of these subjects has
also been the subject of numerous investigations and some of them
have been the subject of textbooks. The discussion of them here has been
limited to simple statements as to their merit in achieving specific
objectives.
Most of the statements made are based on research in Alaska. In
one particular, however, they have knowingly been extended beyond the
domain of research-supported conclusion. This is in advocating the withholding
Qr decreasing water available to the trees during the maturation
of the fruit. Some will disagree with this recommendation, for it runs
counter to what is considered good orchard management in commercial
fruit producing regions of the world. In these an ample water supply
is advocated for this period to increase fruit size and heighten, though
not to increase, coloration. In Alaska both considerations should
be waived in favor of obtaining reasonable yields of fruit, suitable for culinary purposes.In all three regions of Alaska
where tree fruit production is at all
possible, lack of winter hardiness in
the trees and failure of fruit to mature
properly are the two chief
limiting factors
AGRIBUSINESS SIMULATORS FOR MANAGEMENT TRAINING
This paper describes four agribusiness simulators which can be processed on a microcomputer for use in undergraduate and extension teaching. The simulators model the environment in which supermarket chains, farm supply centers, and cooperative and proprietary grain elevators compete for business. Instruction manuals, user's manuals, and a diskette are distributed for each simulator. Each diskette contains programs to enter and edit team decisions, to process decisions and print reports, and to create graphs of team performance. The simulators can be used to teach financial management concepts and techniques, as well as economic principles.Agribusiness,
THE ROLE OF ALTERNATIVE AGRICULTURAL ENTERPRISES IN A CHANGING AGRICULTURAL ECONOMY
Agribusiness,
Variational calculations on the hydrogen molecular ion
We present high-precision non-relativistic variational calculations of bound
vibrational-rotational state energies for the and molecular
ions in each of the lowest electronic states of , , and
symmetry. The calculations are carried out including coupling between
and states but without using the Born-Oppenheimer or any
adiabatic approximation. Convergence studies are presented which indicate that
the resulting energies for low-lying levels are accurate to about .
Our procedure accounts naturally for the lambda-doubling of the state.Comment: 23 pp., RevTeX, epsf.sty, 5 figs. Enhanced data in Table II, dropped
3 figs. from previous versio
Pressure distributions on three different cruciform aft-control surfaces of a wingless missile at Mach 1.60, 2.36, and 3.70. Volume 2: Clipped delta tail
Pressure coefficients were obtained in the Langley Unitary Plan wind tunnel for a wingless missile with a clipped delta tail. The angle of attack was varied from -4 deg to 20 deg, model roll angle was varied from 0 deg to 90 deg in 22.5 deg increments, and tail deflections were 0 deg to - 15 deg. The pressures were measured on two adjacent tail surfaces using 91 pressure orifices per tail surface. Results are presented in plotted and tabular form
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