Walnut agroforestry (1996)

Agroforestry, or growing trees and other crops together on the same land, has been practiced for years in other countries to achieve more sustainable and productive use of limited land resources. In the U.S., forestry and agriculture historically have been considered mutually exclusive land use alternatives. But with clear management objectives, careful planning and skillful intensive management, combining crops and trees can provide advantages that outweigh any perceived disadvantages. Agroforestry is a potential alternative to conventional mechanical methods for soil erosion control. It also allows for gradual removal of highly erodible cropland from row-crop production.New 1/92, Reprinted 5/96/5

19. ON THE EVOLUTION AND PHYLOGEOGRAPHY OF THE SOUTHEASTERN SPECIES OF THE GENUS DALEA (FABACEAE) USING A MOLECULAR PHYLOGENETIC APPROACH.

Dalea (Fabaceae) is a genus of small, herbaceous, perennial dicots that consists of approximately 160 species with a few species being geographically widespread, and most of the genus being endemic to restricted areas with calcareous substrates containing high levels of calcium carbonate. A previous study (McMahon and Hufford, 2004) looked at the phylogeny and genetic makeup of the tribe which Dalea belongs to, Amorpheae, and one other phylogenetic study (Diggs, 2013) has been conducted on the genus itself. This study focuses on the phylogeny and phylogeography of Dalea species from the Gulf Coastal Plain of Florida, including D. carnea, D. carthagenesis var. floridana, D. feayi, D. pinnata var. pinnata,D. pinnata var. trifoliata, D. adenopoda, D. mountjoyae, and D. albida. Phylogeny for Dalea will determined by DNA sequences amplified through Polymerase Chain Reaction (PCR) of the chloroplast trnK/matK intron, and the nuclear ribosomal introns ITS1, 5.8S, and ITS2, and compared to sequences obtained from previous phylogenetic studies of Dalea. Currently, no results have been ascertained, but samples have been collected and the DNA extracted. Key words: Dalea; Amorpheae; Fabaceae; ITS; phylogeny; phylogeography; trnK/matK; Gulf Coastal Plain; calcareous substrate

Economics of agroforestry (1996)

Agroforestry provides a landowner the opportunity to develop a portfolio of short- and long-term investments that allow for some spreading of financial risk through diversification. In general, diversification of investment provides financial advantages, although it also introduces the need for additional management expertise to deal with the added complexity of the farm operation. For farms with land particularly unsuitable for crops, agroforestry provides a way to remove the unsuitable land from crop production over an extended period as the trees mature. Agroforestry also provides social benefits by functioning as a protective system that ensures resource conservation, although some of these benefits are not directly measurable.New 5/96/5M

Inertial parameters and superfluid-to-normal phase transition in superdeformed bands

The quasiclassically exact solution for the second inertial parameter $\cal B$ is found in self-consistent way. It is shown that superdeformation and nonuniform pairing arising from the rotation induced pair density significantly reduce this inertial parameter. The different limiting cases for $\cal B$, which allow to study an interplay between rapid rotation, pairing correlations, and mean field deformation, are considered. The new signature for the transition from pairing to normal phase is suggested in terms of the variation of ${\cal B}/{\cal A}$ versus spin. Experimental data indicate the existence of such transition in the three superdeformed mass regions.Comment: 8 pages, LaTeX, 3 figure

High-z radio starbursts host obscured X-ray AGN

We use Virtual Observatory methods to investigate the association between radio and X-ray emission at high redshifts. Fifty-five of the 92 HDF(N) sources resolved by combining MERLIN+VLA data were detected by Chandra, of which 18 are hard enough and bright enough to be obscured AGN. The high-z population of microJy radio sources is dominated by starbursts an order of magnitude more active and more extended than any found at z<1 and at least a quarter of these simultaneously host highly X-ray-luminous obscured AGN.Comment: 4 pages, 2 figures, To appear in the proceedings of 'At the Edge of the Universe' (9-13 October 2006, Sintra, Portugal