Land degradation and the associated soil acidity are critical challenge for crop production in Ethiopian highlands. Since liming is expensive, farmers have developed an alternative agroforestry system by integrating Acacia decurrens into their landscapes. The expansion rate of this was assessed over last three decades. effects charcoal-making kiln sites on properties were investigated five year...

abstract the increasing of yield per unit area is usually achievable by improving the soil fertility level through using (chemical) fertilizers. the purpose of the present research was to evaluate the 6 extraction methods including olsen, morgan, ammonium bicarbonate-dtpa, colwel, bray and mehlich 3 in order to specify a suitable extractant(s) for estimating available phosphorus through using 2...

Long-term application of poultry (Gallus gallus domesticus) litter has built high levels of P in certain Coastal Plain soils of north Louisiana. However, soil P/runoff P relationships for soil and environmental conditions of the area have not been examined. This study measured soil P (total, Bray 1, Bray 2, Mehlich 3, resin-exchangeable, and water-extractable) and runoff P (dissolved P, DP; and...

The previous papers of this series (Bray, Thorpe & White, 1951, 1952e; Bray, Humphris, Thorpe, White & Wood, 1952b, c, d) reported a study of the kinetics in vivo of some reactions involving benzoic acid and some of its precursors, certain precursors of phenols and a series of substituted phenols. A mathematical model was worked out which could account for the effect upon metabolic fate of dose...

1 experience of imagined as well as real rewards 2 3 Signe Bray, Shinsuke Shimojo and John P O’Doherty 4 5 1. Computation and Neural Systems, Caltech 6 2. Biology Division, Caltech 7 3. Humanities and Social Sciences, Caltech 8 4. Center for Interdisciplinary Brain Science Research, Stanford University 9 5. Institute of Neuroscience, Trinity College Dublin 10 6. School of Psychology, Trinity Co...

We study the consequences of supersymmetry breaking in the computation of the number of solutions of the Thouless-Anderson-Palmer (TAP) equations. We show that Kurchan argument that proves the vanishing of the prefactor of the Bray and Moore saddle point for the total number of solutions can be extended to solutions at any given free energy. We also provide a new simple argument for the vanishi...

In their landmark paper [1], Bray and Savin note that the constant parameters model used by their agents to form expectations is misspecified and that, using standard econometric techniques, agents may be able to determine the time-varying nature of the model’s parameters. Here, we consider the same type of model as employed by Bray and Savin except that our agents form expectations using a per...

We have already reported (Bray, Ryman & Thorpe, 1947) upon the fate ofp-hydroxybenzoic acid and its amide in the rabbit. The present paper gives the corresponding results for the oand m-isomers. The changes which these compounds might undergo are theoretically the same as those for the p-isomer, i.e. the hydroxyl group may be conjugated with either glucuronic or sulphuric acids and the carboxyl...

New and published reports of zoogonid digeneans from New Caledonian waters are recorded, including a description of Overstreetia cribbi n. sp. from Atherinomorus lacunosus. This species differs from its congeners in the detail of its circum-oral spination and some metrical features. Other new records are of: Diphterostomum plectorhynchi Machida, Kamegai & Kuramochi, 2006 in Diagramma pictum; Pa...

It has now been established that both the simple and heterocyclic sulphonamides may undergo both acetylation and oxidation in the body (cf. Williams, 1945, 1946, 1947; Dobson & Williams, 1946; Stubbs & Williams, 1947; Bray, Neale & Thorpe, 1946; Gilligan, 1945; Scudi & Silber, 1944; Weber, Lalich& Major, 1943). In the simpler sulphonamides, such as the o-, mand p-aminobenzenesulphonamides, oxid...