within-field variation of wheat yield and spatial pattern of weed density and soil nitrogen were evaluated by geostatistical methods. samples were taken from a 90×120 m area located in a 3.8 ha wheat field. soil nitrogen content and weed density at tillering and wheat yield at maturity were measured in 1 m2 plots located at the center of 10×10 m grids. grain yield was varied between 1.5-4.9 t h...

1. The nonpsychoactive cannabinoid abnormal-cannabidiol (trans-4-[3-methyl-6-(1-methylethenyl)-2-cyclohexen-1-yl]-5-pentyl-1,3-benzenediol) (abn-cbd) produced concentration-dependent relaxation of methoxamine-precontracted rat small mesenteric artery. Endothelial removal reduced abn-cbd potency six-fold without affecting the maximum relaxation. 2. In endothelium-intact vessels, abn-cbd was less...

The vertical distribution and abundance of conspicuous gastropod and bivalve species were studied at five rocky beaches in Cuastecomate Bay, Jalisco. Sampling was done from September, 1993 through March, 1994 with 0.75 m2 quadrants placed along replicate transect lines (10 m long) in the supralittoral and mesolittoral (upper, middle and lower intertidal) zones. A total of 6,643 mollusks were co...

The diversity of amphipods in the continental shelf sediments of the southeast coast of India is dealt in the paper. Samples for the study were collected onboard FORV Sagar Sampada during Cruise Nos. 260, 275 and 290 conducted in December 2008, May 2010 and October 2011 respectively. Samples were collected at various depths (30 m, 50 m, 75 m, 100 m, 150 m and 200 m) along 6 transects namely Sin...

silvicultural operation need to notice the species diversity. to this study gomarlang district in marivan region, northern zagros forest was selected. in this study 30 circle sample plots (500 m2) were collected by random method. in every sample plot the kind of species and number of trees and shrub were recorded. in the sample plots the micro plots of 5 m by 5 m (i.e. area of 25 m2) were desig...

We show that the space of negatively curved metrics of a closed negatively curved Riemannian n-manifold, n ≥ 10, is highly non-connected. Section 0. Introduction. Let M be a closed smooth manifold. We denote by MET (M) the space of all smooth Riemannian metrics on M and we consider MET (M) with the smooth topology. Note that the space MET (M) is contractible. A subspace of metrics whose section...

Scheme 2: Σ(M) = (σ(1 ◦m1), σ(2 ◦m2), . . . , σ(n ◦mn)), where each index i is represented using dlog2(n+ 1)e bits. 3. Choose the smallest n such that d2 log2(n+ 1) + |M | n e ≤ k. (Assume that |M | is small enough and k is large enough to make this is possible.) Then break M up into M = m1 ◦ . . . ◦mn, where each mi is such that |mi| = k − d2log2(n+ 1)e, and mn is padded with 0s as necessary. ...

A natural question, of great generality, various special forms of which are often asked in differential topology, is the following: Let Mi, Mi be differentiable w-manifolds, : M\—»M2 a continuous map which is a homotopy equivalence between M\ and M2. When is there a differentiable isomorphism <3>: Mi—> M2 in the same homotopy class as 0? For example, there is the Poincaré Conjecture which po...