the establishment and survival of seedlings is one of the main objectives of forest management which ensures continues production. the aim of this article is the investigation of dead trees effect on beech and hornbeam seedlings in masal's forests. for this reason, 30 dead trees were selected, and the control trees were selected in four aspects around the dead trees. they were the same as ...

This paper initially proves mathematically that the solution of the relative orientation of the push broom stereo images leads to a set of ill-posed system of observation equations which means no relative orientation for this kind of imageries is possible. It is then demonstrated that the only way to bypass the inherent rank deficiency in the system of the relative orientation equations, is to ...

The performance of the gutter brooms sweeping system was studied by conducting an experimental test. test is carried out operating a sweeper to sweep plastic, paper, and leaf waste. results show that at broom rotation speed 150,6 rpm, plastic obtained 100% success rate with three settings for height broom, while waste position ± 0 mm touching road surface paper 15 pressing surface. comprehensiv...

ABSTRACT The witches'-broom disease, caused by the basidiomycete Crinipellis perniciosa, is the most limiting factor for cacao cultivation in Brazil. Trichoderma stromaticum is a mycoparasite of the witches'-broom pathogen of cacao that is currently being applied in the field to manage the disease in Bahia State, Brazil. In this work, molecular and traditional methods were used to study the gen...

PAGE 495 1. The physical background of the problem. .................................... 11. Evidence concerning the duality of the X-ray effect on chro 111. A partial separation of the Werent genetic effects of X-rays.. . . . . . . . . . . IV. The production of multiple allelomorphs.. ..... ........................... 507 V. An induced mutation visibly d8erent from a known lass of VI. First at...

Montane regions worldwide have experienced relatively low plant invasion rates, a trend attributed to increased climatic severity, low rates of disturbance, and reduced propagule pressure relative to lowlands. Manipulative experiments at elevations above the invasive range of non-native species can clarify the relative contributions of these mechanisms to montane invasion resistance, yet such e...