We prove a general lemma on the existence of (1/r)-cuttings of geometric objects in Ed that satisfy certain properties. We use this lemma to construct (1/r)-cuttings of small size for arrangements of line segments in the plane and arrangements of triangles in 3-space; for line segments in the plane we obtain a cutting of size O(r+Ar2/n2), and for triangles in 3-space our cutting has size O(r2+ε...

The loss caused by the so-called minor diseases is not usually considered of sufficient importance to warrant the adoption of control measures such as those used in combating major diseases; nevertheless it has frequently been asserted that if the total loss due to the activities of all minor diseases could be estimated it would probably amount to more than is imagined. Further, a disease which...

Abstract: The objective of this work was to evaluate the influence pruning management mini-stumps Climax blueberry cultivar, when weekly fertigated, on productivity clonal mini-garden and rooting root vigor mini-cuttings. high survival (100%) production mini-cuttings (182.9 per square meter month) evidence adaptability material successive samplings nutritional conditions provided mini-garden, r...

common yew (taxus baccata) is one of the native and extinguishing speices at northern forests of iran that is very important as a genetic reserve and, therefore, more studies are necessary for preservation and restoration of this rare forest speices. for having high value and complete preservation of gene structure, vegetative propagation is one of the suitable in use methods in this field. thi...

ethylene as a plant hormone plays various functions in a variety of physiological phenomena including seed germination, root initiation on stem cutting, senescence and organs abscission. in our previous investigation, five rose genotypes were identified showing high-sensitivity or low-sensitivity to exogenous ethylene treatment. the purpose of this study was to evaluate the rooting capacity and...

Growth, gas exchange, root hydraulic conductivity, and drought response of seedling and rooted cuttings of Lovell and Nemaguard peach [Prunus persica (L.) Batsch], and Carrizo (Poncirus trifoliata x Citrus sinensis) and sour orange (C. aurantium L.) citrus rootstocks were compared to determine the influence of propagation method on these characteristics. Rooted peach cuttings had a higher propo...

studies have shown that rooting substrate is one of the effective factors at rooting of hard rhizogenetic plant such as henna. the purpose of this study is to determine an appropriate concentration of naphthalene acetic acid (naa), indole butyric acid (iba) and salicylic acid (sa) on rooting of henna. present study showed that there was a great variation in most of the measured characters at p<...