in order to determine the effects of zinc foliar application on the vegetative characteristics, yield and fruit quality in strawberry (fragaria × ananassa duch) cv kordestan under salinity stress conditions, an experiment was carried out hydroponically in glasshouse as a controlled environment during 2009 through 2010. three levels of nacl (0, 15, 30 mm) and three levels of zn (0, 1.5, 3 g/l) w...

ABSTRACT- The effects of iron (Fe) and zinc (Zn) treatments on the growth and nutrient composition of chickpea were studied in a greenhouse experiment arranged in a completely randomized design. While the application of Fe decreased mean shoot dry weight of chickpea, that of Zn had no significant effect on chickpea shoot dry weight. Increasing Fe levels drastically decreased Mn concentration an...

Practices to promote tree root growth have been sought in arboriculture for many years, especially as a treatment for trees that are stressed or in decline. Tree fertilization is a common practice in arboriculture. A few research reports have shown that nitrogen fertilization can increase fine-root density in localized areas of soil where the fertilizer has been applied, but the effect on the w...

It has been shown that the problem of finding a broadcast routing tree with minimum total transmit power is NPhard. Hence, developing a heuristic power-efficient algorithm is crucial. The seminal work in this area is the well-known Broadcast Incremental Power (BIP) algorithm with a recent addition called Embedded Wireless Multicast Advantage (EWMA) algorithm. In this paper, we present yet anoth...

Reliable broadcast is an important primitive in wireless mesh networks (WMNs) for applications such as software upgrade, video downloading, etc. However, due to the lossy nature of wireless link, it is not trivial to achieve the reliability and efficiency at the same time. In this paper, we put forward R-Code, a reliable and efficient broadcast protocol based on intra-flow network coding. The k...

In wireless mesh networks, each node can be equipped with multiple network interface cards tuned to different channels. In this paper, we study the problem of collision-free multicast in multi-interface multi-channel wireless mesh networks. The concept of interface redundancy is proposed as a new criterion for the multicast/broadcast redundancy in wireless mesh networks, and we prove that build...

This paper presents a locality-based dissemination graph algorithm for scalable reliable broadcast. Our algorithm scales in terms of both network and memory usage. Processes only have “local knowledge” about each other. They organize themselves dynamically (right from the bootstrapping phase), according to join, leave or crash events, to form a locality-based dissemination graph. Broadcast mess...

We consider broadcast protocols in wireless networks that have limited energy and computation resources. The well-known algorithm, DBIP (Directional Broadcast Incremental Power), which exploits “Incremental Power” philosophy for wireless networks with directional antenna to construct broadcasting tree, provides very good results in terms of energy savings. Unfortunately, its computation is cent...