abstract in order to study the effect of planting season (autumn and spring) and plant density on growth traits and flower yield (dry weight of flower) of matricaria (matricaria chamomilla), an experiment was carried out at the research field of agricultural faculty of shirvan, affiliated to ferdowsi university of mashhad. a split plot design with two factors, including planting time and plant ...

Power Line Communication (PLC) has been considered as attractive media for high speed data transmission, particularly for applications like home networking, internet, voice and data services. For the use of the low voltage networks as high speed data channel the path carrier frequencies within the range up to 30 MHz must be considered. The development of suitable communication systems and the p...

The capture of patchily distributed nutrients by tree roots has received extensive research, but the fate of those nutrients has not. We performed experiments to determine if nutrient transport within tree species is preferentially transported from specific roots to specific branches. Saplings of five species with contrasting growth requirements were examined: two Betula species (B. papyrifera ...

Our previous work demonstrated that boron (B) supplied to soybeans (Glycine max [L.] Merrill cv ;Williams 82') by a stem infusion technique increased the number of pods on branches and led to a significant yield increase. Therefore, research was continued to determine whether soil or foliar applications of B could be used to achieve the same results. Field experiments were completed with both s...

It is known that decision tree learning can be viewed as a form of boosting. However, existing boosting theorems for decision tree learning allow only binary-branching trees and the generalization to multi-branching trees is not immediate. Practical decision tree algorithms, such as CART and C4.5, implement a trade-off between the number of branches and the improvement in tree quality as measur...

Genetic variability is an indicator for a plant breeder to proceed further. Six F3:4 derived inter-specific Brassica populations along with three checks were evaluated for genetic variability for agronomic characters at NWFP Agricultural University, during 20052006. Highly significant (P < 0.05) genetic variations were recorded for plant height. Maximum number of pods main receme (94) was obser...