aims: in regard to increasing greenhouse area in iran followed by increased use of pesticides and contaminated crops, this study aimed to determine the frequency and types of consumed pesticides in kashan region, iran, greenhouses. instrument & methods: in this descriptive study in 2011-2012, samples was entered by census method. at the first step, a list of greenhouses was obtained from agricu...

We investigated the success of two stingless bee species in pollinating strawberries in greenhouses. Three greenhouses and one open field area were used; one greenhouse had only strawberry plants (control), another (G1) had three colonies of Scaptotrigona aff. depilis and another (G2) had three colonies of Nannotrigona testaceicornis. In the open field area, the flowers could be visited by any ...

greenhouse structure has an important role in success of greenhouse production. this research was conducted to study problems related to vegetable greenhouse structure in khuzestan province for on year(2011-2012). for this purpose, 21 greenhouses were selected by simple randomized samplang and questionnaires were completed. the results revealed that the major problems in greenhouses vegetable p...

We examined whether the e€ects of elevated CO2 on growth of 1-year old Populus deltoides saplings was a function of the assimilation responses of particular leaf developmental stages. Saplings were grown for 100 days at ambient (approximately 350 ppm) and elevated (ambient + 200 ppm) CO2 in forced-air greenhouses. Biomass, biomass distribution, growth rates, and leaf initiation and expansion ra...

Greenhouse culture plays a significant role in driving the agricultural development process by providing artificial conditions for production and/or neutralizing environmental variables. Obviously, planning for developing this production system requires understanding effective and limiting variables. Accordingly, the present study was conducted in 2018 in order to evaluate management indicators...

High-tech greenhouses and artificial light applications aim to improve food production, in line with one of the sustainable development goals UN Agenda 2030, namely, “zero hunger”. In past, incandescent lamps have been used for supplementary lighting (SL) at higher latitudes increase greenhouse production during dark season. Light-emitting diodes (LED) replacing gas discharge lamps, their is ex...

We introduce CST, an algorithm for constructing skill trees from demonstration trajectories in continuous reinforcement learning domains. CST uses a changepoint detection method to segment each trajectory into a skill chain by detecting a change of appropriate abstraction, or that a segment is too complex to model as a single skill. The skill chains from each trajectory are then merged to form ...