Soil hydraulic principles suggest that post-infiltration hypoxic conditions would be induced in the plant root-zone for drip-irrigated tomato production in small pots filled with natural soil. No previous study specifically examined the response of tomato plants (Solanum lycopersicum) at different growth stages to low soil aeration under these conditions. A 2 × 6 factorial experiment was conduc...

Field plots in Tifton loamy sand were treated with various soil pesticides in 1973 and 1974 and either left exposed or covered with biodegradable flint mulch. Test crops were cantaloup, slicing and pickling cucumber, squash, and sweet corn. Overhead sprinkler irrigation was used in 1973, and trickle irrigation under the film mulch was used on sweet corn in 1974. Soil was assayed for nematodes, ...

Subsurface soil water retention technology is a modern tool to increase the yield and improved saving. The goal of this paper review gathered three selected local experimental woks carried out in different regimes Iraq purposes improving productivity for strategy plants some vegetables crops irrigated by utilizing irrigation systems installing membrane trough. Moreover, retained rainfall was al...

One of the most critical barriers to widespread adoption of electric cars is the lack of charging station infrastructure. Although it is expected that a sufficient number of charging stations will be constructed eventually, due to various practical reasons they may have to be introduced gradually over time. In this paper, we formulate a multi-period optimization model based on a flow-refueling ...

We consider a model of occupational choice in large economies where individuals differ in their wealth endowment. Individuals can remain self-employed or engage in productive matches with another individual, i.e., form firms. Matches are subject to a moral hazard problem with limited liability. The division of the gains from such matches is determined by competitive forces. When the incentive p...

We present Trickle, an algorithm for propagating and maintaining code updates in wireless sensor networks. Trickle uses a “polite gossip” policy, where nodes periodically broadcast a code summary to local neighbors but stay quiet if they have recently heard a summary identical to theirs. When a node hears an older summary than its own, it broadcasts an update. Instead of flooding a network with...