We apply polarities, axiallities and the notion of entropy to the task of identifying marketable items and the customers that should be approached in a marketing campaign. An algorithm that computes the criteria for identifying marketable items and the corresponding experimental work is also included.

Evidence for pollinator declines has led to concern that inadequate pollination services may limit crop yields. The global trade in commercial bumble bee (Bombus spp.) colonies provides pollination services for both glasshouse and open-field crops. For example, in the United Kingdom, commercial colonies of nonnative subspecies of the bumble bee Bombus terrestris L. imported from mainland Europe...

Sweet orange (Citrus sinensis L.) is an important fruit produced and consumed worldwide it’s excellent source of vitamin C. However, citrus industry in Ethiopia at infant stage; which particularly due to shortage improved adapted cultivars their distribution. Considering these, six sweet were evaluated select adapted, high yielding quality cultivar/s. Different growth, phenological, yield compo...

Onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), is a highly destructive pest of onion, Allium cepa L., and its management relies on multiple applications of foliar insecticides. Development of insecticide resistance is common in T. tabaci populations, and new strategies are needed to relax existing levels of insecticide use, but still provide protection against T. tabaci without...

Due to an increasing demand of leaf vegetables, and hence their economic importance in the tropics, it is very common that excessive fertilizer N rates are applied to vegetable gardens and fields to attain high yield. This calls for more information on their nutrient requirements. In this study, we designed experiments to explore the effect of organic N levels on the yield and agronomic N use e...

Amaranths ( Amaranthus sp.) are a popular leafy vegetable grown and consumed by resource-poor people in many African countries. Greater awareness of the importance nutritious foods has increased demand consumers for amaranth. Presently, most farmers grow low-yielding local varieties variable seed quality. High-yielding amaranth that adapted to major agro-ecologies eastern southern Africa posses...