abstract soilless culture of greenhouse vegetables has been a fast developing section in iran during recent years. most growers use hydroponics systems with artificial substrates. some of the used substrates have low water retention which results in wasting a great deal of solution. on the other hand, low vigor of cucumber root in water and fertilizer absorption, especially in low media tempera...

The Nematodes are roundworms that are found in every environment of the earth. While some species are harmful parasites, others play a vital role in nutrient cycle and medical research. Nematode infestation in the fields is poly-specific; however, depending on the agro-climatic conditions, one or two species are dominant over the rest. The present studies attempts to observe and control the roo...

Improving the efficiency of resource utilization has received increasing research attention in recent years. In this study, we explored the potential physiological mechanisms underlying improved grain yield and water-use efficiency of winter wheat (Triticum aestivum L.) following organic fertilizer application. Two wheat cultivars, ChangHan58 (CH58) and XiNong9871 (XN9871), were grown under the...

Abstract Soils naturally low in organic matter need to be amended with recycled materials that would boost soil health. In this work, we tested insect frass, the excrements of yellow mealworm, Tenebrio molitor , as a novel amendment spinach cultivation. 60-day pot experiment ( Spinacia oleracea ), added frass at rates 0, 0.25, 0.5, and 1%, well an inorganic nitrogen-phosphorus-potassium (NPK) f...

This essay establishes three factors, i.e. organic fertilizer, chemical fertilizer and with cow carbide. The purpose of the present study was to elucidate influence on yield inner quality in spinach fifteen treatments at five levels. results showed that contents reducing sugar nitrate nitrogen handling area less than those fertilizer. No significant difference found among fresh weight, total co...

To raise the eco-efficiency of the economy, it is important to not only investigate the eco-efficiency of specific products but also to ascertain whether the resources are used effectively throughout the life cycle. In this paper, we address eco-efficiency of agricultural use of phosphorus in Japan in the years 2005, 2010, and 2011. The increase in revenue from crops due to the use of phosphoru...

Fertilizer efficiency directly affects the production of continuous cropping greenhouse cucumber. So analyzing the fertilizer efficiency is of great significance in providing decision-making support for fertilization of greenhouse cucumber. By establishing the DEA models of continuous cropping greenhouse cucumber and taking existing data samples as study objects, the problems of fertilizer effi...