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Haddad M.,Al - Balqa Applied University | Bani-Hani N.M.,National Center for Agriculture Research and Extension | Al-Tabbal J.A.,Al - Balqa Applied University | Al-Fraihat A.H.,University College of Applied Sciences
Journal of Food, Agriculture and Environment | Year: 2016

Field experiments were conducted to assess the effect of rates of potassium nitrate fertilizer on potato yield and quality in Jordan valley, Jordan, during season 2012–2013. Potato was grown under drip irrigation methods and four potassium nitrate fertilizer doses were applied at 0, 130, 260 and 380 kg ha-1. A significant increase in fresh tuber yield per plant, tuber weight, and tuber yield ha-1with potassium nitrate application at all rate of potassium nitrate was recorded and the highest tuber yield was registered for 380 kg ha-1. Potassium nitrate treatments not only increased the yield and yield components (except tuber number per plant) but also affected the quality parameter of potato tubers (specific gravity, ash, ascorbic acid, protein, carbohydrate and fat), positively. Water use efficiency increased from 3.43 to 4.33 kg m-3using the above mentioned rate of potassium nitrate fertilizer. © 2016, World Food Ltd. and WFL Publishers. All Rights Reserved. Source

Adjlane N.,University of Boumerdes | Doumandji S.-E.,Algeria National School of Agronomy | Haddad N.,National Center for Agriculture Research and Extension
Cahiers Agricultures | Year: 2012

Honeybees, in addition to their production of honey, pollinate the flowers of fruit trees and other crops. Any threat to them, whether from pesticides, herbicides or diseases, therefore pose serious consequences not only for beekeeping, but also for agriculture in general. For several years, many beekeepers in Algeria have reported deaths in their apiaries. At present, we lack hard data on the causes of such mortality. In order to provide some answers to this problem, we conducted a field study with beekeepers in mid-northern Algeria. This study is complemented by information from the beekeeping cooperative, the technical institute of livestock and veterinary services department at the Ministry of Agriculture, and the regional laboratories of veterinary medicine. Analysis of the results shows bee diseases mainly represented by the Varroa and bee poisoning by insecticides, as well as ecosystem degradation (loss of honey flora) and climate change. All these factors threaten the local bee and have a negative influence on the production of honey. Source

Adjlane N.,University of Boumerdes | Chahbar N.,University of Boumerdes | Maidi A.,University of Boumerdes | Haddad N.,National Center for Agriculture Research and Extension
Journal of Materials and Environmental Science | Year: 2013

Oxalic acid is considered as widely used method for treatment against varroa destructor mite,this mite causes a considerabledisorder to honeybees comparing with other bee diseases. Where as the usage of Oxalic acid may causes a weakening of bee coloniesas a side effect. This study aims to determine the effects of oxalic acid on thebiochemical aspect of the honeybee Apis mellifera,bystudying the variations in the content of differentmetabolites of the body and hemolymph (proteins, lipids and carbohydrates). Treatment with oxalic acid disrupts the metabolism of the bee, the results show that it causes a drop in carbohydrate and fat and increased protein levels in the body and the hemolymph. These findings may explain cases of weakness reported by beekeepers afterapplication of this treatment. Source

Qaryouti M.,National Center for Agriculture Research and Extension | Bani-Hani N.,Soil and Irrigation Researcher NCARE | Abu-Sharar T.M.,University of Jordan | Shnikat I.,Horticulture Researcher NCARE | And 2 more authors.
Scientia Horticulturae | Year: 2015

Raw waste water (RWW) from food industry is rich of organic matter and mineral nutrients, particularly, K and to lesser extents N then P. Such richness is attributed to the nature of some substrates involved in the food processing e.g. molace of sugar beet or sugar cane. These two crops are known to require high amount of K and, thus, to further enrichment of their derivatives with that nutrient. As cost of K fertilizers is relatively high, this experiment was conducted to study the effect of applying RWW on soil fertility, yield quantity and quality of greenhouse cucumber and tomato. Uniform 30-day old cucumber seedlings and 45-day old tomato seedlings were transplanted to two multi-span greenhouses (1000m2) on December 12, 2012, at Dair Alla Research Station in Central Jordan Valley (JV). The transplanted seedlings were subjected to 5 RWW treatments of 75% of the traditional amount of K fertilizer farmers of the JV apply during the growing season, 100% of K of the traditional amount of K-fertilizer of which 25% were applied before transplanting and 75% were applied during the growing season, 125% of the traditional amount of K-fertilizer where 25% were added to the soil before transplanting and 100% were added during the growing season, traditional amounts of N, P and K chemical fertilizers, and traditional amounts of N and P chemical fertilizers only. The results showed that RWW can effectively substitute K-chemical fertilizer and can also improve some soil fertility parameters by the end of the growing season. For example, increases in available K and organic matter in the RWW treated cucumber beds were 25-71% and 2-11%, respectively. Similar increases were reported in the case of tomato beds (7-62% and 7-17%). Such increases corresponded to increases in K uptake by cucumber and tomato plants (30 and 37%, respectively). Calcium uptake was also increased to levels as high as 40 and 34% in both crop cases. Results of this study indicated that the application of Raw Waste Water from Food Industry improve cucumber and tomato performance and soil fertility. © 2015 Elsevier B.V. Source

Adjlane N.,University of Boumerdes | Haddad N.,National Center for Agriculture Research and Extension | Kechih S.,Laboratoire Of Microbiologie
Journal of Animal and Veterinary Advances | Year: 2014

American foulbrood is a bacterial disease caused by the Gram-positive bacterium Paenibacillus larvae and is the most dangerous disease of the honeybee. The objective of this study is to compare the methods of detection of this bacterium in different products and samples from the hive. The samples of honey bees, wax, pollen and debris were taken from the hive during Spring period of 2013. Different microbiological methods were used for detection of the bacteria. MYPGP the culture medium is used during all the identifications of the bacterium. The results show that the diagnosis of the disease is more effective in samples of honey and bees than the detection of the bacteria in the wax, pollen and debris from the hive. Even in the absence of symptoms of the disease, the bacteria can be detected in honey or bees. © Medwell Journal, 2014. Source

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