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Articles by Raj Kumar
Total Records ( 4 ) for Raj Kumar
  Raj Kumar , S. Jain , M.K. Garg and A.K. Dixit
  Sorption isotherms of rapeseed (Toria) var. viz. TL-15, TH-68 and Sangam were evaluated at 30, 50 and 70°C using the standard static salt solutions method. Sigmoid trends were observed for isotherms sowing a clear effect of temperature. Four mathematical models, i.e., modified Henderson; modified Chung-Pfost; modified Halsey and modified Oswin were fitted for their ability to best fit experimental data on the basis of coefficient of determination. The equilibrium moisture content curves were obtained, both experimentally and by fitting the selected models to the experimental data. Modified Henderson model was found to give the best fit (R2 = 0.99) for describing the experimental data.
  S. Sivasakth , Manoj Khanna , Man Singh , S.S. Parihar , D.K. Singh , Raj Kumar and R.N. Sahoo
  Nitrogen (N) is an essential plant nutrient which is taken up by the crops throughout the growing season. Field experiments were conducted on microirrigation fertigation in garlic crop during the crop growing season of 2008-09 and 2009-10 year (both drip and micro sprinklers). Four levels of nitrogen treatments namely 0, 40, 80 and 120 kg N ha-1 with three replications were applied in both the methods of irrigation in Randomized Block Design (RBD). Water requirement of garlic crop was estimated by using Penman-Monteith method. Periodic soil samples were collected along the lateral (at emitter, 12.5 and 25 cm from emitter ) as well as across the lateral (15 and 30 cm from the emitter) at three soil depths (0-15, 15-30 and 30-45 cm) in both methods of irrigation. The plant samples were also collected during the harvest in both the season. It was observed that the soil water content was relatively higher in upper profile and near the emitter in all the three observations at 24, 48 and 72 h after fertigation in both drip and microsprinkler irrigation. The results revealed that N concentration in active root zone (15-30 cm) in microirrigation was more than the initial N content. In the same layer adequate nitrogen availability was observed. Available nitrogen decreased from emitter to the boundary wetting zone in drip fertigation in contrary to microsprinkler fertigation. Nitrogen leaching was higher in drip fertigation than the microsprinkler due to more vertical movement of soil water leading to the movement of the nitrogen beyond the root zone. Nitrogen balance for the study indicated that leaching of nitrogen beyond the root zone increased with the level of nitrogen applied in both the methods of irrigation.
  Raj Kumar , G. Phani Kumar , OP Chaurasia and Shashi Bala Singh
  Hippophae rhamnoides L. (Elaeagnaceae) also known as seabuckthorn, is a thorny, deciduous, temperate bush plant native to European and Asian countries. In India, it is widely distributed at high altitude, cold arid condition of Ladakh (Leh and Kargil), Himachal Pradesh, Sikkim and Arunachal Pradesh. H. rhamnoides has been used for the treatment of several diseases in traditional medicine in various countries throughout world. In Ladakh, the Sowa Rigpa system (Amchi System of medicine) has been using the plant parts in different herbal formulations. However, more scientific data is needed to support the various health claims. The various in vivo study of seabuckthorn oil reported to have anti-inflammatory, antioxidant, antimicrobial, anti-ulcer properties and hepatoprotective. Seabuckthorn oil is a unique source of high valued oils emphasizing its potential as a dietary and medicinal supplement and has become noted for its generally high levels of nutritionally and medicinally important components. The major unsaturated fatty acids were linolenic acid (omega-3) (20-23%), linoleic acid (omega-6) (40-43%), oleic acid (omega-9) (19-22%) and palmitoleic acid (1-3%) while the major saturated fatty acid contents were palmitic acid (7-9%), stearic acid (3-4%) in seed oil. Seabuckthorn pulp oil contains approximately 65% combined of the monounsaturated fatty acid and the saturated fatty acid. Both the seed and pulp oils are rich in Vitamin-E and β-Sitosterol. In addition, the pulp oil contains especially high levels of carotenoids. This ancient plant with its powerful and healing synergies has much to contribute to the livelihoods of high mountain people by utilizing this kind of hidden treasure of the Himalayas. In this review discusses on traditional use, phytochemistry and pharmacological data of the seabuckthorn oil.
  G. Phani Kumar , Raj Kumar and O.P. Chaurasia
  The study reveals that Ladakh is rich in medicinal flora and endemic diversity. The traditional knowledge on native plant species is highlights Amchi system of medicine and their traditional health-care system. The excessive extraction of medicinal plant resources for use in the pharmaceutical industry has resulted in ruthless destruction of natural populations of medicinal plants. Present study attempts to assess the current status of knowledge of medicinal plant resources and conservation status in Ladakh. An approach for prioritizing strategies for action is proposed which is a three step process, viz., technology development, technology dissemination, technology assessment and refinement. It also focuses on approach for prioritizing strategies for action is proposed.
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