Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53865#.VNm0dSzQrzE Author(s)    Osmário J. L. Araújo 1 , Milena S. Pinto 1 , Marcus V. L. Sperandio 1 , Leandro A. Santos 1 , Elvia M. L. M. Stark 1 , Manlio S. Fernandes 1 , André Marques dos Santos 2* , Sonia Regina de Souza 2   Affiliation(s) 1 Plant Nutrition Laboratory, Department of Soil, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil . 2 Plant Biochemistry Laboratory, Department of Chemistry, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil . ABSTRACT Four genetically contrasting rice varieties (IAC-47, Bico Ganga, Arroz de Revenda and Manteiga) according to Random Amplified Polymorphic DNA (RAPD) analysis were assessed regarding expression of the genes OsNRT1.1, OsNRT2.1 and OsNRT2.2 and the nitrate uptake kinetics parameters (Km and Vmax). Up to 250-fold increases in the induction of gene expression after ni...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53245#.VLh5NMnQrzE Author(s) Rashid Waseem Khan Qadri 1 , Imran Khan 2* , Muhammad Muzammil Jahangir 1 , Umair Ashraf 3 , Ghufrana Samin 4 , Ammara Anwer 1 , Muhammad Adnan 1 , Mohsin Bashir 1   Affiliation(s) 1 Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan . 2 Department of Agronomy, University of Agriculture, Faisalabad, Pakistan . 3 Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China . 4 University of Engineering and Technology (Lahore) Faisalabad Campus, Faisalabad, Pakistan . ABSTRACT Growth, yield and quality of potato are greatly affected by its nutritional management. Foliar application of urea reduces nitrogen losses and increases plant nitrogen use efficiency. This study was therefore planned to evaluate the effect of soil applied phosphorus (DA...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53208#.VLcnXMnQrzE Author(s)    Qiao Luo 1,2,3 , Yong Li 1,2* , Yuyuan Li 1,2 , Xinliang Liu 1,2,3 , Runlin Xiao 1,2 , Jinshui Wu 1,2   Affiliation(s) 1 Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China . 2 Changsha Research Station for Agricultural & Environmental Monitoring, Changsha, China . 3 The University of Chinese Academy of Sciences, Beijing, China . ABSTRACT Groundwater quality varies not only in space but also in time. In order to analyze the spatiotemporal variety of ground water quality, the concentration of ammonium nitrogen (NH 4 N), nitrate nitrogen (NO 3 N), total nitrogen (TN) and total phosphorus (TP) in very shallow groundwater were investigated in a red-soil catchment in subtropical central China, based on a three-dimensiona...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52650#.VJzPMcCAM4 Author(s)   Jaap Jan Schröder Affiliation(s) Plant Sciences Group, Wageningen University and Research Centre, Wageningen, The Netherlands . ABSTRACT Our attitude towards mineral nitrogen (N) fertilizers is ambivalent. N fertilizers have on one hand increased our supply of food, feed and other bio-based raw materials tremendously and also improved the use efficiency of land and labor, but have on the other hand a negative impact on the quality of the environment and contributed to the depletion of fossil fuel reserves. This awareness has resulted in strong pleas to spend much more attention to the recycling o...