"7097","10","archive","19",,,"disk0/00/00/70/97","2013-09-12 11:03:54","2013-09-20 05:08:55","2013-09-12 11:03:54","article",,,"show","Library-ICRISAT@CGIAR.ORG",,,"","","","","","","","","","",,,,"Chien","S H","","","","","","","Bationo","A","","","","",,,,,"","",,,,,"","","International Fertilizer Development Center(Alabama)","USA","Agronomic evaluation of two unacidulated and partially acidulated phosphate rocks indigenous to Niger","pub","S1.5","","","restricted",,,,,,"A field study was conducted on a sandy soil in Niger to evaluate the agronomic effectiveness of various P fertilizers for millet production during 1985 to 1987. The P fertilizers tested were two finely ground phosphate rocks (PR) indigenous to Niger (Tahoua and Parc W rocks), PR partially acidulated with H2SO4 at 50% acidulation level (PAPR), single superphosphate (SSP), and triple superphosphate (TSP). In 1985, application rates were 0, 6.5, 13.0, and 19.5 kg P ha−1 for each of the P fertilizers. In 1986, half of the plots received the same rates of P as in 1985 and half of the plots received no additional P. In 1987, P additions were repeated only in half of the plots that received P during 1986. A significant (P = 0.05) millet response to P was observed in all the trials. The major findings of this study were: (i) finely ground Tahoua PR was more effective than Parc W PR because of its higher reactivity and was 82 to 91% as effective as SSP for millet production in both the initial and two subsequent seasons; (ii) partial acidulation of Parc W PR can significantly increase its agronomic effectiveness in the first year, but not in terms of residual effect; (iii) partial acidulation was not a desirable technology for increasing the effectiveness of Tahoua PR, because its high Fe2O3 plus Al2O3 content resulted in a product containing relatively low amounts of water-soluble P; and (iv) over a period of 3 yr, one initial application of a large dose of P fertilizer was found to be more effective than three small annual applications in terms of total grain production","1990","published",,"Soil Science Society of America Journal","54","6","Soil Science Society of America",,"1772-1777",,,,,,,,,,,"TRUE",,"0361-5995",,,,,,"","http://dx.doi.org/10.2136/sssaj1990.03615995005400060045x","http://scholar.google.co.in/scholar?as_q=Agronomic+Evaluation+of+Two+Unacidulated+and+Partially+Acidulated+Phosphate+Rocks+Indigenous+to+Niger&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C5","pub",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"7097",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Henao","J","","",,,,,,,,,,,,,,,,,,,,,,,"ICRISAT(Niamey)","Niger",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7097",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Christianson","C B","","",,,,,,,,,,,,,,,,,,,,,,,"IFDC-Africa(Lome)","Togo",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7097",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Bationo","A","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"7097",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Mokwunye","A U","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,