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http://physics.info/density/ Urea cost= 0.6*Ammonia price+15 indian fertiliser imports history  downloadable with statistics Globaltradedta  of ammonia in india all types of units conversion at http://www.webqc.org/unitconverters.php How to convert ppm to percent 1% = 1/100 1ppm = 1/1000000 So 1ppm = 0.0001% So to convert from ppm to percent, divide the ppm by 10000: x (%)  =  x ( ppm)  / 10000 Example: find how many percent are in 300ppm. x (%)  = 300ppm / 10000 = 0.03% ppm to percent conversion table ppm Percent (%) 0 ppm 0.0000% 1 ppm 0.0001% 2 ppm 0.0002% 3 ppm 0.0003% 4 ppm 0.0004% 5 ppm 0.0005% 6 ppm 0.0006% 7 ppm 0.0007% 8 ppm 0.0008% 9 ppm 0.0009% 10 ppm 0.0010% 20 ppm 0.0020% 30 ppm 0.0030% 40 ppm 0.0040% 50 ppm 0.0050% 60 ppm 0.0060% 70 ppm 0.0070% 80 ppm 0.0080% 90 ppm 0.0090% 100 ppm 0.0100% 200 ppm 0.0200% 300 ppm 0.0300% 400 ppm 0.0400% 500 ppm 0.0500% 600 ppm 0.0600% 700 ppm 0...

here some of the rules to avail concession through indian railway journey for students and youth VII Youths 34 Youths attending National Integration Camps of :- (a) National Youth Project (b) Manav Uththan Sewa Sami ti -- 50% in 2 nd  and SL class -- 40% in 2 nd  and SL class< 35 Unemployed youths : (i) To attend interview for job in Public Sector Organisations (i.e. Central/ State Govt offices, Statutory Bodies, Municipal Corporation, Govt Under-taking, University or Public Sector Body.) (ii) To attend interviews for jobs in Central & State Govt. -- 50% in 2 nd  and SL class -- 100% in 2 nd  class -- 50% in SL class 36 Bharat Scouts & Guides - for scouting duty. -- 50% in 2 nd  and SL class VIII Kisans 37 Kisans and Industrial Labourers - for visit to agricultural/industrial exhibitions. -- 25% in 2 nd  and SL class 38 Kisans traveling by Govt. sponsored Special trains. -- 33% in 2 nd  and SL class 39 Kisans & Milk Producers -...