Рет қаралды 3,670
#estimation of #available #nitrogen in #soil by #alkaline #permanganate #method subhi & asija 1956
Available N ( Kg/ha) = R ( titrate reading - blank reading) * normality of acid * weight of soil *0.014*weight of one heotare of soil ( top of 15cm depth)
=R*0.02*1/5*0.014*2.24*10 6