How many lbs of N will get when I irrigate?
lb./acre = 0.23 x Cw x Di
where,
Cw = concentration of nitrate-nitrogen in the irrigation water (ppm)
Di = depth of irrigation water applied (inches)
Nitrate in Irr Water 20.0 ppm
Depth of application 1.0 Inches
Nitrogen Applied 4.6 lbs/acre