NOVEMBER 2015 CERTIFICATION PROGRAM Landscape/Turf Specialty Commercial Examination Equations Page 1 of 2 Basic and non-irrigation equations and conversions are assumed to be known by candidates. POI refers to Principles of Irrigation, 3 nd ed. Dec. 2012. Irrigation Association. 6 th ed. refers to Irrigation, Irrigation Association. Handbook refers to Handbook of Technical Irrigation Information, Hunter, 2010. The equations are presented in the latest IA format and may appear different from those presented in the reference material. 1 cubic meter of water = 1,000 liters 1mm = 1 l/m 2 1mm = 10 kl/ha 1 liter water weighs 1 kg PAW AW RZ × POI 2-4 AD PAW (MAD / 100) × POI 2-5 c o c ET ET K POI 2-8 = 5,988 × × × ×( 100 ) POI 5-8 = ×× ( 100 ) 5,988 × POI 5-8a This space intentionally left blank. = 5,988 × × ×( 100 ) POI 5-8 = 0.102 × POI 8-1 Q A V × POI 8-2 = 1.273 × 2 POI 8-3 2 v V H 2 g × POI 8-4 2 2 1 2 p1 1 p2 L 2 V V H Z H Z H 2 g 2 g × × 6 th ed. Ch. 7 p. 233 2 z z V H k 2 g Z= various values depending upon equation POI 8-8, 8-9. 8-10, 8-11 2 2 1 2 2 D K 1 D POI 8-12 2 2 1 2 2 D K 0.7 1 D × POI 8-13 = 2.38 × 10 8 ×( 100 ) 1.852 × 1.852 4.866 × 100 POI 8-7 = × 6 th ed. Ch. 7 p. 253 0 0 Q P Q P 6 TH ed. Ch. 7 p. 254