Influence of Biochar Application and Gypsum Content on some Hydrophysical Characteristics of a Gypsiferous Soil

Abstract Laboratory experiments were carried out to study the effect of biochar addition and gypsum content on some hydrophysical properties soil quality index. Soil samples with (G2) 100, (G3) 150, (G4) 200, (G5) 250 (G6) 350 g kg -1 , prepared by mixing a surface sample for depth 0-10 cm (G1) 60 subsurface from 60-100 (G7) 443 at research station College Agriculture / Tikrit University. was imported Plantonix company, boichar mixed ratio (B0) 0,(B1) 20, (B2) 40,(B3) 60,(B4) 80 then moistened spraying within two-thirds field capacity, incubated in open plastic containers continuous stirring daily two months purpose homogenization. After end incubation period, air dried passed through sieve 2 mm openings. Mean Weight Diameter (MWD) gave highest values is 4.68,4.29,4.03,3.75 2.57 levels, respectively. While it less value comparison treatment. physical index when treatment G4B3 reached 0.045 (good) while lowest G1B2 0.024 (weak or weak).and results Infiltration decreased reaching 1.29 cm. Despite this, significantly superior treatment, which amounted 0.97 Then increased increasing content. They 0.97, 1.64, 1.54, 1.98 B4–B0,