For grassland the soil chemical characteristics were: sand 42.0%, silt 35.0%, clay 23.0% (loam soil), pH 8.01, organic C 16.19 g/kg, total N 3.90 g/kg, C/N 4.11, total CaCO 3 140 g/kg, available phosphorus (P 2 O 5 ) 174.71 mg/kg, exchangeable potassium 0.62 meq/100 g, exchangeable magnesium 0.96 meq/100 g, exchangeable calcium 15.5 meq/100 g, exchangeable sodium 0.06 meq/100 g, EC 0.126 dS/m
Duarte AC, Porter JC, Leandro MJ
Commissioned services can play a vital role in this, offering safeguarding that extends beyond what schools can realistically provide and can offer confidentiality and reassurance for students to disclose drug use without fear of stigmatisation or consequences to protective factors
But such estimates are derived from a simulation based on the subjective guestimates of eight experts