David M Olszyk,Tamotsu Shiroyama,Jeffrey M Novak et al.
David M Olszyk et al.
We developed a rapid-test to screen for effects of biochar on seed germina- tion and soils. Crop seeds were placed in containers and covered with 15 g of soil with 1% biochar by weight. Two agricultural soils from South Carolina USA were us...
Chemical Extractability of Pb in Field-Contaminated Soils: Implications for Estimating Total Pb [0.03%]
铅污染土壤中铅的化学提取特性及其总量估算方法探讨
M B McBride,R Rao Mathur,Leslie L Baker
M B McBride
Lead (Pb) is frequently present in urban soils at concentrations of concern for human health. Regulations for this metal are based on total soil concentrations as determined by acid digestion, but a less expensive screening test for Pb woul...
Use of electron microprobe x-ray analysis for determination of low calcium concentrations across leaves deficient in calcium [0.03%]
扫描电镜X射线微分析法测定钙素缺乏叶片中的低浓度钙分布
D J Barta,T W Tibbitts
D J Barta
An electron microprobe with wavelength-dispersive x-ray spectrometry (WDS) was found to be useful for the determination of Ca concentrations in leaf tissue deficient in Ca. WDS effectively detected Ca concentrations as low as 0.2 mg/g dry w...