diff --git a/08-data_exploration.Rmd b/08-data_exploration.Rmd index 9e86ead..6d8b453 100644 --- a/08-data_exploration.Rmd +++ b/08-data_exploration.Rmd @@ -66,33 +66,33 @@ In this case, the data dictionary can help us make sense of what sort of values :::{.dictionary} -**site_id** Unique letter and number site name -**full_name** Full site name -**As_EPA3051** Arsenic (mg/kg), EPA Method 3051A. Quantities < 3.0 are not detectable. -**Cd_EPA3051** Cadmium (mg/kg), EPA Method 3051A. Quantities < 0.2 are not detectable. -**Cr_EPA3051** Chromium (mg/kg), EPA Method 3051A -**Cu_EPA3051** Copper (mg/kg), EPA Method 3051A -**Ni_EPA3051** Nickel (mg/kg), EPA Method 3051A -**Pb_EPA3051** Lead (mg/kg), EPA Method 3051A -**Zn_EPA3051** Zinc (mg/kg), EPA Method 3051A -**water_pH** -**A-E_Buffer_pH** -**OM_by_LOI_pct** Organic Matter by Loss on Ignition -**P_Mehlich3** Phosphorus (mg/kg), using the Mehlich 3 soil test extractant -**K_Mehlich3 Potassium** (mg/kg), using the Mehlich 3 soil test extractant -**Ca_Mehlich3** Calcium (mg/kg), using the Mehlich 3 soil test extractant -**Mg_Mehlich3** Magnesium (mg/kg), using the Mehlich 3 soil test extractant -**Mn_Mehlich3** Manganese (mg/kg), using the Mehlich 3 soil test extractant -**Zn_Mehlich3** Zinc (mg/kg), using the Mehlich 3 soil test extractant -**Cu_Mehlich3** Copper (mg/kg), using the Mehlich 3 soil test extractant -**Fe_Mehlich3** Iron (mg/kg), using the Mehlich 3 soil test extractant -**B_Mehlich3** Boron (mg/kg), using the Mehlich 3 soil test extractant -**S_Mehlich3** Sulfur (mg/kg), using the Mehlich 3 soil test extractant -**Na_Mehlich3** Sodium (mg/kg), using the Mehlich 3 soil test extractant -**Al_Mehlich3** Aluminum (mg/kg), using the Mehlich 3 soil test extractant -**Est_CEC** Cation Exchange Capacity (meq/100g) at pH 7.0 (CEC) -**Base_Sat_pct** Base saturation (BS). This represents the percentage of CEC occupied by bases (Ca2+, Mg2+, K+, and Na+). The %BS increases with increasing soil pH. The availability of Ca2+, Mg2+, and K+ increases with increasing %BS. -**P_Sat_ratio** Phosphorus saturation ratio. This is the ratio between the amount of phosphorus present in the soil and the total capacity of that soil to retain phosphorus. The ability of phosphorus to be bound in the soil is primary a function of iron (Fe) and aluminum (Al) content in that soil. +- **site_id** Unique letter and number site name +- **full_name** Full site name +- **As_EPA3051** Arsenic (mg/kg), EPA Method 3051A. Quantities < 3.0 are not detectable. +- **Cd_EPA3051** Cadmium (mg/kg), EPA Method 3051A. Quantities < 0.2 are not detectable. +- **Cr_EPA3051** Chromium (mg/kg), EPA Method 3051A +- **Cu_EPA3051** Copper (mg/kg), EPA Method 3051A +- **Ni_EPA3051** Nickel (mg/kg), EPA Method 3051A +- **Pb_EPA3051** Lead (mg/kg), EPA Method 3051A +- **Zn_EPA3051** Zinc (mg/kg), EPA Method 3051A +- **water_pH** +- **A-E_Buffer_pH** +- **OM_by_LOI_pct** Organic Matter by Loss on Ignition +- **P_Mehlich3** Phosphorus (mg/kg), using the Mehlich 3 soil test extractant +- **K_Mehlich3 Potassium** (mg/kg), using the Mehlich 3 soil test extractant +- **Ca_Mehlich3** Calcium (mg/kg), using the Mehlich 3 soil test extractant +- **Mg_Mehlich3** Magnesium (mg/kg), using the Mehlich 3 soil test extractant +- **Mn_Mehlich3** Manganese (mg/kg), using the Mehlich 3 soil test extractant +- **Zn_Mehlich3** Zinc (mg/kg), using the Mehlich 3 soil test extractant +- **Cu_Mehlich3** Copper (mg/kg), using the Mehlich 3 soil test extractant +- **Fe_Mehlich3** Iron (mg/kg), using the Mehlich 3 soil test extractant +- **B_Mehlich3** Boron (mg/kg), using the Mehlich 3 soil test extractant +- **S_Mehlich3** Sulfur (mg/kg), using the Mehlich 3 soil test extractant +- **Na_Mehlich3** Sodium (mg/kg), using the Mehlich 3 soil test extractant +- **Al_Mehlich3** Aluminum (mg/kg), using the Mehlich 3 soil test extractant +- **Est_CEC** Cation Exchange Capacity (meq/100g) at pH 7.0 (CEC) +- **Base_Sat_pct** Base saturation (BS). This represents the percentage of CEC occupied by bases (Ca2+, Mg2+, K+, and Na+). The %BS increases with increasing soil pH. The availability of Ca2+, Mg2+, and K+ increases with increasing %BS. +- **P_Sat_ratio** Phosphorus saturation ratio. This is the ratio between the amount of phosphorus present in the soil and the total capacity of that soil to retain phosphorus. The ability of phosphorus to be bound in the soil is primary a function of iron (Fe) and aluminum (Al) content in that soil. ::: @@ -247,4 +247,4 @@ QUESTIONS: 6. Create a histogram for _lead_ concentration, as well as a boxplot comparing lead concentration by region. Is the lead concentration similar among regions? Are there any outlier sites with unusually high or low lead concentrations? -::: \ No newline at end of file +:::