variable	description
Al_AL	Plant-available aluminium in soil, estimated by extraction with ammonium acetate lactate (AL)
amendment_C_org	Organic carbon in amendment
amendment_C_tot	total carbon in amendment
amendment_Ca	total amount of calcium in amendment
amendment_Cd	total amount of cadmium in amendment
amendment_Cu	total amount of copper in amendment
amendment_dry_matter	Amendment dry matter content
amendment_K	total amount of potassium in amendment
amendment_Mg	total amount of magnesium in amendment
amendment_Mn	total amount of manganese in amendment
amendment_N_org	organic nitrogen in amendment
amendment_N_tot	total nitrogen in amendment
amendment_NH4_N	total amount of ammonium-nitrogen in amendment
amendment_P	total amount of phosphorus in amendment
amendment_S	total amount of sulfur in amendment
Ca_AL	Plant-available calcium in soil, estimated by extraction with ammonium acetate lactate (AL)
Fe_AL	Plant-available iron in soil, estimated by extraction with ammonium acetate lactate (AL)
K_AL	Plant-available potassium in soil, estimated by extraction with ammonium acetate lactate (AL)
K_HCl	Potassium in soil, measured by HCl extraction
P_AL	Plant-available phosphorus, estimated by extraction with ammonium acetate lactate (AL)
P_HCl	phosphorus in substance, determined after extraction with HCl
pH_H2O	Soil pH, measured in ultrapure water in 1:5 ratio (soil:solution, volume:volume)
tot_C_crop	Total amount of carbon in crop
tot_C_soil	Total amount of carbon in soil
tot_Cu_crop	Total amount of copper in crop
tot_K_crop	Total amount of potassium in crop
tot_Mg_soil	Total amount of magnesium in soil
tot_Mn_crop	Total amount of manganese in soil
tot_N_crop	Total amount of nitrogen in crop
tot_N_soil	Total amount of nitrogen in soil
tot_P_crop	Total amount of phosphorus in crop
tot_P_soil	Total amount of phosphorus in soil
tot_S_crop	Total amount of sulfur in crop
tot_S_soil	Total amount of sulfur in soil
yield	Total biomass