title: Examining farmland applications of composted biosolid wastes depending on nutrient balance in soils.
abstract: This study emphasizes nutrient balance of soils in the farmland application of composted biosolid wastes. The loading rates of plant nutrients following the compost application to farmland in Japan were estimated and compared with the nutrient uptake of agricultural plants. Results show that the current compost application in Japan can meet the requirements of agricultural plants for plant nutrient Ca, except for K, Mg, P, Fe, Mn, Cu, and Zn. The compost application could realize the safe disposal of biosolid wastes and the effective recycling of plant nutrients in composts to soils without causing heavy metal accumulation. The application manner of composts affects the heavy metal accumulation in farmlands. Field examination indicates that the excessive compost application has led to the heavy metal accumulation in compost-amended farmlands. Measuring the nutrient balance in compost-amended farmlands is well suitable for explaining the accumulation of heavy metals, such as Cu and Zn.
authors.affiliation: Department of Civil and Environmental Engineering, Yamaguchi University, Ube, Yamaguchi, Japan.
authors.forename: Yu-Yu
authors.initials: YY
authors.lastname: Liu
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Imai
authors.forename: Masao
authors.initials: M
authors.lastname: Ukita
authors.forename: Masahiko
authors.initials: M
authors.lastname: Sekine
authors.forename: Takaya
authors.initials: T
authors.lastname: Higuchi
mesh_terms: D000383:Agriculture / Q000379:methods*; D001673:Biodegradation, Environmental; D018556:Crops, Agricultural / Q000378:metabolism*; D007564:Japan; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants