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Phosphorus Movement in Calcareous Soils Irrigated with Waste Water from Potato Processing Plants
Author(s) -
Robbins C. W.,
Smith J. H.
Publication year - 1977
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1977.00472425000600020025x
Subject(s) - calcareous , phosphorus , soil water , organic matter , wastewater , environmental science , chemistry , agronomy , environmental chemistry , environmental engineering , botany , soil science , biology , organic chemistry
Total, organic, and acid‐hydrolyzable phosphorus and orthophosphate concentrations were determined in waste waters from five potato ( Solanum tuberosum L.) processing plants and the waste water volumes applied to cropped land were measured monthly for three processing seasons. These P forms were also measured in soil water samples extracted monthly at five depths to 1.5 m. Organic plus hydrolyzable fractions comprised 60 to 70% of the total P in the waste waters and 30 to 40% in the soil water extracts. When the numerical value of the relationship (kg P/ha applied per month) (mm of clay size material in 1.5 m) −1 was < 0.4, the total P concentration in the extracts at 1.5 m was < 0.05 mg/liter. When the value exceeded 0.4, the total P concentrations in the extracts averaged 1 to 2 mg/liter. The relationship may provide disposal site selection and waste water application rate guidelines for land disposal of waste water high in organic and hydrolyzable P.