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Relationship between duration of practice and soil chemical characteristics of upland fields under organic farming in Japan
Author(s) -
Nakagawa S.,
Kuwamura T.,
Yamada K.,
Yamamoto H.,
Hatakenaka K.,
Yonekura K.
Publication year - 2018
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/sum.12419
Subject(s) - organic farming , nitrogen , duration (music) , agriculture , phosphorus , environmental science , agronomy , sulfur , organic component , nitrate , environmental chemistry , chemistry , ecology , biology , art , literature , organic chemistry
Relationships between the duration (in years) of practice and soil (0–30‐cm layer) chemical properties of 189 upland fields under organic farming in Japan were investigated. Electrical conductivity and available phosphorus (P), nitrate nitrogen ( NO 3 ‐N), Cl − and sulphate sulphur ( SO 4 ‐S) decreased and became constant with increasing duration of practice. This was probably because of the absence of mineral fertilizers and the reduced use of animal‐based fertilizers as the duration of organic farming increased.