Features of the soil in organic farming field
1998
Taki, K. (Aichi-ken. Agricultural Research Center, Nagakute (Japan)) | Kato, T.
We surveyed the 11 organic farming fields and as well as their each neighboring conventional farming fields and compared the features of the two types of fields. The results were as follows: In terms of chemical compared characteristics, the soils in organic farming fields had a relatively much higher amount of total carbon, total nitrogen and cation exchange capacity than the soils in conventional farming fields. In the organic farming fields,the soils that had been applied with organic fertilizers made from animal residues had larger base-saturation percentage and larger amounts of available phosphate and acid-soluble zinc than the rest of the organic farming fields. In addition, the exchangeable base-accumulation reflected the organic fertilizer-components used. In terms of physical properties, the soils in organic farming fields had more water-stable aggregates, smaller solid phase ratios, higher water retentivities and higher plastic limit. In terms of biological properties, the soils in organic farming fields had larger numbers of soil animals, larger amounts of CO2 gas liberation and higher soil enzyme activities. The quinone profile was determined on two organic farming fields and their corresponding conventional field, in order to obtain information about the amount and variety of soil microorganisms. The results showed that the soils in organic farming fields had larger amount and varieties of quinone
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