INTERNATIONAL plant quarantine regulations now frequently require that imported plant material should be free from soil and should be accompanied by a certificate that the material was grown in soil ...
LARVÆ of the beet eelworm (Heterodera schachtii Schmidt) are essentially water-inhabiting creatures, and their behaviour in the soil is governed by the properties of the soil water. The results of an ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results