Fertilizers and manures /
Simpson, Ken.
Fertilizers and manures / K. Simpson. - London : Longman, 1986. - 254 p. : ill. ; 22 cm. - Longman handbooks in agriculture .
Fertilizers.
Manures.
631.8 / 1
Fertilizers and manures / K. Simpson. - London : Longman, 1986. - 254 p. : ill. ; 22 cm. - Longman handbooks in agriculture .
Fertilizers.
Manures.
631.8 / 1