Mortvedt, John J. Micronutrients in agriculture - 2 ed. - Madison : Soil Science Society of America, 1991 - 760 p. ; gráfs. - SSSA. Book series ; 4 . - SSSA. Book series ; 4 . LCCN: 9773 Subjects--Topical Terms: Elementos menores.Plantas--Elementos minerales.Suelos--Elementos minerales. Dewey Class. No.: 631.411 / M6 1991