Aluminum and calcium constraints to continuous crop production in a Brazilian Amazon Oxisol
Material type:
ArticleLanguage: En Publication details: 1992ISSN: - 0002-1962
- 93-063733
| Item type | Current library | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|---|
| Article | CIMMYT Knowledge Center: John Woolston Library | AGRIS Collection | 93-063733 (Browse shelf(Opens below)) | 1 | Available | 93-063733 |
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Acidity constraints in Oxisols of the Amazon may entail both Al toxicity and Ca deficiDEy. A field study was conducted in a Xanthic Hapludox near Manaus, Brazil, to evaluate lime and Ca requirements for corn (Zea mays L.), cowpea (Vigna unguiculata L.), soybean [Glycine max (L.) Merr.], and peanut (Arachis hypogea L.) during five consecutive years. Calcitic lime was applied once at rates of 0, 0.6, 1.2, 2.3, and 4.6 t of CaCO3 equivalent per hectare. The effects of 1 t ha-1 of gypsum, applied to four crops, were evaluated with lime rates of 0, 1.2 and 2.3 t ha-1. During the two initial years, maximum yields of corn and soybean occurred with 1.2 t of
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