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In tropical agroecosystems, limited N availability remains a major impediment to increasing yield. A 15N-recovery experiment was conducted in 13 diverse tropical agroecosystems. The objectives were… (More)
Changes in the chemistry of an acidic grey massive earth soil in response to various ameliorant treatments (gypsum and phosphogypsum in the presence or absence of lime) were investigated in a… (More)
Recent findings have highlighted the possibility of increased fluoride (F) concentrations in herbage through F taken up from soil via the plant root. This paper aimed to assess the risk of F… (More)
The release of non-exchangeable (fixed) NH 4 + and the importance of exchange-able NH 4 + at transplanting (initial exchangeable NH 4 + ) for rice (Oryza sativa L.) growth was studied in… (More)
Phosphorus deficiency is a major constraint to crop production in the humid and sub-humid tropics, as most of the soils in these regions are inherently low in total P and possess a high phosphate… (More)