Rhizobium inoculant for soybean [Glycine max (L.) Merrill] in Mekong Delta
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Soybean cultivar MTD10 cultivated on a moderate acid paddy soil of the Mekong Delta responded well to a multistrain inoculation and to chemical nitrogen fertilizer. However, the efficiency of chemical nitrogen uptake by the uninoculated plants decreased with increasing nitrogen application rate. Inoculation improved all examined agronomic characteristics of plants. Inoculated plants produced grain yield 10 times greater than the uninoculated controls and 2.5 times greater than the uninoculated plants receiving 80 kg/ha of chemical nitrogen. Inoculation was superior to chemical nitrogen fertilization in all parameters of importance to market-oriented farmers.
Key wordsAcid soils Nitrogen fertilizer Rhizobium Soybean
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