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This article in AJ

  1. Vol. 75 No. 6, p. 993-996
    Received: Aug 9, 1982



Response of Several Genetic Sources of Corn to Acidic Soil1

  1. Kishor Sherchan,
  2. Roscoe Ellis,
  3. David A. Whitney and
  4. Clyde E. Wassom2



Plants differ in their ability to take up nutrients. Developing genotypes efficient in utilizing nutrients from acid or low nutrient soils would aid in growing crops successfully when mineral supplementation is not feasible. This study was conducted in the greenhouse using mine spoil soil of initial pH 3.9 with variables of genetic sources of corn (Zea mays L.) and lime rates. Genetic source variability was more pronounced under stress conditions (low pH) than under nonstress conditions. The genetic sources PI270083, PI270080, and Va17 showed higher tolerance to acidic conditions than others. Inbred C105, highly susceptible to low pH, showed the most visual root damage as well as the lowest relative dry matter yield. Aluminum concentration in the plant tissue did not vary significantly with lime level; however, exchangeable Al in the soil decreased drastically as the level of lime application increased. Manganese in the plant tissue and in the soil (DTPA extractable) both decreased with increased lime rate. Dry matter yield decreased significantly at 16 500 kg ha−1 of lime compared with 8000 kg ha−1. Phosphorus concentration decreased in the plant as well as in the soil (Bray P-1 extractable) at 16 500 kg ha−1 lime, which could have been a factor in reduced yield. Genetic source by lime interaction was significant for Ca, Mg, Al, and Mn concentration indicating that selection under different pH levels would be productive.

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