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Soil cation and water distribution as affected by ammonium nitrate applied through a drip irrigation system


Soil cation and water distribution as affected by ammonium nitrate applied through a drip irrigation system



Journal of the American Society for Horticultural Science 107(6): 1142-1148



ISSN/ISBN: 0003-1062

'Redglobe' peaches [Prunus persica (L.) Batsch] were grown under drip irrigation. Applications of NH4NO3 through the irrigation system were compared with broadcast applications. Soil pH, where NH4NO3 was applied through the irrigation system, decreased in the top 30 cm from 6.2 to 3.7 pH in the zone wetted by emitters that had been in place for 2 yr, and from 6.2 to 4.5 pH in the zone where emitters had been in place for 6 mo. Al concentration in wetted zones increased from 0.01 to 1.45 meq/100 g of soil after 2 yr and from 0.02 to 0.73 meq/100 g of soil after 6 mo. of NH4NO3 application through drip irrigation. Soil Ca and Mg concentrations were reduced in both wetted zones, but the greatest decrease occurred in the 2-yr emitter site. The addition of NH4NO3 in the irrigation water substantially reduced root growth in the vicinity of the emitters, irrigation water application, and fruit yield, because of the high Al concentration in the wetted zone.

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Accession: 006433192

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