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This article in AJ

  1. Vol. 60 No. 5, p. 576-577
     
    Received: Jan 15, 1968


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doi:10.2134/agronj1968.00021962006000050040x

Response of Plants to Polyphosphate on Calcareous Soils1

  1. J. L. Stroechlein,
  2. S. A. Sabet and
  3. D. M. Clementz2

Abstract

Abstract

Ammonium polyphosphate (APP) was compared to ammonium orthophosphate (AOP) with successive crops grown on four calcareous soils in the greenhouse. Barley (Hordeum vulgare) the first crop, responded to P on three of the soils, with AOP superior to APP on two soils. With tomatoes (Lycopersicon esculentum), the second crop, APP was significantly better than AOP on all soils. APP was a satisfactory P source and was superior to AOP for the second crop.

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