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Abstract

 

This article in AJ

  1. Vol. 57 No. 6, p. 613-616
     
    Received: Apr 2, 1965


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doi:10.2134/agronj1965.00021962005700060029x

Soil and Plant Responses to Long-Term Fertilization of Alfalfa (Medicago sativa L.)1

  1. D. K. Markus and
  2. W. R. Battle2

Synopsis

Synopsis

Yields and persistence were greatly increased by K fertilization over a period of 9 years. Yields were not affected and persistence was reduced by N and P. P concentration in alfalfa hay was dependent on rainfall rather than on the P fertilizer. Levels of soil K and P supplies were considerably influenced by K and P. Continued alfalfa production was largely dependent on the relative abundance of K provided by fertilization. P from the soil supply was sufficient for maximum yields, but supply was depleted without application of P.

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