Citation Information

• Title : P and K fertilizer; yield performance and development of soil nutrient content as influenced by differentiated P and K inputs in a long-term study over 20 years.; P + K-Dungung: Ertragsleistung und Entwicklung der Bodennahrstoffgehalte in Abhangigkeit differenzierter P + K-Dungung, in einem Dauerversuch uber 20 Jahre.
• Source : Getreide Magazin
• Issue : 3
• Pages : 165-169
• Year : 2001
• Document Type : Journal Article
• Language : English
• Authors:
  • Roggenstein, V.
  • Fischbeck, G.
  • Dennert, J.
• Climates:
• Cropping Systems: Barley. Canola. Maize. Oats. Rye. Wheat.
• Countries: Germany.

Summary

A study was initiated in 1980 in Germany on a soil with 4% humus and 18.2 mg P 20 5/100 g soil and 35.7 mg K 20/100 g soil. Crops included winter wheat, barley, rye, oats, rape, and maize. Annual soil analyses showed an unexpectedly large variation following inputs of up to 60 kg P/ha and 80 kg K/ha. The difference in P and K supply between fertilized and unfertilized plots was around 20%. However, the effect on yields was less than might have been expected. Non-application of P did not influence yield, while non-application of K resulted in 5% decrease (despite high K availability). No direct relationship was found between soil analysis and yields.

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