The Availability of P and K Contained in Pea and Fababean Residue to a Subsequent Crop

Assess the availability, release and use of P and K from field pea and fababean residues, to subsequest cereal crops.

IPNI-1995-CAN-SK16

To determine the role of phosphorus contained in pea and fababean residue as a source of nutrient to a following crop, in order to account for the contribution of P in pulse crop residues in fertilizer recommendations and better understand the overall fertility impact of including legumes in a rotation. Read more


Year of initiation:1995
Year of completion:1998
Map:

Interpretive Summary

Availability of Phosphorus Contained in Pulse Crop Residues to a Subsequent Crop, 1998 Pulse crops are becoming increasingly important in the Canadian Prairies. Last year, the region seeded 2. 6 million acres of peas and almost 1 million acres of lentils. Pulses use a lot of P and K and provide beneficial effects to following crops. This study, now complete, has been investigating P availability to wheat seeded in pulse stubble.

Availability of Phosphorus Contained in Pulse Crop Residues to a Subsequent Crop, 1997 This study is evaluating the role of above-ground pulse crop residue in supplying plant available P to a following crop. Pulses fix N and are known to improve subsequent crops, but the N they supply does not completely explain their beneficial effects. 1997 results show P also appears to play a minor role, but conditions were dry at the sites this year.

Availability of Phosphorus Contained in Pulse Crop Residues to a Subsequent Crop, 1996 Pulse crops are known to improve the yields of subsequent crops and are becoming important in crop rotations in western Canada. This study is trying to determine why. Nitrogen released from the decomposing residues does not appear to have much of an effect so scientists at the U. of S. are investigating if improved P nutrition can help explain the beneficial effects.

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Updates & Reports

1998

1998 Annual Report

2001

Objectives

2001

Justification

2001

Project Description


Project Leader

Jeff Schoenau, University of Saskatchewan


Project Cooperators

None


IPNI Staff

Adrian Johnston


Location

Americas \ Northern America \ CAN \ Saskatchewan


Topics

4r source, crop rotations, nutrient management, nutrient removal

faba bean, field pea

Phosphorus (P), Potassium (K)