|
|
|
Interpretive Summaries:
1998 - Influence of Tillage and Phosphorus Rate and Placement on Corn Yields
1997 - Influence of tillage and phosphorus rate in placement on corn and bean yields
1996 - Influence of Tillage and Phosphorus Rate and Placement on Corn and Bean Yields
Influence of Tillage and Phosphorus Rate and Placement on Corn Yields, 1998
This project evaluated phosphorus (P) management in conventional and ridge tillage systems for corn production in western Washington. It was initiated in 1996 and terminated at the end of 1998.
Silage yields and total P uptake were not appreciably affected by annually applying P2O5 at 0, 30, 60, and 90 lb/A. However, P uptake tended to be higher in the last two years for the ridge tillage system; this was especially obvious during the early stages of growth. The ridge tillage system allowed repeated banding of P in the same P-enriched zone, which would account for the higher P availability and plant uptake.
Minimum tillage of corn has become an important management tool for reducing soil erosion. However, this necessitates surface or shallow incorporation of fertilizer that may result in enriched surface soil and depleted subsoil of immobile nutrients such as P, leading to reduced yields. This program attempted to define management strategies to overcome this problem. WA-09F
|
|
