|Moldenhauer, Karen - UA RREC|
|Mckenzie, Kent - CA COOP RICE RES FOUND|
Submitted to: Expert Consultation Proceedings
Publication Type: Proceedings
Publication Acceptance Date: September 5, 2000
Publication Date: N/A
Interpretive Summary: Interpretive summary not required.
Technical Abstract: In the last half-century, USA rice yields grew from 2.7 to 6.7 mt/ha. As in other crops, about half of the increase is due to improved varieties. Over the last decade average farm yields in the USA have been 83-86% of standard varieties in experiment station trials, and 74 to 79% of elite experimental lines. There is no sustained evidence of a national yield decline in USA rice. Continued yield increases are expected in the future from the combination of incremental improvements in varieties and fine- tuning of best management practices tailored to the new varieties.