31 January 2010
© 1996-2010
— A. Forrest Troyer. Background of U.S. Hybrid Corn II (2004)
|
|
|---|---|
|
|
|
Since 1950, the USA has never gone so long (8 yr) without an increase in record yield of corn. The average interval between record U.S. average corn yields for this period (1950–1994) is 2.1 yr. This recent delay in record yield increase is probably because of more emphasis on insect and herbicide resistance and less emphasis on yield per unit area. The regression of U.S. average corn yield on years for the decade (1994–2003) since transgenic corn is about two-thirds (b = 85.4 vs. 125.4 kg ha-1 or 1.4 vs. 2.0 bushels acre-1) of that for the period (1950–1994) when conventional breeders bred all hybrid corn. — A. Forrest Troyer. Background of U.S. Hybrid Corn II (2004) |
|
 What's New?  |
 Anomalous HeredityMutants, freaks, exceptions |
 Rose Gallery |
|---|---|---|
| Fadjar's
Rainlilies Indonesian beauties |
Rose
Breeding & Links |
Crinum & Amaryllis Descriptions and pictures |
| Help Me Find/Rose Look for them here |
Amaryllids & geophytes | Belladonna News My amaryllis research |
| Rose & Bulb
Sources |
Iris Information | Sloane's Red Lily A tale of taxonomic confusion |
Other Sites of Interest |
||
| Sweet Corn Growing Tips With a history of corn |
Fancy Hibiscus Winn Soldani's Collection |
International Bulb Society The source of information on geophytic plants. |
| Rose Hybridizers Association Learn more about breeding your own roses. |
Capt. Hook Bio-Piracy Who's zooming who? |
emaryllis Amaryllis information and pictures |
| Panos & Stavros Bulbs and succulents |
Tom's Garden Interesting Hybrids |
Victory Horticultural Library Fostering Historical Research |
| Plants
and Japan Check out the articles on Morning Glories, red rice. |
Anthocyanins What some genes do. |
Dahlias
in British Columbia Holland's spectacular Dahlias. Some are fragrant! |