results of a nationwide survey to determine feedstuffs fed to lactating dairy cows. | a nationwide survey to determine feedstuffs used in the diets of dairy cows was conducted. this survey was mailed to dairy nutritionists at universities in each state to describe the use of 144 feedstuffs. twenty-eight states responded and were grouped by region as follows: northeast (maine, maryland, new hampshire, new york, ohio, vermont, and west virginia), northwest (idaho, oregon, and washington), midwest (iowa, illinois, michigan, minnesota, missouri, nebraska, north dakota, south dakota, ... | 1999 | 10068966 |
effect of environment on resistance to the european corn borer (lepidoptera: crambidae) in maize. | the european corn borer, ostrinia nubilalis (hübner) (lepidoptera: crambidae), is a major pest of maize, zea mays l., in many temperate parts of the world. genotype-by-environment interaction effects can make relative performance unpredictable and may hamper selection for resistance to european corn borer. the objective of this study was to determine the effect of environment on genotypic reaction to european corn borer resistance in maize. a set of 12 maize inbred lines was chosen to represent ... | 2004 | 15568368 |