| incidence of airborne aspergillus flavus spores in cornfields of five states. | airborne aspergillus flavus spores were rarely detected throughout the 1975 growing season by the agar plate method at cornfield sites in georgia, illinois, maryland, south carolina, and virginia. | 1978 | 416756 |
| 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 |
| verification of a european corn borer (lepidoptera: crambidae) loss equation in the major corn production region of the northeastern united states. | field studies in pennsylvania and maryland were conducted during 2000, 2001, and 2002 to test the applicability of published yield loss relationships developed in central pennsylvania for european corn borer, ostrinia nubilalis (hübner), management in warmer, longer season corn, zea mays l., grain production regions of the northeastern united states. both isoline hybrids and non-bt lead hybrids were compared against bacillus thuringiensis (bt) hybrids to measure effects of the pest on yield. the ... | 2005 | 15765671 |
| texas is the overwintering source of fall armyworm in central pennsylvania: implications for migration into the northeastern united states. | fall armyworm, spodoptera frugiperda (j. e. smith) (lepidoptera: noctuidae), infestations in most of north america arise from annual migrations of populations that overwinter in southern texas and florida. cytochrome oxidase i haplotype profiles within the fall armyworm corn strain, the subgroup that preferentially infests corn (zea mays l.), can differentiate the texas and florida populations. we use this molecular metric to show that fall armyworms in central pennsylvania originate from texas, ... | 2009 | 20021748 |
| predicting unsaturated zone nitrogen mass balances in agricultural settings of the united states. | unsaturated zone n fate and transport were evaluated at four sites to identify the predominant pathways of n cycling: an almond [prunus dulcis (mill.) d.a. webb] orchard and cornfield (zea mays l.) in the lower merced river study basin, california; and corn-soybean [glycine max (l.) merr.] rotations in study basins at maple creek, nebraska, and at morgan creek, maryland. we used inverse modeling with a new version of the root zone water quality model (rzwqm2) to estimate soil hydraulic and nitro ... | 2010 | 20400601 |