Matches in SemOpenAlex for { <https://semopenalex.org/work/W2134668764> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W2134668764 endingPage "64" @default.
- W2134668764 startingPage "59" @default.
- W2134668764 abstract "Abstract On-farm field demonstrations provide a useful method of technology transfer for researchers and extension specialists, and the proponents of alternative agriculture have adopted on-farm experimentation as an important means to establish the value of sustainable methods. For on-farm research long narrow strips harvested by machine are often employed in place of small hand-harvested plots commonly used at research facilities. The use of this approach, however, could bring the methodology into question if field variation should make determination of statistical differences difficult. Analysis of harvest data from ten irrigated and four dryland site-years for small hand-harvested corn plots and for machine-harvested long narrow strips was conducted to determine the impact of sampling method upon experimental variation. Analyses of variance indicated that six of the ten machine-harvested irrigated sites had significant yield response to applied nitrogen while only one of the ten hand-harvested sites exhibited significant nitrogen effects (P ≤ 0.10). The difference in statistical precision was not a result of increased range in yields, but rather of more consistent yields for each treatment. An economic analysis was performed, and the results indicated that optimum nitrogen rates depended on corn and nitrogen price ratios. When 1989 corn and nitrogen prices were used, the calculated marginal profit levels between the reduced nitrogen and recommended nitrogen rate ranged from $8.92 to -$8.14 per ha. For the irrigated sites, when experimental variation (F-test of total sum of squares) was compared by harvest method, hand harvest had significantly greater variation than machine harvest in five experiments. Machine harvest was significantly more variable in one comparison. Coefficients of variation for machine harvest were less than for hand harvest in nine of ten irrigated experiments. For the dryland sites, differences between harvest methods were significant in one of four experiments. These data suggest that under certain conditions machine-harvested long narrow strips provide more accurate estimates of treatment differences than do small hand-harvested plots despite potential differences in soil texture, soil fertility, or available soil water." @default.
- W2134668764 created "2016-06-24" @default.
- W2134668764 creator A5029487092 @default.
- W2134668764 creator A5040576220 @default.
- W2134668764 creator A5042391058 @default.
- W2134668764 date "1989-06-01" @default.
- W2134668764 modified "2023-10-14" @default.
- W2134668764 title "Comparison of harvest techniques for corn field demonstrations" @default.
- W2134668764 cites W2021460358 @default.
- W2134668764 cites W2046448693 @default.
- W2134668764 cites W2047662833 @default.
- W2134668764 cites W2054418766 @default.
- W2134668764 cites W2094949632 @default.
- W2134668764 doi "https://doi.org/10.1017/s0889189300002733" @default.
- W2134668764 hasPublicationYear "1989" @default.
- W2134668764 type Work @default.
- W2134668764 sameAs 2134668764 @default.
- W2134668764 citedByCount "21" @default.
- W2134668764 countsByYear W21346687642012 @default.
- W2134668764 countsByYear W21346687642015 @default.
- W2134668764 countsByYear W21346687642018 @default.
- W2134668764 countsByYear W21346687642020 @default.
- W2134668764 countsByYear W21346687642022 @default.
- W2134668764 crossrefType "journal-article" @default.
- W2134668764 hasAuthorship W2134668764A5029487092 @default.
- W2134668764 hasAuthorship W2134668764A5040576220 @default.
- W2134668764 hasAuthorship W2134668764A5042391058 @default.
- W2134668764 hasConcept C105795698 @default.
- W2134668764 hasConcept C118518473 @default.
- W2134668764 hasConcept C127413603 @default.
- W2134668764 hasConcept C134121241 @default.
- W2134668764 hasConcept C140793950 @default.
- W2134668764 hasConcept C178790620 @default.
- W2134668764 hasConcept C185592680 @default.
- W2134668764 hasConcept C18903297 @default.
- W2134668764 hasConcept C191897082 @default.
- W2134668764 hasConcept C192562407 @default.
- W2134668764 hasConcept C33923547 @default.
- W2134668764 hasConcept C39432304 @default.
- W2134668764 hasConcept C537208039 @default.
- W2134668764 hasConcept C6557445 @default.
- W2134668764 hasConcept C86803240 @default.
- W2134668764 hasConcept C88463610 @default.
- W2134668764 hasConceptScore W2134668764C105795698 @default.
- W2134668764 hasConceptScore W2134668764C118518473 @default.
- W2134668764 hasConceptScore W2134668764C127413603 @default.
- W2134668764 hasConceptScore W2134668764C134121241 @default.
- W2134668764 hasConceptScore W2134668764C140793950 @default.
- W2134668764 hasConceptScore W2134668764C178790620 @default.
- W2134668764 hasConceptScore W2134668764C185592680 @default.
- W2134668764 hasConceptScore W2134668764C18903297 @default.
- W2134668764 hasConceptScore W2134668764C191897082 @default.
- W2134668764 hasConceptScore W2134668764C192562407 @default.
- W2134668764 hasConceptScore W2134668764C33923547 @default.
- W2134668764 hasConceptScore W2134668764C39432304 @default.
- W2134668764 hasConceptScore W2134668764C537208039 @default.
- W2134668764 hasConceptScore W2134668764C6557445 @default.
- W2134668764 hasConceptScore W2134668764C86803240 @default.
- W2134668764 hasConceptScore W2134668764C88463610 @default.
- W2134668764 hasIssue "2" @default.
- W2134668764 hasLocation W21346687641 @default.
- W2134668764 hasOpenAccess W2134668764 @default.
- W2134668764 hasPrimaryLocation W21346687641 @default.
- W2134668764 hasRelatedWork W1031909981 @default.
- W2134668764 hasRelatedWork W1976946635 @default.
- W2134668764 hasRelatedWork W1997150432 @default.
- W2134668764 hasRelatedWork W2020142228 @default.
- W2134668764 hasRelatedWork W2142750672 @default.
- W2134668764 hasRelatedWork W2354066189 @default.
- W2134668764 hasRelatedWork W2938887664 @default.
- W2134668764 hasRelatedWork W2977245384 @default.
- W2134668764 hasRelatedWork W3000403550 @default.
- W2134668764 hasRelatedWork W3126748322 @default.
- W2134668764 hasVolume "4" @default.
- W2134668764 isParatext "false" @default.
- W2134668764 isRetracted "false" @default.
- W2134668764 magId "2134668764" @default.
- W2134668764 workType "article" @default.