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| Registros recuperados: 31 | |
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| Lowenberg-DeBoer, James. |
| This analysis works out the economic implications for variable rate seeding of the corn population response curves estimated by Pioneer Hi-Bred agronomists. Examples are developed for various mixes of low, medium and high yield potential soil, as well as for a range of seed costs and variable rate equipment costs. The strategies analyzed were: variable rate planting using agronomic recommendations for each yield potential zone, variable rate planting using an economic decision rule for each yield potential zone, an information strategy which sets the uniform planting rate at the highest population indicated by agronomic recommendations for any part of the field and a second information strategy which uses an economic decision rule for the whole field based... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Precision farming; Variable rate; Corn; GPS; Production economics; Crop Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/28685 |
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| Van Hung, Pham; MacAulay, T. Gordon; Marsh, Sally P.. |
| Land fragmentation, where a single farm has a number of parcels of land, is a common feature of agriculture in many countries, especially in developing countries. In Vietnam, land fragmentation is common, especially in the north. For the whole country, there are about 75 million parcels of land, an average of seven to eight plots per farm household. Such fragmentation can be seen to have negative and positive benefits for farm households and the community generally. Comparative statics analysis and analysis of survey data have led to the conclusion that small-sized farms are likely to be more fragmented, and that fragmentation had a negative impact on crop productivity and increased family labour use and other money expenses. Policies which allow the... |
| Tipo: Journal Article |
Palavras-chave: Development economics; Land fragmentation; Land use and tenure; Production economics; Resource /Energy Economics and Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/118327 |
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| Karadas,Koksal; Birinci,Avni. |
| ABSTRACT The aim of this investigation was to determine risk factors affecting production of beekeeping farms in Igdir province of Turkey and to develop strategies in coping with these risks. Research was based on data collected through a questionnaire applied to 85 beekeeping farms registered to Igdir Beekeepers’ Union according to exact counting method. Factor analysis was applied to collected data to identify risk factors and risk management strategies. Factor analysis was conducted under principle component extraction method and VARIMAX rotation. A stepwise regression analysis was used to reveal the relationship between each of four strategy factors and eight risk factors. As risks in procuring labor occur, farmers are more likely to adopt modern... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apiculture; Approach; Factor analysis; Production economics; Uncertainty. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100702 |
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| Karadas,Koksal; Birinci,Avni. |
| ABSTRACT This study was conducted to compare predictive performances of different data-mining algorithms for determining factors influencing the average daily milk yield at dairy cattle enterprises of Ardahan province, located in the Eastern Anatolia region of Turkey. The algorithms employed in the present study were Classification and Regression Tree (CART), Chi-Square Automatic Interaction Detector (CHAID), Exhaustive Chi-Square Automatic Interaction Detector (Exhaustive CHAID), Multivariate Adaptive Regression Splines (MARS), and Multilayer Perceptron (MLP). The MARS algorithm outperformed the other algorithms in the study. Visual results of CART revealed that the culture-breed cows with a lactation length greater than 237.500 days had the highest milk... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milk yield; Production economics; Statistical model. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100106 |
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| Registros recuperados: 31 | |
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