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| Whan, Ian F.; Hammer, G.L.. |
| This paper develops a methodology for estimating the costs of delay of harvesting wheat and demonstrates the approach using data for Southern Queensland. Costs associated with delay in harvesting wheat stem from quality downgrading after rain on the mature crop, yield loss due to ageing and labour costs related to the delay period itself. The most difficult of these costs to predict is loss due to quality downgrading. This loss is hypothesized to depend on the probability of various rain related events given a range of harvest starting dates and harvest durations. A probability analysis was used to relate rainfall events and loss so that expected delay costs, given a range of harvesting durations and starting dates, could be specified. The variability of... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1985 |
URL: http://purl.umn.edu/12438 |
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| Kennedy, John O.S.; Whan, Ian F.; Jackson, R.; Dillon, John L.. |
| The consequences of carryover for the optimal application of fertilizer are considered using dynamic programming. The conclusions are relevant for the further problem of deciding how many grain crops to harvest from grain sorghum plants grown in a tropical environment. Dynamic programming is also used for solving this problem for the Ord River Valley, and takes account of the interrelations between season and crop cycle number. Data were obtained from investigations conducted in the area. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1973 |
URL: http://purl.umn.edu/22785 |
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