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| Bjorneberg, D.L.; King, K.. |
| Water use efficiency is a term often applied to irrigated conditions to determine the amount of applied water that is used by crops. Water use in irrigated watersheds can be managed by adjusting irrigation diversions to meet irrigation needs. Precipitation is often the only source of water input in many watersheds, and its rate and timing cannot be controlled. Excess water is often drained from the watershed through surface or subsurface drains to provide suitable conditions for crop growth. The objective of this paper is to compare water balances for the irrigated Upper Snake-Rock (USR) watershed in southern Idaho and the subsurface drained Upper Big Walnut Creek (UBWC) watershed in central Ohio. Irrigation water diverted from the Snake River supplied 80%... |
| Tipo: Article |
Palavras-chave: Site-specific irrigation. |
| Ano: 2012 |
URL: http://eprints.nwisrl.ars.usda.gov/1468/1/1433.pdf |
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| Nachimuthu, G.; King, K.; Kristiansen, P.; Lockwood, P.; Guppy, C.. |
| In order to develop a method of measuring the level of microbial activity in soil that is suitable for use by farmers, land managers, and other non-scientists, a simple method for determining soil microbial activity was evaluated and compared with two standard techniques. Soils sampled from vegetable farms in south east Queensland were incubated in the laboratory under controlled moisture and temperature conditions. Three methods were used to measure soil microbial activity, a respirometry method and two methods using the cotton strip assay (CSA) technique (image analysis and tensometer). The standard CSA method measured loss of tensile strength over a 35 day incubation period of buried cotton strips using a tensometer. The new CSA technique measured the... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Research methodology and philosophy. |
| Ano: 2008 |
URL: http://orgprints.org/14040/4/14040.pdf |
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