Abstract
This study was initiated to develop and assess the management of the application of animal waste and compost to an oat/corn rotation in Arizona. Unlike many Eastern states, Arizona uses nitrogen as the limiting nutrient in animal waste applications. In this project, nutrient analysis for nitrogen, phosphorus and electroconductivity were conducted on soil, manure/compost, and plant samples. There were three treatments replicated four times in this study. Treatment 1: inorganic nitrogen sources; Treatment 2: manure; Treatment 3: composted manure. All management decisions are made to maximize yield while assuring that the amount of nitrogen applied was equivalent to the nitrogen removed in the crop. In the first year, there was little or no difference in crop yields. In the second year, yield differences began to show. The soil nitrate-N content was remaining relatively low and equal between treatments. However soil phosphorus content has significantly increased in the manure and compost plots. According to the ruling, if the level of P becomes high enough, then P will become the limiting nutrient. Thus far, we have not reached that point; however, P levels are being monitored closely.
Original language | English (US) |
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Pages | 2847-2858 |
Number of pages | 12 |
State | Published - 2004 |
Event | ASAE Annual International Meeting 2004 - Ottawa, ON, Canada Duration: Aug 1 2004 → Aug 4 2004 |
Other
Other | ASAE Annual International Meeting 2004 |
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Country/Territory | Canada |
City | Ottawa, ON |
Period | 8/1/04 → 8/4/04 |
Keywords
- Animal waste
- Compost
- Nitrate
- Phosphorus
ASJC Scopus subject areas
- General Engineering