The economic effect of applying phosphorus at planting of durum wheat is directly correlated to the phosphorus that is available to the plants from the soil. In 1998 a study was done on a field with a bicarbonate soluble phosphorus level of 4.8 ppm, an a sizeable return on the phosphorous fertilizer investment was seen. In 1999 the test field had a phosphorous level of 13.0 ppm and as the University guidelines indicated, returns on phosphoroud expenditures were small. Negative returns were seen with barley and an increase of $61/ac was seen with 400 pounds of 16-20-0 on wheat.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/205157 |
| Date | 05 1900 |
| Creators | Clark, L. J., Carpenter, E. W. |
| Contributors | Ottman, Michael J. |
| Publisher | College of Agriculture, University of Arizona (Tucson, AZ) |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Article |
| Relation | AZ1147, Series P-119 |
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