Interpretation of the phosphorous soil test for Alaska agricultural soils
dc.contributor.author | Michaelson, Gary J. | |
dc.contributor.author | Ping, Chien Lu | |
dc.date.accessioned | 2013-08-27T21:30:37Z | |
dc.date.available | 2013-08-27T21:30:37Z | |
dc.date.issued | 1989-04 | |
dc.identifier.uri | http://hdl.handle.net/11122/2161 | |
dc.description.abstract | Phosphorus (P) along with nitrogen (N) and potassium (K) comprise the three macronutrients most frequently added as fertilizer for growing plants. In Alaska soils, P is often the second most limiting nutrient after N. A proper supply of plant-available P is important for root development and plant growth. To supply P to growing crops, the soil not only must contain enough P, but it must be in a form which is available for utilization by the plant. The status of P in the soil has an important influence on fertilization practices. Agricultural soils of Alaska vary considerably, not only in their total content of P and its distribution (form it occurs in), but also in the characteristics for sorption or fixation of P (Ping and Michaelson, 1986). Forms of P in the soil will affect its availability. The P-sorption character of soils will affect P fertilizer reactions in the soil and thus influence the amount of P fertilizer necessary and carry-over effects of applied P. It is essential that P soil tests and their interpretation be tailored for soils with similar P reactions. A useful P soil test must be based on both correlation of test values to plant growth and to field calibration of soil test values with yield. | en_US |
dc.publisher | School of Agriculture and Land Resources Management, Agricultural and Forestry Experiment Station | en_US |
dc.title | Interpretation of the phosphorous soil test for Alaska agricultural soils | en_US |
dc.title.alternative | Circular 66 | |
dc.type | Technical Report | en_US |
refterms.dateFOA | 2020-01-24T13:36:38Z |