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Details van artikel 107 van 164 gevonden artikelen
| Titel: |
NO3-N Soil Test—approaches to use and interpretation |
| Auteur: |
Ward, Raymond C. |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 2 (1971) nr. 2 pagina's 61-71 |
| Jaar: |
1971 |
| Inhoud: |
Nitrate-nitrogen (NO3-N) soil tests have been instituted by several Great Plains States to aid in making nitrogen fertilizer recommendations. The NO3-N soil test is useful in the Great Plains because climatic conditions are such that NO3-N leaching is low and soil rooting depths are great. Essentially four basic approaches to the use and interpretation of the NO3-N soil test have been developed and are discussed. They are: (1) total amount of NO3-N extracted from a two foot soil profile is available to the growing crop; (2) only a portion of the extractable NO3-N is available to the growing crop; (3) other mineral nitrogen, such as NH4-N, is just as available to the growing crop and (4) some nitrogen becomes available from the soil organic matter. The NO3-N soil test requires that deep samples (two feet or more) be taken and that they are air-dried as rapidly as possible. Late fall or early spring soil samples are necessary for interpretation of the NO3-N soil test. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 107 van 164 gevonden artikelen
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