|
| << previous | next >> |
Journal description
All volumes of the corresponding journal
All issues of the corresponding volume
All articles of the corresponding issues
Details for article 122 of 164 found articles
| Title: |
Sampling for soil nitrogen changes in large areas of grazed pastures |
| Author: |
Vallis, I. |
| Appeared in: |
Communications in soil science and plant analysis |
| Paging: | Volume 4 (1973) nr. 2 pages 163-170 |
| Year: |
1973 |
| Contents: |
Lateral variation in soil N content was studied in five pastures to find the best method of sampling for precise estimates of changes in soil N content with time. Variation increased with sampling area up to, but not beyond, 1.2 - 2.4 ha. Consequently, the most efficient method of sampling for changes in N content was to repeatedly sample a fixed set of small sites. An allocation of 1-3 cores per site was shown to be optimum. The number of cores needed to measure a change in N content in a field with a probability of 0.8 that the 0.95 confidence limits of the mean change would be within ± 50 kg N ha-1 ranged from 150 to 1000. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 122 of 164 found articles
| << previous | next >> |