Table 2. Changes in the density of leafy spurge (shoots/m²) during 1951–1957 according to the intial density (Selleck et al. 1962).
| |
| |
|
Initial density |
Year |
Mean density |
|
|
|
|
|
1951 |
1952 |
1953 |
1954 |
1955 |
1956 |
1957 |
|
| |
|
1–35 shoots/m² in 1951 |
19.1 |
38.0 |
56.9 |
69.4 |
109.3 |
121.2 |
144.2 |
79.7 |
|
36–99 shoots/m² in 1951 |
61.5 |
84.5 |
102.0 |
112.0 |
162.9 |
179.9 |
199.4 |
128.9 |
|
≥ 100 shoots/m² in 1951 |
122.5 |
125.5 |
141.3 |
156.7 |
202.8 |
241.6 |
207.7 |
171.1 |
|
| |
Note: The study site was divided into quadrats that were classified according to the intial density, and the density was determined annually for each density class.
|