43
was not permitted to be negative, it was set to zero
when this condition occurred. No dry weight was
accumulated for seven days after planting. This time
period was reserved for seed germination and seedling
emergence.
C.) Results
The linear relationship between leaf area and leaf
dry-matter (Fig. 1) was highly correlated (r= 0.97).
The dry-matter accumulation of stems over time was also
well (r=0.89) described by a straight line (Fig. 2).
The dry-matter accumulation of seeds over time was
described by a cubic equation with an associated r =
0.94 (Fig. 3). The dry-matter accumulation of pods over
time was described by a quadratic equation with an r =
0.89 (Fig. 4). The dry-matter accumulation over time of
petioles and leaves was described by separate cubic
equations with r = 0.87 for petiole (Fig. 5) and r =
0.89 for leaf dry-matter accumulation over time (Fig.
6). The dry-matter accumulation for whole plants over
time is presented in Fig. 7, where a linear equation
with an r = 0.89 described the response. Values of r =
0.48, 0.61, 0.72 corresponded to P = 0.05, 0.01, 0.001
for 15 degrees of freedom (42).