photographic scale was evaluated by obtaining data at three scales : large, 1:3,000 (Figs. 5 and 6); intermediate, 1:20,000 (Fig.7); and small, 1:120,000 (Fig.8.)
photographs were then examined and the three scales compared for detection of phymatotrichum root rot in cotton
photographic scale was evaluated by obtaining data at three scales : large, 1:3,000 (Figs. 5 and 6); intermediate, 1:20,000 (Fig.7); and small, 1:120,000 (Fig.8.)photographs were then examined and the three scales compared for detection of phymatotrichum root rot in cotton
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