大田地表灌溉
3.2.4 Determination of Crop Factors 作物因子的测定
Per crop, four crop factors have to be determined: one crop factor for each of the four growth stages. Table 8 indicates per crop the Kc values for each of the four growth stages.
对于每种作物，四个作物系数必须确定：一个作物系数用于四个生长阶段中的每一个。 表 8 显示了每株作物四个生长阶段中每一个的 Kc 值。
Table 8 VALUES OF THE CROP FACTOR (Kc) FOR VARIOUS CROPS AND GROWTH STAGES
表 8 各种作物和生长阶段的作物因子 (Kc) 值
Crop 作物 | 初期 | 作物生长期 | 中期 | 晚期 |
Barley/Oats/Wheat | 0.35 | 0.75 | 1.15 | 0.45 |
Bean, green | 0.35 | 0.70 | 1.10 | 0.90 |
Bean, dry | 0.35 | 0.70 | 1.10 | 0.30 |
Cabbage/Carrot | 0.45 | 0.75 | 1.05 | 0.90 |
Cotton/Flax | 0.45 | 0.75 | 1.15 | 0.75 |
Cucumber/Squash | 0.45 | 0.70 | 0.90 | 0.75 |
Eggplant/Tomato | 0.45 | 0.75 | 1.15 | 0.80 |
Grain/small | 0.35 | 0.75 | 1.10 | 0.65 |
Lentil/Pulses | 0.45 | 0.75 | 1.10 | 0.50 |
Lettuce/Spinach | 0.45 | 0.60 | 1.00 | 0.90 |
Maize, sweet | 0.40 | 0.80 | 1.15 | 1.00 |
Maize, grain | 0.40 | 0.80 | 1.15 | 0.70 |
Melon | 0.45 | 0.75 | 1.00 | 0.75 |
Millet | 0.35 | 0.70 | 1.10 | 0.65 |
Onion, green | 0.50 | 0.70 | 1.00 | 1.00 |
Onion, dry | 0.50 | 0.75 | 1.05 | 0.85 |
Peanut/Groundnut | 0.45 | 0.75 | 1.05 | 0.70 |
Pea, fresh | 0.45 | 0.80 | 1.15 | 1.05 |
Pepper, fresh | 0.35 | 0.70 | 1.05 | 0.90 |
Potato | 0.45 | 0.75 | 1.15 | 0.85 |
Radish | 0.45 | 0.60 | 0.90 | 0.90 |
Sorghum | 0.35 | 0.75 | 1.10 | 0.65 |
Soybean | 0.35 | 0.75 | 1.10 | 0.60 |
Sugarbeet | 0.45 | 0.80 | 1.15 | 0.80 |
Sunflower | 0.35 | 0.75 | 1.15 | 0.55 |
Tobacco | 0.35 | 0.75 | 1.10 | 0.90 |
