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Increasing Irrigation Efficiency
Water Use and Management
Updated Crop Evapotranspiration (ET) & Salinity Management
Watermelon
Table 1
Watermelon heat units, NDVI, and Kc values classified by FAO-56 growth stages.
Stage | GDD (C-Day) | GDD (F-Day) | NDVI | Kc |
---|---|---|---|---|
INI | 0.074 | 0.305 | ||
INI/DEV | 412.7 | 774.8 | 0.197 | |
DEV/MID | 805.1 | 1481.2 | 0.667 | 1.091 |
MID/END | 1431.2 | 2608.1 | 0.667 | |
END | 1821.6 | 3310.9 | 0.398 |
GDD is based on minimum and maximum thresholds of 4.4 C (39.9 F) and 28 C (82.4 F), respectively.
![Figure 1. Eddy covariance system in watermelon field in the North Gila Irrigation and Drainage District.](/sites/desertagsolutions.org/files/styles/az_large/public/2024-06/watermelonFig1.png?itok=NCVwOuVf)
Figure 1
Eddy covariance system in watermelon field in the North Gila Irrigation and Drainage District.
![Figure 2. Surface soil salinity increases to both lettuce and watermelon crop grown in rotational sequence.](/sites/desertagsolutions.org/files/styles/az_large/public/2024-06/watermelonFig2.png?itok=7bt0YJGt)
Figure 2
Surface soil salinity increases to both lettuce and watermelon crop grown in rotational sequence.