Cycle length and crop coefficient curves Sample Clauses

Cycle length and crop coefficient curves. The effect of temperature increase (and relative GDD accumulation) on current and projected crop cycle length and corresponding crop coefficient curves is represented in the following graphs, and the following observations have to be highlighted: ‐ if varietal adaptation is not considered, an important reduction of the total growing cycle is predicted for all planting dates, because of the faster accumulation of the required GGD sum under “future” climate conditions (2050) (fig. 15‐16); ‐ if a late maturing variety will be used, the total crop cycle length (2050 late_var) is projected to remain relatively the same as for the current variety under “present” climate conditions (2000), especially for late planting dates (fig. 16); Growing Degree Days (°C) Growing Degree Days (°C) ‐ with respect to the four crop coefficient stages, a relative reduction is predicted in proportion to the corresponding increase in the cumulative GDD (lower during winter, higher during spring‐summer months), but with a greater effect in the case of early (February) rather than late (April) planting dates (fig. 15). 1500 1000 500 April_2050 April_2000 0 1 21 41 61 81 101 121 141 161 181 201 DAS 1,4 0,4 April_2050 0,2 April_2000 0 1 21 41 61 81 101 121 141 161 181 201 DAS 1500 1000 February2050 500 February2000 0 1 21 41 61 81 101 121 141 161 181 DAS 0,4 February2050 0,2 February2000 0 1 21 41 61 81 101 121 141 161 181 DAS Crop coefficient (Kc) Crop coefficient (Kc) Fig. 15 – Predicted cumulative GDD and corresponding Kc curves for tomato in Jordan river basin (Jordan) as affected by different planting dates and climate scenarios. Apr 1st Mar 15th 2050 late_var 2050 2000 Mar 1st Feb 15 th Feb 1st 50 100 Cycle length (days) 150 Planting date

Cycle length and crop coefficient curves. The effect of temperature increase (and relative GDD accumulation) on current and projected crop cycle length and corresponding crop coefficient curves is represented in the following graphs, and the following observations have to be highlighted: ‐ if varietal adaptation is not considered, an important reduction of the total growing cycle is predicted for all planting dates, because of the faster accumulation of the required GGD sum under “future” climate conditions (2050) (fig. 42‐43);