Crop Data Base
Linked to the Irrigation Water Demand Model
IWD but also as a data base directly accessible as one of the OBJECT DATA BASES,
WaterWare includes a collection (146 as of R6.1) of CROP data sets.
The listing of crops can be sorted (ascending or descending) by:
these descriptive and classificatory data are augmented by a small graph that symabolizes
water requirements over the (calender) year, composed of growing period and overall (annual)
- Crop name;
- Group classification;
- Planting date (by month for the Northern hemisphere);
- CWR (average growing season crop water requirement)
The data set for a crop include in addition to the standard OBJECT HEADER
and META DATA records
- A basic hypertext description of the crop (the hypertext window includes buttons for authorised user to edit the
description text, and upload and integrate imagery in any HTML compatible format)
- Average, most common planting time (month, again assuming Northern hemisphere and a Mediterranean climate)
and average growing period (in days);
- Basic physiology: annual water requirements, the FAO Kc factor, and an average rooting depth
for an average adult plant;
- Economic basics: average yield in t.ha, production costs, market price (average, minimum and maximum range
for a recent reference year);
- Time series data:
the button TimeSeries leads to a separate editor and display page for time series data.
These are organized in ten intervalls covering the growing period specified on the main page.
For example, for a perennial spcies such as a tree, the period is 365 days, so each slor represents
1/10 of this period or 36.5 days;
for a fast growing seasonal vegetable, lika salad with 60 day growing period,
each slot would represent again 1/10, i.e., 6 days.
The four time series avalable include:
- CWR, physiological water demand, the represents the water used by a
plant under optimal environmental "stress-less" conditions, in mm/day.
- FAO Kc factor over time
- Drought tolerance (expressed as MAD: Management allowed Depletion (of soil moisture)
- Dynamic shading factor (0 = no shading, 1.0 = complete shading of the underlying soil surface).