Add crop preferences for agriculture

Author: jochenklar

protocol/04.output.md

@@ -69,6 +69,33 @@ Many variables are defined per area (unit m-2). Typically, and unless otherwise
 
     Cumulative growing season variables such as, e.g., actual evapotranspiration or precipitation are to be accumulated over the growing season. The first season in the file (level=0) is then the first complete growing season of the time period provided by the input data without any assumed spin-up data, which equates to the growing season with the first planting after this date. To ensure that data can be matched to individual years in post-processing, it is essential to also provide the actual planting dates (as day of the year), actual planting years (year), anthesis dates (as day of the year), year of anthesis (year), maturity dates (day of the year), and year of maturity (year). This procedure is identical to the GGCMI convention (Elliott et al., 2015, <https://doi.org/10.5194/gmd-8-261-2015>).
 
+::: show simulation_round=ISIMIP3b sector=agriculture
+
+    #### Special crop instructions for ISIMIP3b Group3
+
+    For those models that require land use information as an input, the columns **Pref 1** to **Pref 4** indicate, in decreasing order of preference, what crops should actually be planted as a place holder (the corresponding fertilization, manure, and crop calendar information is to be used).
+
+    Table 4.10: Crop categories in the ISIMIP3b Group3 LUH2 land use input.
+    {: .caption}
+
+    | Crop category in LU file | Pref 1                      | Pref 2              | Pref 3            | Pref 4                 |
+    | ------------------------ | --------------------------- | ------------------- | ----------------- | ---------------------- |
+    | c3per                    | **mgr** (Managed grassland) |                     |                   | **swh** (Spring wheat) |
+    | c4per                    | **sgc** (Sugar cane)        | **sor** (Sorghum)   | **mil** (Millet)  | **mai** (Maize)        |
+    | maize                    | **mai** (Maize)             |                     |                   |                        |
+    | oil_crops_groundnut      | **nut** (Groundnut)         | **soy** (Soybean)   | **bea** (Beans)   | **swh** (Spring wheat) |
+    | oil_crops_rapeseed       | **rap** (Rapeseed)          | **sun** (Sunflower) |                   | **swh** (Spring wheat) |
+    | oil_crops_soybean        | **soy** (Soybean)           | **bea** (Beans)     | **pea** (Peas)    | **swh** (Spring wheat) |
+    | oil_crops_sunflower      | **sun** (Sunflower)         | **rap** (Rapeseed)  |                   | **swh** (Spring wheat) |
+    | others_c3ann             | **swh** (Spring wheat)      |                     |                   |                        |
+    | others_c3nfx             | **bea** (Beans)             | **pea** (Peas)      | **soy** (Soybean) | **swh** (Spring wheat) |
+    | pulses                   | **pea** (Peas)              | **bea** (Beans)     | **soy** (Soybean) | **swh** (Spring wheat) |
+    | rice                     | **ri1** (Rice1)             |                     |                   | **swh** (Spring wheat) |
+    | temperate_cereals        | **swh** (Spring wheat)      |                     |                   |                        |
+    | temperate_roots          | **sgb** (Sugar beet)        | **pot** (Potato)    |                   | **swh** (Spring wheat) |
+    | tropical_cereals         | **sor** (Sorghum)           | **mil** (Millet)    |                   | **mai** (Maize)        |
+    | tropical_roots           | **cas** (Cassava)           |                     |                   | **swh** (Spring wheat) |
+
 ::: show sector=biomes,fire,permafrost,peat
 
     #### Information about PFT-specific outputs