[[TOC]]

In LPJmL 13 different crop functional types (CFTs) can be simulated (1-13) including a group of other annual and perennial crops. The physical cropping area of each of them together with the physical area of managed grasslands and bio-energy trees and grass (latter two currently set to zero) can be prescribed in LPJmL simulations using the land-use input file[^1].

The following list provides the name of each crop functional type as in LPJmL, in brackets the crops contained in this group (cultivated area according to land-use input file) and after the semicolon the name of the representative crop which defines the crop parameters used to simulate crop growth and development.

1. Temperate cereals (wheat, rye, barley; wheat)
2. Rice (paddy rice; rice)
3. Maize (maize for food; maize)
4. Tropical cereals (millet, sorghum; millet)
5. Pulses (pulses; field peas)
6. Temperate roots (sugar beet; sugar beet)
7. Tropical roots (cassava; cassava)
8. Sunflower (sunflower; sunflower)
9. Soybean (soybean; soybean)
10. Groundnuts (groundnuts; groundnuts)
11. Rapeseed (rapeseed; rapeseed)
12. Sugarcane (sugarcane: sugarcane)
13. others (potatoes, oil palm, citrus, date palm, grapes/vine, cotton, cocoa, coffee, other perennial crops, other annual crops; managed grassland)
14. managed grasslands (pastures; managed grasslands)
15. bio-energy grass
16. bio-energy tree

The cropping area for each of the CFTs are taken from MIRCA2000[^2] which is partly a product of the crop-specific area[^3]. Monfreda et al. defined 175 crops and this number was reduced to 26 in MIRCA2000. Therefore e. g. the group pulses consist of 11 individual crops.

MIRCA2000, Monfreda et al. 2008 and also e.g. FAOStat reports harvested areas while in LPJmL physical/sowing area is prescribed. Multiple cropping areas are largely neglected in the land-use input file because crop area cannot exceed grid cell area in LPJmL simulations.

Table 1: Crop Specific Harvested Area Around the Year 2000 (Table 4 in Portmann et al. 2010).
Total, rainfed, and irrigated harvested crop area as area (km²) and as percentage of total harvested area (%). Energy content from the FAO Food Balance Sheet Handbook Dry matter content from Wirsenius 2000 (available at /p/projects/landuse/useful_papers/wirsenius_2000_human_use_of_land_and_organic_materials_phd_thesis.pdf appendix table A1.II (page 272 ff, note that the table here only contains values for currently implemented crops)

Crop Name	Total Area Harvested	Rainfed Area Harvested	Irrigated Area Harvested	Percentage Irrigated	Energy content (kcal/kg “as purchased”)	Dry matter content [%]
Wheat	2,145,606	1,479,284	666,322	31.1	3340	88
Maize	1,515,227	1,216,220	299,007	19.7	3560	88
Rice	1,657,216	626,018	1,031,197	62.2	2800	87
Barley	551,268	504,810	46,458	8.4	NA	NA
Rye	103,999	99,576	4,423	4.3	NA	NA
Millet	336,386	318,949	17,437	5.2	3400	88
Sorghum	401,519	367,154	34,366	8.6	NA	NA
Soybeans	748,108	687,782	60,327	8.1	3350	91
Sunflower	207,578	194,891	12,687	6.1	3080	93
Potatoes	197,086	159,631	37,455	19.0	670	NA
Cassava	154,536	154,424	112	0.1	1090	35
Sugarcane	209,460	107,570	101,890	48.6	300	27
Sugar beet	61,932	46,192	15,740	25.4	700	24
Oil palm	96,514	96,404	110	0.1	NA	NA
Rapeseed	246,359	212,321	34,038	13.8	4940	92
Groundnuts	227,207	190,449	36,758	16.2	4140	94
Pulses	671,202	616,644	54,558	8.1	3460	90
Citrus	74,820	39,194	35,627	47.6	NA	NA
Date palm	9,184	1,950	7,234	78.8	NA	NA
Grapes	71,417	54,150	17,267	24.2	NA	NA
Cotton	331,516	168,994	162,522	49.0	NA	NA
Cocoa	67,538	67,413	125	0.2	NA	NA
Coffee	101,622	99,883	1,739	1.7	NA	NA
Other perennial	731,402	602,872	128,530	17.6	NA	NA
Fodder grasses	1,046,725	929,885	116,840	11.2	NA	NA
Other annual	1,087,904	886,517	201,387	18.5	NA	NA
Total	13,053,334	9,929,175	3,124,159	23.9

Please note that these values are not necessarily the same as in the land-use input file used in LPJmL as this rather contains the physical crop area and not the harvested crop area like here in Table 1.

https://github.com/PIK-LPJmL/LPJmL/blob/master/par/pft.par

Varieties, Parameter

[^1]: Fader, M., Rost, S., Müller, C., Bondeau, A.,Gerten, D., 2010. Virtual water content of temperate cereals and maize: Present and potential future patterns. Journal of Hydrology. 384, 218-231.

[^2]: Portmann, F.T., Siebert, S.,Döll, P., 2010. MIRCA2000 - Global monthly irrigated and rainfed crop areas around the year 2000: A new high-resolution data set for agricultural and hydrological modeling. Global Biogeochemical Cycles. 24, 1-24.

[^3]: Monfreda, C., Ramankutty, N.,Foley, J.A., 2008. Farming the planet: 2. Geographic distribution of crop areas, yields, physiological types, and net primary production in the year 2000. Global Biogeochemical Cycles. 22, -.