Table 5

Table 19 - Climate, soil and terrain constraints for rain-fed crop production - world totals

Constraints				LGP 0 days CC	LGP 1-60 CC	LGP 60-119 C	LGP 120-179	LGP 180-269	LGP 270-365	LGP 365+ C	Totals
Constraints				LGP 0 days CC	LGP 1-60 CC	LGP 60-119 C	LGP 120-179	LGP 180-269	LGP 270-365	LGP 365+ C	(1000 ha)	(%)
Temperature	LGP_t=5> 180			2365974	987840	1011265	984304	2201989	2109618	267971	9928961	74.1
	LGP_t=5< 180		C	66680	124305	181110	1331246	0	0	0	1703341	12.7
	LGP_t=5< 120		CC	319916	257011	1190287	0	0	0	0	1767214	13.2
Terrain slopes	0 - 8%			1723756	759835	1072543	1165779	1127350	1235215	160789	7245267	54.1
	8 - 16%		C	488998	245169	428985	454332	409426	317181	32978	2377069	17.7
	16 - 30%		C	354590	195950	480417	419477	395591	313609	42034	2201668	16.4
	> 30%		CC	185226	168201	400716	275962	269622	243612	32169	1575508	11.8
Soil depth	Deep			1597192	952499	1584815	1776020	1833679	1857481	242245	9843931	73.5
	Medium		C	120784	28001	30231	27489	20835	9352	3572	240264	1.8
	Shallow		CC	420996	225271	654258	449361	294186	206237	20476	2270785	16.9
Soil fertility	High			1264607	631996	741979	600953	598856	310539	20287	4169217	31.1
	Medium		C	182938	133708	314328	611371	809819	827731	125381	3005276	22.4
	Low		CC	691428	440067	1212997	1040545	740025	934800	120625	5180487	38.7
Soil drainage	Good			2104748	1130650	1967228	1970950	1863711	1787142	232820	11057249	82.5
Soil drainage	Poor		CC	34224	75121	302075	281920	284989	285927	33473	1297729	9.7
Soil texture	Medium/fine			1111749	795694	1596659	1620648	1596983	1753693	247791	8723217	65.1
	Sandy/stony		CC	307615	135007	244729	179511	124555	73504	5877	1070798	8.0
	Cracking clay		C	719608	275071	427915	452711	427162	245873	12625	2560965	19.1
Soil chemical constraints	None			1906239	957865	2102300	2160431	2092614	2039876	263938	11523263	86.0
Soil chemical constraints	Salinity / Sodicity / Gypsum		CC	232734	247906	167004	92439	56086	33193	2355	831717	6.2
Miscellaneous land units			CC	613597	163384	113358	62680	53289	36548	1678	1044534	7.8
Total without constraints				0	0	0	134569	226384	108420	0	469373	3.5
Total with moderate constraints			C	0	0	527936	541771	672129	617771	103225	2462832	18.4
Total with severe constraints			CC	2752570	1369155	1854726	1639210	1303476	1383428	164746	10467311	78.1
Total		(1000 ha)		2752570	1369155	2382661	2315550	2201989	2109618	267971	13399514	100.0
Total		(%)		20.5	10.2	17.8	17.3	16.4	15.7	2.0	100.0

C	Moderate or slight constraint
CC	Severe constraint

Notes: Individual constraints are non-additive, that is, they may overlap.

In areas with 365 days temperature growing periods, LGP 0 days is referred to as Hyper-arid moisture regime, LGP 1-60 days as Arid, LGP 60-119 days as Dry Semi-arid LGP 120-179 days as Moist Semi-arid, LGP 180-269 as Sub-humid, LGP 270-365 days as Humid, and LGP 365+ as Per-humid regime.