Sustainable Land Management for Mitigating Climate Change

XXV. Units and Conversions

Length							Area
1 inch		=	25.4 mm				1 in^2		=		645 mm^2
1 foot		=	0.3048 m				1 ft^2		=		0.0929 m^2
1 yard		=	0.9144 m				1 yd^2		=		0.8361 m^2
1 chain		=	20.12 m				1 acre		=		4047 m^2
1 mile		=	1.609 km						=		0.4047 ha
							1 mile^2		=		259.0 ha
									=		2.59 km^2
Volume							Mass
1 ft^3		=	0.02832 m^3				1 ton (US)		=		0.9072 ton (metric)
1 yd^3		=	0.7645 m^3				1 bushel of corn		=		56 lbs
1 gal (UK)		=	4.546 litres				1 cwt (hundredweight, short)		=		0.454
		=	0.004546 m^3				quintal		=		45.4 kg
1 gal (US)		=	3.785 litres				1 pound (lb)		=		0.454 kilogram (kg)
		=	0.003785 m^3				1 ounce (oz)		=		28.35 gram (g)
1 mile^3		=	4.166 km^3				1 ton (US)/acre		=		2.2417 Mg/ha
1 acre-ft		=	271,400 gal (UK)				1 gigaton		=		1 billion metric ton (1 Pg)
		=	1613 yd^3				I million ton		=		I terragram (1Tg)
		=	1233.5 m^3
1 mill gal (UK)		=	3.7 acre-ft
		=	4564 m^3
Flow
1 cusec (ft^3/second)	=			0.2832 m^3/sec		=		1.0194 hectare-centimeters/hour
						=		101.94 m^3/hr
1 mill gal (UK)/day	=			3.7 acre-ft/day		=		4564 m^3/d (cmd)
						=		1.867 cusec = 0.0531 m^3/sec
1 cusec for 24 hour	=			1.983 acre-ft		=		2447 m^2
1 acre-foot	=			0.1233 hectare-meter, ha-m		=		12.33 hectare-centimeters
1 acre-inch	=			0.01028 hectare-meter, ha-m
	=			1.028 hectare-centimeters		=		102.8 m^3
1 gal (US)/min	=			0.00227 hectare-centimeter/hour
	=			0.227 m^3/hr
Force						Energy and Power
1 Newton	=			10^5 dynes cm^-2		1 erg		=		10^-7 J
						1 watt		=		1 J sec^-1
						1 H.P.		=		746 watts

1^ Biochar is a charcoal produced from biomass and is largely inert, highly porous (hence good for drainage and microbial activity), can be used for soil improvement including C sequestration. Biochar is a key ingredient in the formation of anthropogenic Amazonian dark earth (soils).