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close this bookAmaranth to Zai Holes, Ideas for Growing Food under Difficult Conditions (ECHO; 1996; 397 pages)
View the documentOther ECHO publications
View the documentAbout this book
View the documentAcknowledgements
Open this folder and view contents1: Basics of agricultural development
Open this folder and view contents2: Vegetables and small fruits in the tropics
Open this folder and view contents3: Staple crops
Open this folder and view contents4: Multipurpose trees
Open this folder and view contents5: Farming systems and gardening techniques
Open this folder and view contents6: Soil health and plant nutrition
Open this folder and view contents7: Water resources
Open this folder and view contents8: Plant protection and pest control
Open this folder and view contents9: Domestic animals
Open this folder and view contents10: Food science
Open this folder and view contents11: Human health care
Open this folder and view contents12: Seeds and germplasm
Open this folder and view contents13: Energy and technologies
Open this folder and view contents14: From farm to market
Open this folder and view contents15: Training and missionary resources
Open this folder and view contents16: Oils
Open this folder and view contents17: Above-ground (urban) gardens
View the document18: What is ECHO?
View the documentAdditional ECHO publications
Open this folder and view contentsECHO development notes - issue 52
Open this folder and view contentsECHO development notes: issue 53
close this folder28 additional technical notes about tropical agriculture
View the documentA few alternate seed sources that we commonly use
View the documentAmaranth - grain and vegetable
Open this folder and view contentsArid region farming primer
View the documentCitrus propagation and rootstocks
Open this folder and view contentsCucurbit seeds
close this folderDry farming
View the documentFundamental principles
View the documentRequirements
View the documentI. Increase water absorption
View the documentII. Reducing the loss of soil moisture
View the documentIII. Dry farming practices
View the documentMuscovy ducks for png villages
View the documentFruit crops
View the documentFruit vegetables
View the documentGrain crops
View the documentGround covers and green manures
View the documentGreen manure crops
View the documentIndustrial crops
View the documentThe lablab bean as green manure
View the documentLeafy vegetables
View the documentLeguminous vegetables
View the documentThe moringa tree
View the documentRecipes to learn to eat moringa
View the documentMiscellaneous vegetables
View the documentThe poor man's plow
View the documentPulses (grain legumes)
View the documentRabbit raising in the tropics
View the documentLetter from fremont regier, mennonite central committee, Botswana (and earlier in Zaire)
View the documentRoots and tubers
View the documentSunnhemp as a green manure
View the documentThe sweet potato
View the documentTropical pasture and feed crops
View the documentThe velvet bean as green manure
Open this folder and view contentsPrinciples of agroforestry
Open this folder and view contentsGood nutrition on the small farm
 

Requirements

1. Rainfall must be greater than 10 inches per year (250mm).
2. Wind and heat must not cause excessive evaporation at critical stages of plant growth.
3. Soil should be deep (preferably 10 feet - 3 meters) with no clay, sand, or gravel seams to interfere with capillary movement of water. The minimum feasible soil depth is 18 inches (450mm) but water storage capability and drought resistance increases with increasing soil depth.

To obtain maximum storage of moisture under any rainfall condition, the soil must absorb as much water as possible when it rains and losses by evaporation or transpiration must be kept to a minimum.

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