5Center PivotGood for sloped surfaces that aren’t possible with surface methodsStill has the necessity of surface drainageThe common ¼-mile system irrigates 130 acresIt is a towable systemGood for crops such as soy beans
7Drip Sprinklers are about 75% efficient while these are 90% or higher Easy to installEasy to designInexpensiveReduces plant disease levels associated with high levels of moistureWorks by applying water slowly directly to soil (with small droplets of water)Water soaks into soil before it can be evaporated outOnly applied at plants roots (which is where they need it)
9Flood “Low-tech" method of irrigating crops Basically, collect water in a bucket and pour it onto the fieldsStill one of the most popular methods of crop irrigationWater is pumped or brought to the fields and is allowed to flow along the ground among the cropsThis method is simple and cheap, and is widely used by societies in less developed parts of the world as well as in the U.S.About one-half of the water used ends up not getting to the cropsTraditional flood irrigation can mean a lot of wasted water
11FurrowThe same thing as flood but instead of cover the entire soil surface, a a partial surface flooding method of irrigationNormally used with clean-tilled crops where water is applied in furrows or rows of sufficient capacity to contain the designed irrigation system”
13GravityIrrigation in which the water is not pumped but flows and is distributed by gravityWater is conveyed in ditches, then released and allowed to spread over the areaThe drawback here is that the water is not evenly distributedThis system is not very suitable for tree and shrub crops.
15RotationHas been implemented to counter water-shortage problem
16SprinklerA method of applying irrigation water which is similar to rainfallWater is distributed through a system of pipes usually by pumpingIt is then sprayed into the air and irrigated entire soil surface through spray heads so that it breaks up into small water drops which fall to the groundSprinklers provide efficient coverage for small to large areas and are suitable for use on all types of propertiesIt is also adaptable to nearly all irrigable soils since sprinklers are available in a wide range of discharge capacity
18Subirrigation Also known as seepage irrigation A method of irrigation where water is delivered to the plant root zone from below the soil surface and absorbed upwardsThe excess may be collected for reuseSubirrigation is used in growing field crops such as tomatoes, peppers, and sugar caneUsed in areas with high water tables such as Florida and in commercial greenhouse operationsThree basic types of subirrigation system are in general use for potted plants in greenhouses:ebb-and-flow: bench-mounted enclosures holding pots are filled and then drainedtrough: water is flowed through bench-mounted, slightly sloping enclosures containing potsflooded floor: special sloped concrete flooring is flooded and drained
20Traveling GunSprinkler irrigation system consisting of a single large nozzle that rotates and is self-propelleThe name refers to the fact that the base is on wheels and can be moved by the irrigator or affixed to a guide wireConsists of a high capacity sprinkler mounted on a chassis to which a flexible hose is connected (usually 3 to 5 inches in diameter and up to 1320 feet long)The traveler is pulled along selected travel lanes by a cable or the hose wrapping on a rotating reel.The reel can be powered by a water turbine, water piston, or engine driveThe cable reel pulls the traveler through the field in a straight line.Adapted to irregularly shaped fieldsThe costs are moderate and require less labor than other methodsRequire high operating pressures and high power pumping units.Alleyways are required in the crop.Wind seriously affects the distribution pattern.
22Supplemental irrigation (SI) Highly efficient practiceGreat potential for increasing agricultural production and improving the dry rainfed areasIn the drier environments most of the rainwater is lost by evaporationThe rainwater productivity is extremely lowWater harvesting can improve agriculture by directing and concentrating rainwater through runoff to the plants and other beneficial usesOver 50% of lost water can be recovered at a very little costEnvironmental benefits of this practice are far more important than increasing agricultural water productivity.
24SurfaceSystems apply water rapidly to a level or nearly level area enclosed by dikesAccurate land leveling makes this system much more efficient and effectiveThis system is used extensively in the cranberry bogs for:frost controlfreeze protectionbog managementirrigation.Water is retained at a uniform depth until it has been:taken into the soilhas served its purpose of preventing freezing or frost damagethe water harvesting is complete
26U.S./International Programs for the Promotion of Soil Conservation -The Food Security Act of 1985-The Conservation Reserve Program-Federal Agricultural Improvement and Reform Act (“freedom to farm act”)Environmental Quality Incentive ProgramNatural Resources Conservation Foundation
27The Food Security Act of 1985- Contains provisions designed to discourage the conversion of wetlands into non-wetland areasThese provision are commonly referred to as the "Swampbuster" provisionsDenied Federal farm program benefits to producers who converted wetlands after December 23, 1985The Food, Agriculture, Conservation, and Trade Act of 1990 strengthened Swampbuster by making violators ineligible for farm program benefits for that year and subsequent yearsCreated a system for inadvertent violations allowing farmers to regain lost Federal benefits if they restore converted wetlands
28The Conservation Reserve Program The Conservation Reserve Program (CRP)Provides technical and financial assistance to eligible farmers and ranchers to address soil, water, and related natural resource concerns on their lands in an environmentally beneficial and cost-effective mannerProvides assistance to farmers and ranchers in complying with Federal, State, and tribal environmental laws, and encourages environmental enhancementFunded through the Commodity Credit Corporation (CCC)Provides technical land eligibility determinations, conservation planning and practice implementationReduces soil erosionprotects the Nation's ability to produce food and fiberreduces sedimentation in streams and lakesimproves water quality, establishes wildlife habitatenhances forest and wetland resourcesencourages farmers to convert highly erodible to vegetative coverFarmers receive an annual rental payment for the term of the multi-year contract
29-Federal Agricultural Improvement and Reform Act (“freedom to farm act”) revises and simplifies direct payment programs for crops and eliminates milk price supports through direct government purchasesremoved the link between income support payments and farm prices.It authorized 7-year production flexibility contract payments that provided participating producers with fixed government payments independent of current farm prices and productionspecified the total amount of money to be made available through contract payments under production flexibility contractsThe law increased planting flexibility by allowing participants to plant 100% of their total contract acreage to any crop, except with limitations on fruits and vegetables
30The Environmental Quality Incentives Program (EQIP) reauthorized in the Farm Security and Rural Investment Act of 2002 (Farm Bill)provides a voluntary conservation program for farmers and ranchers that promotes agricultural production and environmental quality as compatible national goalsEQIP offers financial and technical help to assist eligible participants install or implement structural and management practices on eligible agricultural land
31Natural Resources Conservation Foundation (NNRCF) a nonprofit private organization established by the 1996 farm billpromotes and funds innovative solutions to conservation problems through effective partnershipsThe Foundation can accept gifts and raise moneyThe NNRCF will conduct research, undertake educational activities, support demonstration projects, and make grants to state and local governments and nonprofit organizationsSimilar foundations have been created for several other natural resource areas.
35Soil DegradationSoil degradation occurs where our activities (either directly or indirectly) cause it to become less vigorous or less healthy.The ultimate degradation is the removal or loss of its physical components.
37Soil ErosionDegradation is not the same as soil erosion, which is when the soil is washed or blown away by water or wind.Soil erosion is common when trees are cut down, and then it rains, so the soil is moved somewhere else (sometimes to the sea/ocean/river).Trees and their root systems keep the soil in place and thus prevent soil erosion.
38Sheet Erosion Sheet erosion commonly occurs on recently plowed fields or on other sites havingpoorly consolidated soilmaterial with scantvegetative cover.
39Rill ErosionThe formation of numerous, closely spaced rills due to the uneven removal of surface soil by streamlets of running water. Also knownas rilling; rill wash;rillwork.
40Gully Erosion Gully erosion is the removal of soil along drainage lines by surfacewater runoff.Once started,gullies will continue tomove by headward erosionor by slumping of the sidewalls unless steps are takento stabilise the disturbance.
41Conventional TillageFull width tillage which disturbs all of the soil surface and is performed prior to and/or during planting.There is less than 15 percent residue cover after planting.Generally involves ploughing or intensive (numerous) tillage trips.Weed control is accomplished with crop protection products and/or row cultivation.
43Soil Erosion as a Global Problem Soil erosion remains the world's biggest environmental problem, threatening both developed and developing countries, according to sources at the 12th International Soil Conservation Organization (ISCO) Conference, which opened Monday in Beijing.Sources at the conference said that 65 percent of the soil on earth display degradation phenomena, such as erosion, desertification and salinization.
44Desertificationthe extreme deterioration of land in arid and dry sub-humid areas due to loss of vegetation and soil moisture; desertification results chiefly from man-made activities and influenced by climatic variations.
45The Dust Bowl (The Dirty 30’s) Period of severe dust stormsCaused ecological and agricultural damageCaused bysevere droughtAlso caused by lackof crop-rotation andfallow fields
46International Whaling Comission - Founded 1946, in Washington D.C.- Purpose is to govern the conduct of whaling throughout the world- Responsibilities include:- providing complete protection for certain species- designate specific areas as whale sanctuaries- set limits on the numbers and size of whales which may be taken- decides open and closed seasons for whaling- prohibits the capture of suckling calves and females accompanied by suckling calves
47Chico Mendes Rubber Trapper in Brazil’s Amazon Region In the 1980’s became politically active in protecting the rights of Rubber Trappers against the invasion of cattle ranchersFought to stop the burning and logging of the Amazon RainforestCaught the attention of Environmentalists around the world, but was murdered in 1988 by ranchers who opposed him
48By Cameron Miller, Alex Bruno, Luc Shay and Brendan Weyhe SoilBy Cameron Miller, Alex Bruno, Luc Shay and Brendan Weyhe
49What is Soil?- Soil is a complex plant-supporting system consisting of disintegrated rock, organic matter, water, gases, nutrients, and microorganisms.Soil is a renewable resource, it renews itself over a long period of time.Soil is the foundation for agriculture, it is vital forestry, and for functioning the earth’s natural systems.
50What is Soil?By Volume, soil consists of about half mineral matter, and up to five percent organic matter, and the remainder consists of pore space taken up by air or waterOrganic matter in soil includes both living and dead microorganisms, as well as decaying material derived from plants and animals.
51What is Soil?As well as supporting plant growth, soil also provides a habitat for animals such as earthworms, insects, mites, millipedes, centipedes, nematodes, sow bugs, and burrowing mammals, amphibians, and reptiles.Soil contains millions of bacteria, fungi, algae, and protists.Soil is actually an ecosystem in itself.
52How does soil form? Soil formation is a slow and complex process. It begins with Parent material as a base, which can consist of lava or volcanic ash, rock and sediment deposited by glaciers, wind blown dunes, sediments deposited by rivers, lakes, or oceans, or bedrock.The processes most responsible for soil formation are weathering, erosion, and the deposition/decomposition of organic matter.
53How does soil form?Weathering describes the physical, chemical, and biological processes that break down rocks and minerals, turning large particles into small particles.
54How does soil form?Physical or mechanical weathering breaks down rock. Two examples of Physical weathering are wind and rain.Chemical Weathering results when water or other substances chemically interact with the parent material. Chemical weathering occurs most with warm and wet conditions.Biological Weathering occurs when living things break down parent material, for example lichens may produce acid that weathers rock.
55How does soil form? Weathering is just one process of soil formation. Another process often involved is erosion.Erosion is the dislodging and movement of soil from one area to another.Erosion can both bring new soil to depleted areas, or deplete soil from rich areas.
56The Horizons of a basic soil profile Soil consists of different layers known as horizons.The distinct horizons as a whole make up a soil profile.There are typically six major horizons in a soil profile (O, A, E, B, C, and R).Although few soil profiles contain all six horizons.
57The horizons of a basic soil profile One of the most important horizons for agriculture and ecosystems is topsoil.Topsoil is mostly inorganic mineral, with organic matter mixed in.Topsoil is the most nutritive horizon for plants.It is also home to most of the living organisms contained in soil.
58Soils by BiomeThe regional differences in soil traits affect agriculture.For example the soil in tropical rainforests is very low in nutrition, where soil in temperate grasslands is high in nutrition.Factors such as percepitation and temperature affect the richness of soil.
59Soil CharacteristicsThere are four main characteristics of soil: Color, Texture, structure, and pH.
60Soil CharacteristicsSoil Color can indicate its composition and sometimes it’s fertility.Before modern tests, farmers used the color to determine the soil’s potential.Usually the darker the soil, the richer it is in organic matter, whereas Paler soil indicates low organic content.
61Soil CharacteristicsSoil texture is determined by the size of the particles in the soil and influences the ease or difficulty of cultivation.There are three main categories of soil texture.Clay consists of the smallest particles of soil, then silt, and the largest sand.Loam is a soil type that consists of a mixture of all three soil textures.
62Soil Characteristics Soil texture also also influences porosity. Porosity is the measure of the size of spaces between particles.The finer the texture, the smaller the spaces between them and the harder it is for water and air to travel through the soil.The best soil texture for agriculture is silt or loam because it contains just the right amount of porosity.
63Soil CharacteristicsA Soil Triangle is a diagram used to classify soil texture.
64Soil CharacteristicsSoil structure is a measure of the clumpiness of soil.Soil clumps that are too large can discourage plant roots from establishing, where no clumps at all can compact soil which reduces it’s ability to retain water.
65Soil CharacteristicsSoil pH is the acidity or alkalinity of the soil, which determines the soil’s ability to support plant growth.Too extreme of a pH will kill plants, but the perfect balance will allow nutrient availability and better plant growth.
66Soil CharacteristicsSoil characteristics determine plant’s ability to provide plants with nutrients.Cation Exchange is the process of which plants acquire nutrients through.In Cation Exchange, soil particles containing nutrient ions exchange them with hydrogen ions from plants. The soil particles then replenish through an exchange with soil water.
67Soil CharacteristicsDifferent types of soil have different abilities of holding cations.Soil rich in organic matter, low in acidity, and fine in texture has the greatest cation exchange capacity.
69The Soil Conservation Service 1935- Pioneered measures to slow soil degradationIn response to Dust BowlUS Gov. passed Soil Conservation ActEstablished Soil Conservation Service
70The Soil Conservation Service Assess land’s resources, problems, and opportunities for conservationUse science to plan conservationMake sure conservation plans agree with land user’s objectivesImprove overall quality of life in region
71Crop Rotation Alternate crops grown in a field Return nutrients to soilPrevent diseases in crops.Common cycles include wheat/corn to soybean/legumes (return nitrogen to soil).Reduces pests
73Contour FarmingMethod of plowing furrows perpendicular to the slope of a hillPrevents the formation of rills and gullies as rainwater washes down it.Furrows act as mini dams, slowing the flow of water and catching soil washed away by the water.
74Strip CroppingA way to minimize erosion by sowing rows of different crops next to each other.Increased density of plant matter makes it harder for soil to be washed away by rain water.
75Intercropping Method of planting different crops in same field If a legume like soybeans is planted next to other crops, the other crops flourish due to the increased nitrogen-fixation by the soybeans.
76Alley Cropping Similar to intercropping Farmers plant nitrogen fixing plants in-between other crops to promote soil fertility.Nitrogen fixing plants are planted in the “alleys” between crops
77Agro-Forestry Farmers allow trees to grow in farms with their crops. Many positive effects to this method:If an area is too hot, the shade from the trees reduces water evaporation.Increased biodiversity.
78Shelterbelts Rows of trees or dense shrubbery planted around a farm. The trees and shrubs block wind and prevent erosion.Trees are harvested for wood or fruit.
79Reduced tillage/no tillage a tractor pulls a “no till drill”.Leaves behind 15-30% of plant matter, slowing the speed of water flow and reducing erosion.
80Conservation TillageSame method as reduced tillage except more plant matter is left behind (30-40%).Decomposing organic matter reduces need for fertilizer.Reduces amount of tractor driving, reducing fuel consumption.
81Poly-Varietal Cultivation Method of planting many different species of crops on the same field at the same time.Beans, squash, peppers, etc all in same field.25% of world’s cropland
82Gully reclamationGully- landform created by erosion of running water over a period of time.Gullies can run through essential crop land.The process of reclaiming these gullies starts with diverting the water flow so erosion stops.Filling in and making the land suitable for crops again is very costly.
84Land Classificationland is classified by geology, topography, soils, vegetation, climate conditions, living species, water resources.Lets farmers know if land is sustainable for crops or better for livestock.