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  1. No-till farming - Wikipedia

    No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage. No-till farming decreases the amount of soil erosion tillage causes in certain soils, especially in sandy and dry soils on sloping terrain. Other possible benefits include an increase in the amount of water that infiltrates into the soil, soil retention of organic matter, and nutrient cycling. T…

    No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage. No-till farming decreases the amount of soil erosion tillage causes in certain soils, especially in sandy and dry soils on sloping terrain. Other possible benefits include an increase in the amount of water that infiltrates into the soil, soil retention of organic matter, and nutrient cycling. These methods may increase the amount and variety of life in and on the soil. While conventional no-tillage systems use herbicides to control weeds, organic systems use a combination of strategies, such as planting cover crops as mulch to suppress weeds.

    There are three basic methods of no-till farming. "Sod seeding" is when crops are sown with seeding machinery into a sod produced by applying herbicides on a cover crop (killing that vegetation). "Direct seeding" is when crops are sown through the residue of previous crop. "Surface seeding" or "direct seeding" is when seeds are left on the surface of the soil; on flatlands, this requires no machinery and minimal labor.

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    Tillage is the agricultural preparation of soil by mechanical agitation, typically removing weeds established in the previous season. Tilling can create a flat seed bed or one that has formed areas, such as rows or raised beds, to enhance the growth of desired plants. It is an ancient technique with clear evidence of its use since at least 3000 B.C.

    No-till farming is not equivalent to conservation tillage or strip tillage. Conservation tillage is a group of practices that reduce the amount of tillage needed. No-till and strip tillage are both forms of conservation tillage. No-till is the practice of never tilling a field. Tilling every other year is called rotational tillage.

    The effects of tillage can include soil compaction; loss of organic matter; degradation of soil aggregates; death or disruption of soil microbes and other organisms including mycorrhizae, arthropods, and earthworms; and soil erosion where topsoil is washed or blown away.

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    The practice of no-till farming is a combination of different ideas developed over time, many techniques and principles used in no-till farming are a continuation of traditional market gardening found in various regions like France. A formalized opposition to plowing started in the 1940s with Edward H. Faulkner, author of Plowman's Folly. In that book, however, Faulkner only criticizes the deeper moldboard plow and its action, not surface tillage. It was not until the development after WWII of powerful herbicides such as paraquat that various researchers and farmers started to try out the idea. The first adopters of no-till include Klingman (North Carolina), Edward Faulkner, L. A. Porter (New Zealand), Harry and Lawrence Young (Herndon, Kentucky), and the Instituto de Pesquisas Agropecuarias Meridional (1971 in Brazil) with Herbert Bartz.

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    Land under no-till farming has increased across the world. In 1999, about 45 million ha (170,000 sq mi) was under no-till farming worldwide, which increased to 72 million ha (280,000 sq mi) in 2003 and to 111 million ha (430,000 sq mi) in 2009.
    Per figures from the Australian Bureau of Statistics (ABS) Agricultural Resource Management Survey, in Australia the percentage of agricultural land under No-till farming methods was 26% in 2000–01, which more than doubled to 57% in 2007–08. As at 30 June 2017, of the 20 million ha (77,000 sq mi) of crop land cultivated 79% (or 16 million hectares) received no cultivation. Similarly, 70% (or 2 million hectares) of the 3 million hectares of pasture land cultivated received no cultivation, apart from sowing.
    South America had the highest adoption of No-till farming in the world, which in 2014 constituted 47% of the total global area under no-till farming. The countries with highest adoption are Argentina (80%), Brazil (50%), Paraguay (90%), and Uruguay (82%).

    In Argentina the usage of no-till resulted in reduction of soil erosion losses by 80%, cost reductions by more than 50% and increased farm incomes.

    In Brazil the usage of no-till resulted in reduction of soil erosion losses by 97%, higher farm productivity and income increase by 57% five years after the starting of no-till farming.

    In Paraguay, net farm incomes increased by 77% after adoption of no-till farming.
    No-till farming is used in the United States and the area managed in this way continues to grow. This growth is supported by a decrease in costs. No-till management results in fewer passes with equipment, and the crop residue prevents evaporation of rainfall and increases water infiltration into the soil.

    In 2017, no-till farming was being used in about 21% of the cultivated cropland in the US. By 2023, farmland with strict no-tillage principles comprise roughly 30% of the cropland in the U.S.

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    Some studies have found that no-till farming can be more profitable in some cases.

    In some cases it may reduce labour, fuel, irrigation and machinery costs. No-till can increase yield because of higher water infiltration and storage capacity, and less erosion. Another possible benefit is that because of the higher water content, instead of leaving a field fallow it can make economic sense to plant another crop instead.

    A problem with no-till farming is that the soil warms and dries more slowly in spring, which may delay planting. Harvest can thus occur later than in a conventionally tilled field. The slower warming is due to crop residue being a lighter color than the soil exposed in conventional tillage, which absorbs less solar energy. But in the meantime, this can be managed by using row cleaners on a planter.

    Another problem with no-till farming is that if production is impacted negatively by the implemented process, the practice's profitability may decrease with increasing fuel prices and high labor costs. As the prices for fuel and labor continue to rise, it may be more practical for farms and farming productions to turn toward a no-till operation. In spring, poor draining clay soil may have lower production due to a cold and wet year.

    The economic and ecological benefits of implementing no-till practices can require sixteen to nineteen years. The first decade of no-till implementation often will show trends of revenue decrease. Implementation periods over ten years usually show a profit gain rather than a decrease in profitability.
    No-till farming requires some different skills from those of conventional agriculture. A combination of techniques, equipment, pesticides, crop rotation, fertilization, and irrigation have to be used for local conditions.
    On some crops, like continuous no-till corn, the residue's thickness on the field's surface can become problematic without proper preparation and equipment. No-till farming requires specialized seeding equipment, such as heavier seed drill, to penetrate the residue. Ploughing requires more powerful tractors, so tractors can be smaller with no-tillage. Costs can be offset by selling ploughs and tractors, but farmers often keep their old equipment while trying out no-till farming. This results in a higher investment in equipment.
    One of the purposes of tilling is to remove weeds. With no-till farming, residue from the previous year's crops lie on the surface of the field, which can cause different, greater, or more frequent disease or weed problems compared to tillage farming. Faster growing weeds can be reduced by increased competition with eventual growth of perennials, shrubs and trees. Herbicides s…

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