Leaf area index (LAI) is an indicator of the size of assimilatory surface of a crop. Approaches to benchmark yield and quantify yield gaps 23 4.1. Part of this information is the absolute high and low yield for the entire history of the data series, some of which extend back over 150 years. Harvest index definition, a measurement of crop yield: the weight of a harvested product as a percentage of the total plant weight of a crop. To cut down needlessly the outer margins of a book. Desirable attributes of models in yield gap studies 18 3.3.2. For example, if a wheat producer counted 30 heads per foot squared, and each head contained 24 seeds, and assuming a 1,000-kernel weight of 35 grams, the crop yield estimate using the standard formula would be 30 x 24 x 35 x 0.04356 = 1,097 kg/acre. yield meaning: 1. to supply or produce something positive such as a profit, an amount of food or information: 2…. Learn more. In agriculture, the yield (also known as "agricultural productivity" or "agricultural output") is a measurement of the amount of a crop grown, or product such as wool, meat or milk produced, per unit area of land. Dr. Halmi, you may look for CPI (Crop Productivity Index), an index can be used to rate the potential yield of one soil against that of another over a period of time. Weather data for modelling crop yield 19 3.3.3. Traditionally, yield is the proportion of correct items (conforming to specifications) you get out of a process compared to the number of raw items you put into it.  One of the three seeds must be set aside for the next planting season, the remaining two either consumed by the grower, or for livestock feed. In short, the notion that higher crop yields is a net positive of increasing CO2 that offsets any negative effects is an extremely weak argument. It can help achieve zero hunger, which is among the top of UN Sustainable Development Goals for the year of 2030.  Each technological advance increasing the crop yield also reduces the society's ecological footprint. As the human population soars well beyond 7 billion people, so does the demand for food. Traditional yield: Output versus input. Crop production index (2004-2006 = 100) Definition: Crop production index shows agricultural production for each year relative to the base period 2004-2006. YA allows 60% of the T-yield to replace the actual yield, where the T-yield – or transitional yield – is specified by the R… from The Century Dictionary. ABSTRACT- Harvest index (HI), ratio of seed yield to aboveground dry matter, is a very important parameter for estimating seed yield in several crop models. This visualization shows the index of the arable land area needed to produce an equivalent aggregate of crop production, relative to the land area needed in 1961 i.e. Sometimes crop yield is referred to as "agricultural output.". 2 Consejo Nacional de Investigaciones Científicas y Técnicas. The U.S. Department of Agriculture (USDA) produces charts and maps displaying crop yields, crop weather, and crop acreage animations to help U.S. farmers maximize agricultural product output. This measure is more commonly used for legumes, grains or cereal. Advancements in farming techniques, utilization of fertilizers, and a robust economy are contributing factors to record crop production in recent years. http://www.theaudiopedia.com What is CROP YIELD? Plant Early, Plant Effectively. The seed ratio is another way of calculating agricultural productivity. Crop yield is the measure most often used for cereal, grain, or legumes and typically is measured in bushels or pounds per acre in the U.S. Agriculture, as the backbone of many developing economies (especially in Africa), provides a substantial portion of their Gross Domestic Product (GDP). As verbs the difference between yield and crop is that yield is (archaic|obsolete) to pay, give in payment; repay, recompense; reward; requite while crop is to remove the top end of something, especially a plant. Monitoring crop condition and crop yield and production forecasting are important for agriculture and economic departments at state, national and even international levels. Crop yield determination is a crucial function in planning for food security of the population of a district or even of the whole country. intransitive verb To feed on growing grasses and herbage. The units by which the yield of a crop is usually measured today are kilograms per hectare or bushels per acre. NASS publications cover a wide range of subjects, from traditional crops, such as corn and wheat, to specialties, such as mushrooms and flowers; from calves born to hogs slaughtered; from agricultural prices to land in farms. The U.S. government monitors crop yields of foreign countries to maintain a pulse on their economic health. crops, water stress results in a decrease of leaf production, a reduction in leaf area index (LAI), an increase in senescence rate,andfinallyyieldreduction(Baretetal.,2007).Inthecase of water stress, actual crop growth and yield are influenced by factors such as the amount and timing of precipitation, Regional and income group aggregates for the FAO's production indexes are calculated from the underlying values in international dollars, normalized to the base period 2004-2006. USDA National Agricultural Statistics Service Information. The indirect effects include those on percentage emergence and time from sowing to emergence. For example, if three grains are harvested for each grain seeded, the resulting seed ratio is 1:3, which is considered by some agronomists as the minimum required to sustain human life. Crop yield is a measurement of the amount of agricultural production harvested—yield of a crop—per unit of land area. The idea for this chart is taken from Ausubel, Wernick, and Waggoner (2013). Chickpea To shear; cut the nap from, as woolen cloth. The availability of crop area statistics is an essential requirement of the agricultural statistical system of any country, as it is a key variable in estimating crop production and crop yield. Historically speaking, a major increase in crop yield took place in the early eighteenth century with the end of the ancient, wasteful cycle of the three-course system of crop rotation whereby a third of the land lay fallow every year and hence taken out of human food, and animal feed, production. Accurate and timely information on crop supply and quality is crucial for policy-makers, HI estimation methods are categorized into two groups including: (i) complex For example, a grain of wheat yielding three new grains of wheat would have a crop yield of 1:3. Synonym Discussion of yield. Enrich your vocabulary with the English Definition dictionary It is weighted by the commodity prices. In agriculture, crop yield refers to the measure of seeds or grains which is generated from a unit of land. In certain cases, APH yields can be adjusted using Yield Adjustment (YA), Yield Endorsement (YE), and Trend Adjustment Endorsement (TA). What is interesting to note is, for many products, the absolute low crop yield occurred in the 1930s during the time of the Great Depression and Dust Bowl years, while the absolute high crop yield has occurred in the last year or two (2016/2017) as fertilizers, farming techniques, and a robust economy have all contributed to record levels of agricultural product output in the U.S. The timeliness in producing these estimates is a vast improvement over the present assessment capability at the county level. Agribusiness is the business sector encompassing farming and farming-related commercial activities. With this type of insurance, the indemnity is based on the realized (harvested) average yield of an area such as a county or district. Crop Acreage and Yield Crop Acreage and Yields USDA produces charts and maps displaying crop yields, crop weather, micromaps, and crop acreage animations. The National Commodity Crop Productivity Index (NCCPI) model is a "national soil interpretation that is not intended to replace other crop production models developed by individual states. Crop production index (2004-2006 = 100) Food and Agriculture Organization, electronic files and web site. (1977): Winkler Prins Geschiedenis der Nederlanden Prehistorie tot 1500, Amsterdam/Brussel, —Max Roser and Hannah Ritchie, Yields and Land Use in Agriculture, 2016, https://en.wikipedia.org/w/index.php?title=Crop_yield&oldid=992108257, Short description is different from Wikidata, Articles with unsourced statements from March 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 3 December 2020, at 15:16. Then the harvested crop is weighed, and the crop yield of the entire field is extrapolated from the sample. When more than four years of yields exist, yields used in determining guarantees and premiums for crop insurance typically are based on the insurable unit’s actual yields. Spatial estimates of crop yields at county and sub-county levels offer a major improvement of current capabilities. At present, NCCPI is used in the National Soil Information System (NASIS) environment and is … Understanding crop yield is central to sustainable development. assessment of crop yield forecasts for corn and soybeans. In agriculture, crop yield refers to the measure of seeds or grains which is generated from a unit of land. The seed ratio is another way of calculating agricultural productivity. Area-yield index insurance: Area-yield index insurance was first developed in Sweden in the early 1950s and has been implemented in India since 1979 and in the United States since 1993. Incorporating MODIS derived phenology metrics improved model performance. Understanding worldwide crop yield is central to addressing food security challenges and reducing the impacts of climate change. The survey is conducted in all states except Alaska and Hawaii. In most of the cases yield data are not recorded, but are obtained by dividing the production data by the data on area harvested. Long-term cereal yields in the United Kingdom were some 500 kg/ha in Medieval times, jumping to 2000 kg/ha in the Industrial Revolution, and jumping again to 8000 kg/ha in the Green Revolution. In theory, seed germination, vigour and size (three aspects of seed quality) may influence crop yield through both indirect and direct effects. Yp is not shown for rainfed crops, although Yp is used for estimating the water limitation index (see definition below). Bornewasser, J.A. Thus, yield is a major decision-making tool used both by companies and investors. How to use yield in a sentence. 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