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silting    
淤积; 淤塞; 沉沙

淤积; 淤塞; 沈沙


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  • Greenhouse gas emissions in US beef production can . . . - Nature
    The United States is the world’s largest beef producer and fourth largest exporter, processing ~33 million head of cattle to produce over 12 3 million tonnes (Mt) of beef each year 1,2 While
  • Meat and meat products in human nutrition . . . - Meat and health
    Meat production is a very complex operation depending not only on demand (which is usually based on price and income) but on many social and economic influences such as official policy, price support mechanisms, and interrelations such as the interaction between beef and milk production, the availability of animal feedstuffs and competition for
  • Overview of US Beef Production, Export, Import and Domestic . . .
    1 The year 2003 is firmly in memory as the year that “BSE stole Christmas 2” In 2003 total US beef production was 26 34 billion pounds, 2 52 billion pounds of beef were exported, 3 01 billion pounds of beef were imported, and total domestic beef disappearance was 27 00 billion pounds corresponding to 65 03 pounds per person
  • Agriculture and Aquaculture: Food for Thought | US EPA
    A single cow produces between 154 to 264 pounds of methane gas per year Not counting for the emissions of any other livestock, 1 5 billion cattle, raised specifically for meat production worldwide, emit at least 231 billion pounds of methane into the methane into the atmosphere each year (Our World in Data)
  • MEAT, MILK AND MORE - mamopanel. org
    19 kg of meat and 44 kg of milk—this is projected to increase to 26 kg of meat and 64 kg of milk in 2050 1,2,3 These projections are significant, given that Africa’s population is expected to reach 2 2 billion by 2050 4 It thus appears to be reason for optimism that the livestock sector in some African countries is the
  • The global growth in meat production - Financial Times
    The amount of chicken and pig meat produced has grown the most globally Poultry production is generally less intensive in low-income countries — but that is changing with the growth of intensive
  • Researchers Find Hidden ‘GEMS’ to Meat Production
    For example, Boggess said that optimal animal genetics must match the environment; management systems must be appropriate to maximize the efficiency of the production systems while ensuring adequate productivity; and all meat animal systems must address evolving pressures from society relating to product quality, healthfulness, animal care and





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