Scsc 105 carson Study guides, Class notes & Summaries

Define the term weed. correct answer: A weed is a plant growing where it is not wanted i.e. Bermuda Grass - Front Lawn vs Corn Field List and briefly explain the 6 effects that weeds have on agriculture. correct answer: 1) Reduce the yield of cultivated crops (compete for essential nutrients) 2) Increase Production Costs (20% yield decrease = $28 billion) 3) Some weeds are Allelopathic (deadly chemical radius) 4) Devalue the Primary Crop (Purity Affected) 5) Can be detrimental ...

Agriculture in the 1600s-1700s (farm size, labor force, production methods) correct answer: Small farm size - 90% - Manual labor-Primarily hand labor-ax, hoe, shovel, sickle, scythe-grain cradle, animal labor, horse and mules. Agriculture in the 1800s (farm size, labor force, production methods) correct answer: Small to medium farms (large plantations in south) - 58% - Mechanical inventions developed for all phases of production, Horse powered equipment, and slaves used in the south - After...

Vegetation Manipulation correct answer: periodic burning to manage vegetation; es new growing to attract animals sses undesirable veg 3. increase nutrient availability to plants domestication of crops correct answer: adapting/taming of wild species of plants to be used by humans needed: -achieve a secure food supply -sedentary populations were increasing -farming required more labor than h&g, but fed a larger pop. when successful climate changes created favorable growing conditions...

Soybean - China/ Japan Rice - India Sugar Cane - Indonesia Wheat - Near East Sorghum - Africa Potato/ Tomato - South America Corn - Mexico Sunflower - North America Perfect triangle of nutrition - legumes, grains, veggies Why international Programs fail - Too short lack of continuity of expert scientists bad research efforts across scientific disciplines bad training for young scientists in the country number 1 issue with food security - Distribution Ag method...

origin of soybean correct answer: China / Japan origin of rice correct answer: India origin of sugar cane correct answer: Indonesia origin of wheat/barley correct answer: Near East origin of sorghum correct answer: Africa origin of potato/tomato correct answer: South America origin of corn correct answer: Central America/Mexico origin of sunflower correct answer: North America What 3 food groups form the perfect triangle of nutrition? correct answer: Legumes, gra...

identify the two main crops discussed in the documentary, what pest threatened them, and where they were grown. correct answer: Papaya- ringspot virus, Hawaii Banana- Banana Wilt(bacteria), Uganda Match the primary individuals featured in the documentary to their qualifications/associations and their position on GMOs. correct answer: Jeffery smith - no training, against Margaret Wille- Hawaii city council member, M. Education, against Brenda Ford- former biology major Define ecosyste...