CCA EXAM International Questions and answers, graded A+

Document Content and Description Below

CCA EXAM International Questions and answers, graded A+ Which of the following is not considered when comparing a crop rotation with a monoculture? a. sociological consequences b. IPM c. labor ... and equipment needs d. yields - ✔✔-a. sociological consequences Which of the following is an advantage of a crop rotation over a monoculture? a. higher level of management required b. timing fertilizer and pesticide application easier c. less equipment needs d. risk spread across more than one commodity - ✔✔-d. risk spread across more than one commodity Which of the following is a limitation of crop rotation over a monoculture? a. more equipment needed b. lower level of management required c. yield of all crops in the rotation increase d. irrigation usually needed - ✔✔-a. more equipment needed ____________ increases available N, reduces erosion and increases infiltration. a. cover crops b. fallow c. nurse crops d. companion crops - ✔✔-a. cover crops A double cropping system is where two crop are grown in the same field over _______________ months. a. 36 b. 24 c. 18 d. 12 - ✔✔-d. 12 ___________ is not a limitation of cover and companion crops. a. increased soil erosion b. reduced yields c. soil water depletion d. increased cost - ✔✔-a. increased soil erosion Fields are fallowed to conserve _____________. a. energy b. nutrients c. water d. pesticides - ✔✔-c. water Pesticide carryover is important in ______________ crops. a. rotational b. cover c. companion d. adjacent - ✔✔-a. rotational __________ is when a plant produces a chemical toxin that impairs the growth of different plant. a. allelopathy b. antibiosis c. autotoxicity d. symbiosis - ✔✔-a. allelopathy In clean till systems, tillage can spread__________. a. insects b. disease c. weeds d. both b and c - ✔✔-d. both b and c Starter Fertilizer is commonly recommended for___. a. pastures b. no-till c. clean-till d. all crops - ✔✔-b. no-till The soil test values in the top 2 inches of the soil are _____ soil test values bellow 2 inches in no-till situation. a. equal too b. larger than c. smaller than d. less important than - ✔✔-b. larger than Which of the following must be sufficiently high to justify conversion of non-cropland to cropland a. nutrient availability b. pest populations c. crop yield potential d. erosion potential - ✔✔-c. crop yield potential Offspring of two plants which differ genetically are ________. a. clones b. hybrids c. sisters d. parent - ✔✔-b. hybrids Pollination is _________ in an an open-pollinated variety. a. artificial b. controlled c. negligible d. natural - ✔✔-d. natural Which of the following is usually most important when selecting a variety for planting? a. insect resistance b. yield potential c. lodging rating d. irrigation needs - ✔✔-b. yield potential Transgenic crops contain___________. a. genes from another organisms b. altered genes from the same species c. untransformed genes d. all of the above - ✔✔-d. all of the above Which of the following is a characteristic of a well designed field trial? a. replicated strips b. replicated strips c. higher than normal fertilizer rates d. irrigation of typically dry cropland - ✔✔-b. replicated strips GMO's include _____________. a. transgenic crops b. mutated crops by radiation c. natural mutation d. all of the above - ✔✔-d. all of the above Which of the following is not usually found on a seed information tag? a. seed size b. pure seed percentage c. other crop seed percentage d. germination percentage - ✔✔-a. seed size Seed quality is usually highest for seed stored under _______________. a. low temp and humidity b. low temp and light c. low temp and oxygen d. low temp and nitrogen - ✔✔-a. low temp and humidity Which of the following is a limitation of seed treatment. a. more seedling disease b. less symbiotic N fixation c. cost d. higher germination percentage - ✔✔-c. cost Storage in a _____ likely decreases bacterial inoculum viability the most. a. pesticide shed b. refrigerator c. cool, dry building d. dealer show room - ✔✔-a. pesticide shed Which of the following germ tests is best to evaluate germination under optimum conditions? a. wet towel b. dry towel c. warm d. cold - ✔✔-c. warm If pure live seed content is 90% and germination is 90% what is the % PLS a. 90 % b. 99% c. 100% d.81% - ✔✔-d.81% 0.9 * 0.9 If % pure live seed is 80% and the recommended seeding rate is 80lbs per acre, what adjusted seeding rate should be used? a. 100lbs per acre b. 64 lbs per acre c. 80 lbs per acre d. 88 lbs per acre - ✔✔-a. 100lbs per acr [Show More]

Last updated: 2 years ago

Preview 1 out of 14 pages