CCA EXAM International Exam| Questions with 100% Verified Solutions

CCA EXAM International Exam| Questions with 100% Verified Solutions If the bas temperature is 60 F, the daily temp is 80 F and the max is 95 F how many heat units have accumulated? a. 20 b. 60 c. 80 d. 0 - ANSWER -a. 20 In many crops night length is important in triggering __________. a. germination b. flowering c. photosynthesis d. vernalization - ANSWER -b. flowering The growing point of a grass is _. a. leaf tip b. root tip c. flower d. intercalary meristem - ANSWER -d. intercalary meristem The optimum temperature for crop growth and development _____ with crop growth stage. a. increase b. decreases c. changes d. does not change - ANSWER -c. changes Water needs of a crop typically increase during the season to maximum, followed by ____________. a. a second increase at harvest b. a level period until harvest c. a decline to harvest d. rainfall - ANSWER -c. a decline to harvest Which of the following accelerates canopy closure ? a. wide rows b. narrow rows c. upright plant growth d. lower plant population - ANSWER -b. narrow rows A plant that lives 10 years is a __________ - ANSWER -perennial Crop root growth can be affected by ____________. a. diseases b. insects c. acid soils d. all of the above - ANSWER -d. all of the above Which root system concentrates nutrient uptake in surface soil? a. membranous b. filamentous c. tab d. fibrous - ANSWER -d. fibrous A crop should be replanted when stand is lost due to some stress, when _______________. a. it is economically justified b. when the field looks bad c. when your neighbor replants d. when you have no crop insurance - ANSWER -a. it is economically justified Which of the following may eliminate the possibility of replanting? a. late first planting b. good weather c. good seed supply d. seed fertility - ANSWER -a. late first planting When diagnosing a crop production problem in the field, you should ____. a. consider diseases then fertility problems b. consider herbicide damage first c. compare damaged areas with normal areas d. wait until problem has existed - ANSWER -c. compare damaged areas with normal areas Which of the following is probably not helpful in diagnosing a crop problem in the field? a. cropping history b. pesticide history c. seeding depth d. days of sunlight - ANSWER -d. days of sunlight ______ is used to locate a poistion in a field. a. GIS b. GPS c. GUS d. UPS - ANSWER -b. GPS ___ is used to apply fertilizers, pesticides and seeds at different rates across a field. a. GPS b. UPS c. VRT d. CRT - ANSWER -c. VRT ___________ is an area that is managed similarly for a given crop input. a. CMZ b. UPS c. VRT d. CRT - ANSWER -a. CMZ Sandy soils have greater ________ than clay loam soils which can affect yield a. drought potential. b. water holding capacity c. available water d. surface area - ANSWER -a. drought potential. geographical coordinates combine _________ and _________. - ANSWER latitude and longitude Yield maps ____from year to year for the same crop. a. vary b. remain constant c. superimpose d. increase - ANSWER -a. vary Yield monitors are ___________________. a. independent of combine speed