Characteristics of traditional agroecosystems include - take advantage of the full range of
microenvironmental variation within the cropping system, farm, and region; are built on the knowledge
and culture of local inhabitants; tolerate of local conditions, insects and diseases, dependent on exte...
MSU AGN 115 EXAM 1 | 100% Correct
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Characteristics of traditional agroecosystems include - ✔✔take advantage of the full range of
microenvironmental variation within the cropping system, farm, and region; are built on the knowledge
and culture of local inhabitants; tolerate of local conditions, insects and diseases, dependent on external,
purchased inputs
according to gliessman, the prevailing modern agriculture system is not sustainable. ___ is not a factor
he says contrives to our unsustainability (ch 1) - ✔✔--!
reliance on synthetic or mineral fertilizer would normally be associated with - ✔✔conventional
agriculture
normally ab 25% or more of biomass at one trophic level is converted to biomass at the next trophic
level (ch 2) - ✔✔false
in the penn and teller: Norman Borlaug vid, dr. Terri Lomax, prof of botany and plant pathology, said that
genetically modified crops are subjected to millions of dollars in test and are regulated by EPA, FDA, and
USDA, while protestors and admin. (eg Charles margulus) affiliated with Greenpeace claimed the crops
were released without testing - ✔✔true
order the levels from least to most complex - ✔✔organism
population
community
ecosystem
when examining the trophic structure of the community of organisms within an ecosystem, we find that
first level consumers obtain their biomass and nutritive needs by consuming producers. members of this
level are called - ✔✔heterotrophs
for US census purposes, a farm is defined as (lec 2) - ✔✔---!
, when international investors purchase or rent land for large scale export agriculture in less developed
countries it can affect those countries how? - ✔✔got it right
nutrient leaks in a ecosystem are a result of - ✔✔bare soil between crop plants and or crop seasons
Even where irrigation is practiced on a large scale, agriculture has very little effect on the local hydrology
and microclimate. - ✔✔false
extensively branched, white roots in subsoil would be associated with - ✔✔good soil health
one important trait of a natural ecosystem is overall stability in spite of changes or perturbations within
the system. the concept is known in ecology as - ✔✔dynamic equilibrium
word choice and selection of sources of information are important indicators of potential bias in a
publication, such as dr. gliessman's use of the terms industrial agriculture and pesticide treadmill, and his
heavy reliance on the publication of Dr. Pimentel as sources of data - ✔✔true
ab ___% of ag land worldwide that is irrigated produces ___% of world food - ✔✔20;40
in fresh, Andrew kimbrell said that new data show that medium size organic are far more productive that
any sized conventional system; however data from recent university studies show that organic systems
are usually - ✔✔equal to or lower yielding than conventional systems
due to its longer growing season, generally warmer temps, and areas with sandy soils, the ____ region of
MO is most associated with the production of cotton - ✔✔bootheel
erle ellis conducted studies of traditional agroecosystems in china and observed that ___ was likely the
limiting factor on productivity - ✔✔nitrogen as a nutrient
Thomas malthus, an Anglican rector with a good mind for mathematics became concerned about the
inevitability of widespread human misery. in a 1798 essay, he forecast that widespread starvation and
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