1. Compared to grain soybean seeds, vegetable soybean seeds are:
larger
sweeter
more tender
all of the above
2. Frozen vegetable soybeans are popular in the supermarkets of:
Europe
Japan
USA
Philippines
Today, vegetable soybeans are most popular in Japan. The popularity of this vegetable is spreading rapidly, however.
3. What type of soil is best for production of vegetable soybeans?
loamy, well-drained
alkaline pH (over 7.0)
very sandy
B and C
Loamy, well-drained soils are best. Alkaline soils can suffer from nutrient deficiencies. Very sandy soils may be low in fertility and are more susceptible to nematodes.
4. Why are soybean seeds inoculated with Rhizobium bacteria?
prevent nematode problems
increase nitrogen uptake through roots
protect seed from harmful bacteria
prevent Rhizoctonia root rot
5. When should nitrogen fertilizer be applied for this leguminous crop?
before planting
at flowering and pod filling stages
both A and B
nitrogen fertilizer is not needed
6. Seeds are treated with a fungicide before sowing to prevent:
rust disease
soil-borne diseases
beanflies in seeds
none of the above
7. Weeds are best controlled by:
applying pre-emergent weedicides
handweeding after crop is established
rotating with cabbage
combination of weedicides and handweeding
8. Adequate soil moisture is most critical at which stage of plant growth?
stem elongation
flowering and pod filling
just before harvest
none of the above
9. This photo shows symptoms of what disorder?
rust disease
downy mildew disease
excessive heat
stink bugs
This photo shows an advanced stage of rust.
10. Beanflies cause most of their damage by:
feeding inside stems
boring inside pods
eating leaves
all of the above
Notice the beanfly maggot inside the stem.
11. To control pod borers, stink bugs, and defoliating insects:
spray 7-10 days before harvesting to protect pods
use resistant cultivars
use insecticides at the first presence of pests
spray only after high populations of pests appear
Spray only after high populations appear. There are no resistant cultvars. These pests rarely cause significant damage. Avoid spraying near harvest to prevent pesticide residues in crops.
12. Why are soybeans harvested at night?
preserve green color and freshness of pods
daytime labor is too difficult to find
pods remove easier from plant
workers have insomnia
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