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CropCultivationScience

1The main object of crop cultivation research is（）
2There are some differences in crop species and technical level in different regions， because of the （）results of crop cultivation
3Different crops are planted in different seasons because of the （）results of crop cultivation
4The following are not crops （）
5Crops can be divided into C3 crops and C4 crops according to the（）way of assimilation
6With good varieties， it will be able to produce high yield
7The goal of crop production is only to achieve high yield
8The origin and formation of crops are the product of natural selection and human labor
9Rape is a common oil crop
10Generally， the yield of crops is divided into biological yield and economic yield
11Wheat belongs to （）
12Among the comprehensive external conditions needed in the vernalization stage， （）plays a leading role
13The dry weight of wheat kernel in （）reached the maximum
14The yield per unit area of wheat is composed of spikes per unit area， （）and kernel weight
15The basis for determining the appropriate sowing date of winter wheat is （）and the characteristics of variety development
16Currently cultivated common wheat is diploid
17The whole life of wheat refers to the process from seed germination to the generation of new seeds
18The higher the temperature， the faster the grain filling rate of wheat
19The processing quality of wheat grain can be divided into primary processing quality and secondary processing quality
20The earlier spring wheat is sown， the better
21How many seed roots are there in rice?
22What is the beginning of the reproductive growth period of rice?
23Which continent in the world has the largest area of rice cultivation?
24At what time did the root system of rice grow?
25What is the critical period for determining the panicle number of rice?
26The cold resistance of Japonica Rice is stronger than that of Indica Rice
27Cultivated rice is a member of the genus plant taxonomy in the cruciferous family
28The growing period of rice is the total number of days from sowing to maturity
29The root of rice can be divided into white root， yellow root and black root in appearance， and yellow root has the strongest activity
30China is the largest rice-growing country in the world
31（）is the worlds largest corn producer
32The type of corn suitable for current dense planting high yield cultivation is　 （）
33（）Is the period when corn needs the most amount of fertilizers and the intensity of fertilizers is the greatest in this lifeDuring this period， top dressing must be strengthened to prevent the phenomenon of defertilization
34The important sign of physiological maturity of corn is （）
35The main functional leaf layer of maize in the middle and late stages of grain filling is （）
36The whole process of corn mechanization is the only way for modern corn production， and the mechanical grain harvest is the last mile of the whole process of mechanization
37The objectives of field management in the ear of corn are centered on ear promotion， root promotion， leaf promotion and stalk control
38With the increase in planting density， corn production can continue to increase
39The number of rows of corn ears is generally odd
40The constituent factors of corn grain yield are the number of panicles per unit area， the number of kernels and the weight of kernels
41The following non potato related names are （）
42Potato originated from （）
43Potato chips grow at the top of （）
44The main product organ of potato is （）
45The storage temperature of edible potato is about （）
46Potatoes originated in China
47The end connecting potato tuber and stolon is called the top
48The growth period of tuber is the critical period of potato water requirement
49Reducing sugar content is the most strict index of potato tuber quality in fried food processing
50The starch content of potato tuber is about 12% - 22%
51Which country has the largest cotton planting area in the world in 2018?
52Among the four cultivars of cotton， （）is the most widely cultivated
53The most important factor causing the shedding of cotton is （）
54What is the index to measure the tensile properties of cotton fiber?
55What is the most widely used growth regulator in cotton production?
56Cotton has a fixed number of nodes， which varies according to genotype
57There are only leaves growing on cotton leaf branches， without bolls
58Among the cotton yield components， the biggest variation is the number of bolls
59The main component of cotton fiber is cellulose
60Cotton cannot be harvested by machinery
61Double low rape refers to the rape with low content of glucosinolate and （）
62The yield components of rape are composed of four factors: number of plants per unit area， number of pods per plant， number of seeds per pod and （）
63The fruits of rape are developed from （）
64What is on the stem segment or branch of the upper part of the main stem?
65Spring rape refers to the rape that be sown in（）and harvested in autumn
66Press oil from rape flowers and leaves in production
67The root of rape is straight root
68Rape is not sensitive to light and temperature
69Rape mainly depends on POD photosynthesis to form yield， but leaf photosynthesis has no contribution to yield
70Rape is suitable for continuous cropping
71The most common color of soybean seed coat is （）
72Soybean is a typical （）crop
73The raw material of tofu is （）
74Soybean top dressing time is generally （）
75Soybeans are （）crops
76Soybeans should not be used to extract oil
77Soybean does not produce nodules
78Soybean seeds can also germinate below 0 ℃
79As long as the number of plants is enough， soybean can get high yield
80Continuous cropping and successive cropping will cause serious yield reduction and quality deterioration of soybean
81Gelatinization temperature refers to the temperature at which millet starch grains expand in hot water and become irreversibleThe lower the gelatinization temperature is， the easier it is for millet to boil and taste better
82Millet originated from （）
83The lowest temperature of millet germination is （）
84Millet is （）
85The root of millet is （）
86Millet originated in the United States
87Millet does not tiller
88It is not suitable for continuous cropping of millet
89The kernel of millet does not contain protein， and the main nutrient is fat
90The consistency of rice glue reflects the consistency of rice glue after cooling， which is related to the softness of rice
91In botanical classification， sorghum belongs to the family sorghum
92Sorghum is suitable for continuous cropping
93The starch content of sorghum grains for brewing should not be less than 70%
94The period of heading and flowering is the period with the largest leaf area of sorghum
95The roots of sorghum are straight roots
96Sorghum belongs to Gramineae
97Sorghum is a light loving cropIn the process of growth and development， sufficient light conditions are required
98Sorghum belongs to the crop of short sunshine， which can be heading and ripening ahead of time by shortening the sunshine hours
99Sorghum has strong ability of drought resistanceIt can not only resist soil drought， but also atmospheric drought
100The number of sorghum leaves is the same as that of stem nodes