娇棚帘焦拆菇饶姑炯圈沪湍珊
Chapter 1 General introduction Chapter 1 Week 1 Unit test
1、 The objective of crop cultivation are
A:A. The relationship between crops and the environment
B:B. The relationship between crops and management
C:C. The relationship between crops, environment and management
D:D. The relationship between environment and management
答案: C. The relationship between crops, environment and management
2、 The diversity of plants combined with environmental and socio-economic conditions constitute the characteristics of crop cultivation.
A:A. Seasonal
B:B. Regional
C:C. Complexity
D:D. Volatility
答案: C. Complexity
3、 The general process of crop growth, follow a
A:A, S-shaped curve
B:B, bell-shaped curve
C:C, parabola
D:D, dumbbell-shaped curve
答案: A, S-shaped curve
4、 The leaf area index can be defined as the
A:A, green leaf area/yellow leaf area
B:B, land area/leaf area
C:C. Total green leaf area/land area
D:D, yellow leaf area/green leaf area
答案: C. Total green leaf area/land area
5、 The following are long-day crops
A:A, soybean
B:B, late rice
C:C, tobacco
D:D, rapeseed
答案: D, rapeseed
6、 The spring wheat varieties are supposed to introduced from southern of China to northern China, and which phenomenon will often occurs.
A: A. Early heading or freezing damage
B:B. Early heading or no heading
C:C. Late heading or freezing damage
D:D. Late heading or no heading
答案: A. Early heading or freezing damage
7、 Wheat grains are called caryopsis in botany, and they are composed of embryo, and endosperm.
A:A seed coat
B:B cortex
C:C fruit skin
D:D aleurone layer
答案: B cortex
8、 The three base points of temperature refer to
A:A, the lowest, optimal and the ceiling temperatures
B:B, the lowest, the second lowest and the ceiling temperatures
C:C, the lowest sub-high and t the ceiling temperatures
D:D, the lowest, the ceiling, and the average temperatures
答案: A, the lowest, optimal and the ceiling temperatures
9、 The adaptation temperature range of crops usually showing that
A:A. Maintain life＞growth＞development
B:B. Maintain life＞development＞growth
C:C. Growth＞Development＞Maintain life
D:D.Maintain life＞Growth=development
答案: A. Maintain life＞growth＞development
10、 Which of the following soil structures is most conducive to crop growth?
A:A. Microaggregate structure
B:B. Agglomerate structure
C:C. Block structure
D:D. Sheet structure
答案: B. Agglomerate structure
11、 Among the following crops, which one is the short-day crop
A:A. Rape
B:B. Rice
C:C. Sugarcane
D:D. Buckwheat
答案: B. Rice
12、 Which crops belongs to monocots plants.
A:A. Wheat, rice, corn, barley
B:B. Cotton, rice, wheat, rape
C:C. Tobacco, ramie, rape, cotton
D:D. Sugar cane, oats, soybeans, peanuts
答案: A. Wheat, rice, corn, barley
13、 The crop growth analysis is a method according to the law of .
A:A. Spike differentiation and flower bud differentiation
B:B. Dry matter accumulation and leaf area formation
C:C. Quality formation
D:D. Yield formation
答案: B. Dry matter accumulation and leaf area formation
14、 Late-maturing varieties have fewer leaves than early-maturing varieties.
A:正确
B:错误
答案: 错误
15、 The minimum temperature for seed germination for both wheat and rice have the same requirements.
A:正确
B:错误
答案: 错误
16、 The influence of crops on the soil is dual, that is, it consumes soil nutrients on the one hand and destroys the soil structure on the other.
A:正确
B:错误
答案: 错误
17、 Dormancy is an adaptation of crops to a stress environment.
A:正确
B:错误
答案: 正确
18、 The assimilation transportation capacity of C4 crop is higher than that of C3 crop.
A:正确
B:错误
答案: 正确
19、 Leaves are the only organ for photosynthesis.
A:正确
B:错误
答案: 错误
20、 Cereal crops generally have tillering characteristics.
A:正确
B:错误
答案: 错误
21、 Maintaining a high root-shoot ratio throughout the life history of crops is the basis for high yield and quality.
A:正确
B:错误
答案: 正确
22、 The high-yielding crop population structure requires the larger storage capacity.
A:正确
B:错误
答案: 错误
作业Chapter 1 General introduction Chapter 1 Week 1 Unit homework
1、 1. The definition of crop cultivation
评分规则: 1. The definition of crop cultivation
2、 2. The task and mission of crop cultivation
评分规则: 2. The task and mission of crop cultivation
3、 3. Classification of Crops
评分规则: 3. Classification of Crops
4、 4. The origin and distribution of Crops
评分规则: 4. The origin and distribution of Crops
5、 5 The future direction of Crops cultivation
评分规则: 5 The future direction of Crops cultivation
Chapter 2 Plant growth development and regulations Chapter 2 Week 2 Unit test
1、 Which process belongs to the development of crops
A:A. Root growth
B:B. Stem growth
C:C. Leaf growth
D:D.Young spike differentiation
答案: D.Young spike differentiation
2、 The following is not a necessary condition for seed germination is
A:A, light
B:B, temperature
C:C, moisture
D:D, oxygen
答案: A, light
3、 The general process of crop growth, follow a
A:A, S-shaped curve
B:B, bell-shaped curve
C:C, parabola
D:D, dumbbell-shaped curve
答案: A, S-shaped curve
4、 The leaf area index can be defined as the
A:A, green leaf area/yellow leaf area
B:B, land area/leaf area
C:C. Total green leaf area/land area
D:D, yellow leaf area/green leaf area
答案: C. Total green leaf area/land area
5、 The following are long-day crops
A:A, soybean
B:B, late rice
C:C, tobacco
D:D, rapeseed
答案: D, rapeseed
6、 The spring wheat varieties are supposed to introduced from southern of China to northern China, and which phenomenon will often occurs.
A:A. Early heading or freezing damage
B:B. Early heading or no heading
C:C. Late heading or freezing damage
D:D. Late heading or no heading
答案: A. Early heading or freezing damage
7、 Wheat grains are called caryopsis in botany, and they are composed of embryo, and endosperm.
A: A seed coat
B:B cortex
C:C fruit skin
D:D aleurone layer
答案: B cortex
8、 The three base points of temperature refer to
A:A, the lowest, optimal and the ceiling temperatures
B:B, the lowest, the second lowest and the ceiling temperatures
C:C, the lowest sub-high and t the ceiling temperatures
D:D, the lowest, the ceiling, and the average temperatures
答案: A, the lowest, optimal and the ceiling temperatures
9、 The adaptation temperature range of crops usually showing that
A:A. Maintain life＞growth＞development
B:B. Maintain life＞development＞growth
C:C. Growth＞Development＞Maintain life
D:D.Maintain life＞Growth=development
答案: A. Maintain life＞growth＞development
10、 Which of the following soil structures is most conducive to crop growth?
A:A. Microaggregate structure
B:B. Agglomerate structure
C:C. Block structure
D:D. Sheet structure
答案: B. Agglomerate structure
11、 Among the following crops, which one is the short-day crop.
A:A. Rape
B:B. Rice
C:C. Sugarcane
D:D. Buckwheat
答案: B. Rice
12、 In the following crops belongs to monocots.
A:A. Wheat, rice, corn, barley
B:B. Cotton, rice, wheat, rape
C:C. Tobacco, ramie, rape, cotton
D:D. Sugar cane, oats, soybeans, peanuts
答案: A. Wheat, rice, corn, barley
13、 The crop growth analysis is a method according to the law of crops.
A:A. Spike differentiation and flower bud differentiation
B:B. Dry matter accumulation and leaf area formation
C:C. Quality formation
D:D. Yield formation
答案: B. Dry matter accumulation and leaf area formation
14、 Late-maturing varieties have fewer leaves than early-maturing varieties.
A:正确
B:错误
答案: 错误
15、 The minimum temperature for seed germination for both wheat and rice have the same requirements.
A:正确
B:错误
答案: 错误
16、 The influence of crops on the soil is dual, that is, it consumes soil nutrients on the one hand and destroys the soil structure on the other.
A:正确
B:错误
答案: 错误
17、 Dormancy is an adaptation of crops to a stress environment.
A:正确
B:错误
答案: 正确
18、 The assimilation transportation capacity of C4 crop is higher than that of C3 crop.
A:正确
B:错误
答案: 正确
19、 Leaves are the only organ for photosynthesis.
A:正确
B:错误
答案: 错误
20、 Cereal crops generally have tillering characteristics.
A:正确
B:错误
答案: 错误
21、 Maintaining a high root-shoot ratio throughout the life history of crops is the basis for high yield and quality.
A:正确
B:错误
答案: 正确
22、 The high-yielding crop population structure requires the larger storage capacity.
A:正确
B:错误
答案: 错误
作业Chapter 2 Plant growth development and regulations Chapter 2 Week 2 Unit homework
1、 1. How to applicate the temperature and light response characteristics of crops in field production?
评分规则: 1. How to applicate the temperature and light response characteristics of crops in field production?
2、 2. What is the relationship between vegetative growth and reproductive growth?
评分规则: 2. What is the relationship between vegetative growth and reproductive growth?
3、 3. What is the relationship between aboveground growth and underground growth?
评分规则: 3. What is the relationship between aboveground growth and underground growth?
4、 4. What are the factors affecting tillering?
评分规则: 4. What are the factors affecting tillering?
Chapter 3 Formation of crop yield and quality Chapter 3 Week 3 Unit test
1、 The proportion of economic yield in bio-yield, namely the efficiency of bio-yield transforming into economic yield, is defined as __or____.
A:A.harvesting index
B:B.economic index
C:C.yield index
D:D.quality index
答案: A.harvesting index;
B.economic index
2、 The yield components of cereal crop = __ ×_ × ___
A:A.plant height
B:B.spike number
C:C.seeds per spike
D:D.weight per seed
答案: B.spike number ;
C.seeds per spike;
D.weight per seed
3、 Photosynthetic capacity of crops is closely related to __,_ and ___.
A:A.photosynthetic area,
B:B.photosynthetically active radiation
C:C.photosynthetic duration
D:D.photosynthetic efficiency
答案: A.photosynthetic area,;
C.photosynthetic duration;
D.photosynthetic efficiency
4、 The dry matter accumulation of crops follows the logistic curve pattern, which go through __、_、and___.
A:A.slow growth period
B:B.exponential growth period
C:C.linear growth period
D:D.saturation period
答案: A.slow growth period;
B.exponential growth period;
C.linear growth period;
D.saturation period
5、 Formation and function of ‘Source-Path-Sink’ are not performed in isolation, they are __, _ and sometimes ___for each other.
A:A.interrelated
B:B.reinforcing
C:C.independent
D:D.substitute
答案: A.interrelated;
B.reinforcing;
D.substitute
6、 __, _ and ___ are important guarantees for high yield of crops according to the theory of ‘Source-Path-Sink’
A:A.Sufficient source
B:B.large sink
C:C.more path
D:D.smooth path
答案: A.Sufficient source;
B.large sink;
D.smooth path
7、 The yield gap is the difference between __ and ____.
A:A.Actual yield
B:B.Potential yield
C:C.Yield potential
D:D.Maximum yield
答案: A.Actual yield;
B.Potential yield
8、 For any given site and growing season, yield potential is determined by three factors: __, _, and ___.
A:A.solar adiation
B:B.temperature
C:C.water supply
D:D.farmer
答案: A.solar adiation;
B.temperature;
C.water supply
9、 The quality of grain crops can be summarized as__, _, and ___.
A:A.nutritional quality
B:B.edible quality
C:C.processing quality
D:D.commodity quality
答案: A.nutritional quality;
B.edible quality;
C.processing quality;
D.commodity quality
10、 commodity quality refers to the appearance and packaging of agricultural products, such as__, _, and ___.
A:A.form
B:B.colour and lustre
C:C.uniformity
D:D.chemical pollution
答案: A.form;
B.colour and lustre;
C.uniformity;
D.chemical pollution
11、 Factors affecting crop quality are complex.It is mainly influenced by _, _, and ___.
A:A.genetic control
B:B.climatic factor
C:C.cultivation measures
D:D.ecological factor
答案: A.genetic control;
B.climatic factor;
C.cultivation measures;
D.ecological factor
12、 Good cultivation technique is an important way to improve product quality, it contains five measures: _, , __, _____ and Timely harvest
A:A.Rational rotation
B:B.Rational crop density
C:C.Scientific fertilization
D:D.Timely irrigation and drainage
答案: A.Rational rotation;
B.Rational crop density;
C.Scientific fertilization;
D.Timely irrigation and drainage
13、 Bio-yield does not contain root system.
A:正确
B:错误
答案: 错误
14、 In general, the economic index of crops for harvesting vegetative organs is higher than that of crops for harvesting grains
A:正确
B:错误
答案: 正确
15、 The yield components are difficult for growing in the same time, there is usually a negative correlation with each other.
A:正确
B:错误
答案: 正确
16、 When crop individuals and population develop harmoniously, crop yield can be increased
A:正确
B:错误
答案: 正确
17、 The storage capacity of cereal grain depends on the duration and rate of filling stage.
A:正确
B:错误
答案: 正确
18、 The transport route of assimilate is phloem, and phloem parenchyma cells are the main tissue for transport of assimilate.
A:正确
B:错误
答案: 正确
19、 In the broadest sense, it is thought that the source-sink relationship is impacted by the environment which drives source activity (photosynthesis) and consequently increases sink activity (tissue growth and storage).
A:正确
B:错误
答案: 正确
20、 Transfer of materials from source to sink is independent of the signaling network.
A:正确
B:错误
答案: 错误
21、 Yield potential is defined as the yield of a cultivar when grown in environments to which it is adapted, with nutrients and water non-limiting and with pests, diseases, weeds, lodging, and other stresses effectively controlled.
A:正确
B:错误
答案: 正确
22、 potential yield is defined as as the maximum yield which could be reached by a crop in given environments, as determined, for example, by simulation models with plausible physiological and agronomic assumptions.
A:正确
B:错误
答案: 正确
23、 Processing quality is related to processing technology, but regardless of the quality of agricultural products.
A:正确
B:错误
答案: 错误
24、 The quality of a crop product depends on the formed specific substance, such as the quantity and quality of stored proteins, fats, starches, sugars, fibers and special synthetic products such as tannins, alkaloids, terpenoids, etc,
A:正确
B:错误
答案: 正确
25、 The rapid accumulation of oil in soybean seeds was earlier than that of protein
A:正确
B:错误
答案: 正确
26、 During the soybean pod stage, the content of non-protein nitrogen in the seed decreased gradually, while the percentage of protein nitrogen increased gradually. The percentage of protein nitrogen still increased after leaf senescence.
A:正确
B:错误
答案: 正确
27、 General observed on most crops, high compositions, especially high contents of protein, fat, lysine, etc. is difficult to combine with high yield
A:正确
B:错误
答案: 正确
28、 When the amount of glucose produced by photosynthesis is equal, crops with starch-based grains must produce higher yields than those with protein and fat as main components.
A:正确
B:错误
答案: 正确
29、 The relationship between yield and protein content is linear
A:正确
B:错误
答案: 错误
30、 Reasonable cultivation measures and suitable ecological environment are often conducive to improving both yield and quality
A:正确
B:错误
答案: 正确
作业Chapter 3 Formation of crop yield and quality Chapter 3 Week 3 Unit homework
1、 1.Please use the theory of ‘Source-Path-Sink’ to explain the main causes of low crop yield
评分规则: 1.Please use the theory of ‘Source-Path-Sink’ to explain the main causes of low crop yield
2、 2.How to improve the light utility efficiency?
评分规则: 2.How to improve the light utility efficiency?
3、 3.What are the Benefits of crop rotation
评分规则: 3.What are the Benefits of crop rotation
作业Chapter 4 The relationship between crops and the environment Chapter 4 Week 4 Unit homework
1、 1.Please talk about the relationship between crops and the environmental factors.
评分规则: 1.Please talk about the relationship between crops and the environmental factors.
2、 2.Expounding the application of photomorphogenesis in agricultural production.
评分规则: 2.Expounding the application of photomorphogenesis in agricultural production.
3、 3.Please describe the effects of low temperature and freezing on plant cells.
评分规则: 3.Please describe the effects of low temperature and freezing on plant cells.
4、 4.Talk about the impact of CO2 on crop growth in combination with local production.
评分规则: 4.Talk about the impact of CO2 on crop growth in combination with local production.
Chapter 4 The relationship between crops and the environment Chapter 4 Week 4 Unit test
1、 Do Primary consumers feed on ___?
A:A.Producer
B:B.Consumers
C:C.Decomposers
D:D.Water
答案: A.Producer
2、 The range of wavelengths is called visible light. Visible light is usually defined as having wavelengths in the range of ___ nm.
A:A.300-500 nm
B:B.400-600 nm
C:C.500-700 nm
D:D.400-700 nm
答案: D.400-700 nm
3、 The optimum temperature for rice growth and development is ______.
A:A.15 C-18 C
B:B.25 C-30 C
C:C.31 C-37 C
D:D.40 C-50 C
答案: A.15 C-18 C
4、 In plants, CLE25 belongs to ___.
A:A.Sterols
B:B.Hormones
C:C.Peptide
D:D.Receptor kinase
答案: C.Peptide
5、 How do growth rates change when C3 plants response to elevated concentrations of carbon dioxide？
A:A.increase
B:B.decrease
C:C.constant
D:D.uncertain
答案: A.increase
6、 Which three elements are the main nutrients of the soil？
A:A.N, P, B
B:B.N, P, K
C:C.C, H, O
D:D.N, C, O
答案: B.N, P, K
7、 What are the abiotic component that affect the growth and development of crops?
A:A.Light
B:B.Temperature
C:C.Water
D:D.Water
E:E.Nutrition
答案: A.Light;
B.Temperature;
C.Water;
D.Water;
E.Nutrition
8、 Phytochrome is an important pigment that regulates photomorphogenic aspects of plant growth and development, such as ___.
A:A.seed germination
B:B.stem elongation
C:C.leaf expansion
D:D.cell death
答案: A.seed germination;
B.stem elongation;
C.leaf expansion
9、 The influence of heat stress on plant growth is reflected in ____ .
A:A.seedling death
B:B.damage fruit and fruit
C:C.germination rate decreased
D:D.increased ABA and reduced net assimilation
答案: B.damage fruit and fruit;
C.germination rate decreased;
D.increased ABA and reduced net assimilation
10、 Flooding can cause ___ problems.
A:A.Soil Hypoxia
B:B.Hypotropism
C:C.Increased ethylene hormone
D:D.Elongation of branches
答案: A.Soil Hypoxia;
B.Hypotropism;
C.Increased ethylene hormone;
D.Elongation of branches
11、 Which are impacts of air pollution on crops？
A:A.visible markings on the foliage
B:B.reduced growth and yield
C:C.premature death of the plant
D:D.
答案: A.visible markings on the foliage;
B.reduced growth and yield;
C.premature death of the plant
12、 What are the functions of soil？
A:A.Provides a habitat for organisms
B:B.Recycles waste products
C:C.Filters water
D:D. Serves as an engineering material
E:E.Provides a medium for plant growth
答案: A.Provides a habitat for organisms;
B.Recycles waste products;
C.Filters water;
D. Serves as an engineering material;
E.Provides a medium for plant growth
13、 What are the forms of allelopathy?
A:A.Weed on Crop
B:B.Weed on Weed
C:C.Crop on Weed
D:D.Crop on Crop
答案: A.Weed on Crop;
B.Weed on Weed;
C.Crop on Weed;
D.Crop on Crop
14、 What are the release ways of allelochemicals?
A:A.Leaching
B:B.Decomposition
C:C.Volatilization
D:D.Exudation
答案: A.Leaching;
B.Decomposition;
C.Volatilization;
D.Exudation
15、 Sunlight is necessary for photosynthesis.
A:正确
B:错误
答案: 正确
16、 Excessive light will result in the following problems: Scorching of leaves.
A:正确
B:错误
答案: 正确
17、 When plant cells are subjected to low temperature stress, protein conformation changes and protein complex instability occur, and then enzyme kinetics is reduced, resulting in photoinhibition and anthocyanin accumulation, impaired photosynthesis, as well as decreased enzyme and flux capacity, thereby promoting the reduction of reactive oxygen species and causing membrane leakage.
A:正确
B:错误
答案: 错误
18、 Water use efficiency refers to the ability of crops to produce biomass per unit of water discharged.
A:正确
B:错误
答案: 正确
19、 The more clay and organic matter a soil has, the lower its CEC will be, and the less nutrients it will retain.
A:正确
B:错误
答案: 错误
20、 Allelochemicals are a subset of secondary metabolites, which are required for metabolism (i.e. growth, development and reproduction) of the allelopathic organism.
A:正确
B:错误
答案: 错误
Chapter 5 Crop Cultivation Measures and Technology Chapter 5 Week 5 Unit test
1、 As seeding materials, the seeds must meet the seed quality requirements in terms of purity, clarity, and germination rate, the germination rate should not be less than ().
A:A.70%
B:B.80%
C:C.90%
D:D.100%
答案: C.90%
2、 Base fertilizer is also called ().
A:A.bottom fertilizer
B:B.seeding fertilizer
C:C.top dressing
D:D.foliage fertilizer
答案: A.bottom fertilizer
3、 Concentrated fertilization is applying fertilizers near the () of crops.
A:A.leaves
B:B.roots or seeds
C:C.pods
D:D.stems
答案: B.roots or seeds
4、 The transpiration coefficient for sorghum is between ().
A:A.100-200
B:B.200-300
C:C.200-400
D:D.300-400
答案: C.200-400
5、 Micro-irrigation is also known as ().
A:A.basin irrigation
B:B.infiltrating irrigation
C:C.trickle irrigation
D:D.spray irrigation
答案: C.trickle irrigation
6、 Crops such as rice, corn, sorghum, soybean, wheat. Generally, their seeds moisture content must control less than ().
A:A.10%
B:B.13%
C:C.15%
D:D.20%
答案: B.13%
7、 Plant growth retardants, which means compounds that inhibit cell division and elongation in the subapical regions of plants but have no effect on ().
A:A.leaf
B:B.apical meristem
C:C. pod
D:D.stem
答案: B.apical meristem
8、 Cropping pattern can be divided into () and continuous cropping according to the planting sequence in different years.
A:A.monoculture
B:B.intercropping
C:C.relay intercropping
D:D.rotation
答案: D.rotation
9、 If two harvest one year, the multiple crop index is ().
A:A.100%
B:B.150%
C:C.200%
D:D.300%
答案: C.200%
10、 Generally, the depth of rotary tillage is about ().
A:A.8-9 cm
B:B.10-12 cm
C:C.15-17 cm
D:D.18-20 cm
答案: B.10-12 cm
11、 Which factors affecting multiple cropping?
A:A.thermal conditions
B:B.water conditions
C:C. fertility
D:D.labor and mechanized factors
答案: A.thermal conditions;
B.water conditions;
C. fertility;
D.labor and mechanized factors
12、 Basic tillage includes several types, such as ().
A:A.ploughing
B:B.sub-soiling
C:C.rotary tillage
D:D.no tillage
答案: A.ploughing;
B.sub-soiling;
C.rotary tillage
13、 Top-soil tillage includes several different types, such as ().
A:A.harrow
B:B.dragging
C:C.inter-tillage
D:D.soil repression
答案: A.harrow ;
B.dragging;
C.inter-tillage;
D.soil repression
14、 In production, the main sowing methods are ().
A:A.broadcast
B:B.drill sowing
C:C.hole sowing
D:D.precision sowing
答案: A.broadcast;
B.drill sowing;
C.hole sowing;
D.precision sowing
15、 In agricultural production, how many kinds of fertilizers?
A:A.organic fertilizer
B:B.microbial fertilizer
C:C.bio-fertilizer
D:D.inorganic fertilizer
答案: A.organic fertilizer;
B.microbial fertilizer;
D.inorganic fertilizer
16、 Surface irrigation including several different ways, such as ().
A:A.border irrigation
B:B.furrow irrigation
C:C.membrane irrigation
D:D.submerged irrigation
答案: A.border irrigation ;
B.furrow irrigation;
C.membrane irrigation;
D.submerged irrigation
17、 Harvest ways depend on the crop types, including ().
A:A.mowing
B:B.Mechanical harvest
C:C. digging
D:D. picking
答案: A.mowing;
C. digging;
D. picking
18、 Plant hormones refer to substances produced by metabolism in the plant body，which can be transported to other parts for action and have special effects on plant growth and development at low concentrations, common types including ().
A:A.auxin
B:B.gibberellin, cytokinin
C:C.abscisic acid, ethylene
D:D.brassinolactone
答案: A.auxin ;
B.gibberellin, cytokinin ;
C.abscisic acid, ethylene ;
D.brassinolactone
19、 In production, except chemical control, manual control also has a good effect, manual control technology including ().
A:A.deep intertillage
B:B.suppression, field drying
C:C.cut the leaves, pinch
D:D.pruning
答案: A.deep intertillage ;
B.suppression, field drying ;
C.cut the leaves, pinch ;
D.pruning
20、 The chemical regulate technology including ().
A:A.plant endogenous hormone
B:B.plant growth regulator
C:C.plant growth retardant
D:D.plant regulator inhibitor
答案: B.plant growth regulator ;
C.plant growth retardant;
D.plant regulator inhibitor
21、 Multiple crop index is the percentage of annual total sowing areas divide by cultivated areas？
A:正确
B:错误
答案: 正确
22、 The difference between intercropping and relay intercropping lies in the length of co-growth period？
A:正确
B:错误
答案: 正确
23、 The key technologies of conservation tillage are minimum tillage and no tillage?
A:正确
B:错误
答案: 正确
24、 The antagonistic effect of nutrients is that the combined effect of two fertilizers is larger than the sum of the two single effects?
A:正确
B:错误
答案: 错误
25、 The period of maximum nutrient efficiency of crops means in the process of crop growth, there is a period when nutrients are needed, both in terms of absorption rate and absolute quantity and the effect of fertilization are the most obvious and the efficiency of yield increase is also the highest.
A:正确
B:错误
答案: 正确
26、 Waterduty refers to the total amount of irrigation water during the whole growth period of a crop per unit area?
A:正确
B:错误
答案: 正确
27、 In crop’s life, the period when crop need the most water is called the critical period for water demand.
A:正确
B:错误
答案: 错误
28、 Plant growth regulators refers to compounds artificially synthesized or extracted from outside that are applied to plants and cause changes in growth and development at low concentrations.
A:正确
B:错误
答案: 正确
29、 The main function of field drying is to change soil environment, promote root development, inhibit stem and leaf growth and control ineffective tillering.
A:正确
B:错误
答案: 正确
30、 The mechanical effects of tillage including：loose and broken soil, ploughing the tillage layer and mixed soil, level the ground, compacting the soil, furrow and ridge the soil.
A:正确
B:错误
答案: 正确
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