\n| 4. Rich with microbes nutrients and do not pollute the soil.<\/td>\n | 4. Rich with phosphorous potassium and pollute the soil.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Question 7.
\nWhich of the following conditions will give the most benefits? Why?
\na) Farmers use high-quality seeds, do not adopt irrigation or use fertilizers.
\nb) Farmers use ordinary seeds, adopt irrigation and use fertilizers.
\nc) Farmers use quality seeds, adopt irrigation, use fertilizer and use crop protection measures.
\nAnswer:
\n(c) This condition will give the most benefits. Because it includes all agricultural methods. Hence yield is more.<\/p>\n Question 8.
\nWhy should preventive measures and biological control methods be preferred for protecting crops?
\nAnswer:
\nBecause insects, rodents, fungi, miles and bacteria, moisture and temperature cause degradation in quality, loss in weight, poor germinability, discolouration of produce, all leading to poor marketability of crops. Therefore By preventive measures and biological control methods crops should be protected.<\/p>\n Question 9.
\nWhat factors may be responsible for losses of grains during storage?
\nAnswer:
\nMoisture and temperature are the factors which are responsible for losses of grains during storage.<\/p>\n Question 10.
\nWhich method is commonly used for improving cattle breeds and why?
\nAnswer:
\nExotic or foreign breeds (eg: Jersey) are selected for long lactation periods, while local breeds (eg: Red sindhi) show excellent resistance to diseases. The two can be cross-breed to get animals with both the desired qualities.<\/p>\n Question 11.
\nDiscuss the implications of the following statement:
\n“It is interesting to note that poultry is India’s most efficient converter of low fiber foodstuff (which is unfit for human consumption) into highly nutritious animal protein food.”
\nAnswer:
\nThis statement is correct. The rotation (daily food requirement) for broilers is protein-rich with adequate fat. The level of vitamins A and K is kept high in the poultry feeds.<\/p>\n Question 12.
\nWhat management practices are common in dairy and poultry farming?
\nAnswer:
\nBroiler chickens are fed with vitamin-rich supplementary feed for good growth rate and better feed efficiency. Care is taken to avoid mortality and to maintain feathering and carcass quality. They are produced as broilers and sent to the market for meat purposes.<\/p>\n For the good production of poultry birds, good management practices are important. These include maintenance of temperature and hygienic conditions in housing and poultry feed, as well as prevention and control of diseases and pests. The ration (daily food requirement) for broilers is protein-rich with adequate fat. The level of vitamins A and K is kept high in the poultry feeds.<\/p>\n Question 13.
\nWhat are the differences between broilers and layers and in their management?
\nAnswer:<\/p>\n \n\n\nBroilers<\/strong><\/td>\nLayers<\/strong><\/td>\n<\/tr>\n\n| These provide a good quality of meat.<\/td>\n | These are producing good quality of eggs.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n The housing, nutritional and environmental requirements of broilers are somewhat different from those of egg layers. The ration (daily food requirement) for broilers is protein-rich with adequate fat. The level of vitamins A and K is kept in the poultry feeds.<\/p>\n Question 14.
\nHow are fish obtained?
\nAnswer :
\nThere are two ways of obtaining fish, one is from natural resources, which is called capture fishing. The other way is by fish farming which is called culture fishery.<\/p>\n Question 15.
\nWhat are the advantages of composite fish culture?
\nAnswer:<\/p>\n \n- By composite fish culture, the food available in all the parts of the pond is used.<\/li>\n
- This increases the fish yield from the pond.
\nThese are the advantages of composite fish culture.<\/li>\n<\/ol>\nQuestion 16.
\nWhat are the desirable characters of bee varieties suitable for honey production?
\nAnswer:
\nThe value or quality of honey depends upon the pasturage, or the flowers available to the bees for nectar and pollen collection. In addition to an adequate quantity of pasturage, the kind of flowers available will determine the taste of the honey.<\/p>\n Question 17.
\nWhat is pasturage and how is it related to honey production?
\nAnswer:
\nVarieties of plants, trees belonging to different species altogether are called pasturage. It should be rich in the environment for obtaining good quality of honey. Because the value or quality of honey depends upon the pasturage, or the flowers available to the bees for nectar and pollen collection. In addition to an adequate quantity of pasturage, the kind of flowers available will determine the taste of the honey.<\/p>\n KSEEB Solutions for Class 9 Science Chapter 15 Textbook Exercises<\/h3>\nQuestion 1.
\nExplain any one method of crop production which ensures high yield.
\nAnswer:
\nInter-cropping is growing two or more crops simultaneously on the same field in a definite pattern. A few rows of one crop alternate with a few rows of second crop, for example, soyabean+maize, or finger millet (bajra) + cowpea (lobia). The crops are selected such that their nutrient requirements are different. This ensures maximum utilization of the nutrients supplied and also prevents pests and diseases from spreading to all the plants belonging to one crop in a field. This way both crops can give better returns.<\/p>\n Question 2.
\nWhy are manure and fertilizers used in fields?
\nAnswer:
\nFertilizers supply nitrogen, phosphorus and potassium. They are used to ensure good vegetative growth (leaves, branches and flowers) giving rise to healthy plants. Fertilizers are a factor in the higher yields of high-cost farming. Soil fertility is maintained properly by the application of fertilizers.<\/p>\n Question 3.
\nWhat are the advantages of intercropping and crop rotation?
\nAnswer:<\/p>\n \n- Intercropping:<\/strong> In this method, the crops are selected such that their nutrient requirements are different. This ensures maximum utilisation of nutrients supplied and also prevent pests and diseases from spreading to all the plants belonging to one crop in a field. This way both crops can give better returns.<\/li>\n
- Crop rotation:<\/strong> The growing of different crops on a piece of land in a preplanned succession is known as crop rotation. If crop rotation is done properly then two or three crops can be grown in a year with a good harvest.<\/li>\n<\/ol>\n
Question 4.
\nWhat is genetic manipulation? How is it useful in agricultural practices?
\nAnswer:
\nThe desirable characteristics of the crop can be genetically modified to establish progeny.
\n(a) Resources can be conserved.
\n(b) Period of yield can be maintained,
\n(c) Availability of crop of all seasons . can be produced and maintained<\/p>\n Question 5.
\nHow do storage grain losses occur?
\nAnswer:
\nStorage losses in agricultural produce can be very high. Factors responsible for such losses are biotic- insects, fungi, mites and bacteria, and abiotic – inappropriate, moisture, and temperatures in the place of storage. These factors cause degradation in quality, loss in weight, poor germinability, discolouration of produce.<\/p>\n Question 6.
\nHow do good animal husbandry practices benefit farmers?
\nAnswer:
\nAnimal-based farming includes cattle, goat, sheep, poultry and fish farming. As the population increases and as living standards increase, the demand for milk, eggs and meat is also going up. Also the growing awareness of the need for the humane treatment of livestock has brought in new limitations in livestock farming.<\/p>\n Cattle husbandry is done for two purposes – milk and draught labour for agricultural work such as tilling, irrigation and carting. Milk-producing females are called milch animals (dairy animals) while the ones used form labour are called draught animals.<\/p>\n Question 7.
\nWhat are the benefits of cattle farming?
\nAnswer:
\nCattle husbandry is done for two purposes – milk and draugt labour for agricultural work such as tilling, irrigation and carting. Milk producing females are called milch animals (dairy animals), while the ones used for farm labour are called draught animals. These are the benefits of cattle farming.<\/p>\n Question 8.
\nFor increasing production, what is common in poultry, fisheries and bee-keeping?
\nAnswer:
\nFor increasing production of all these there should be proper cleaning, sanitation and spraying of disinfectants are regular intervals. Appropriate vaccination can prevent the occurrence of infectious diseases.<\/p>\n Question 9.
\nHow do you differentiate between capture fishing, mariculture and aquaculture?
\nAnswer:<\/p>\n \n- Capture fishing:<\/strong> Capture fishing is also done in such inland water bodies, the yield is not high.<\/li>\n
- Mari-culture fishing:<\/strong> Marine fish are caught using many minds of fishing nets from fishing boats. Yield are increased by locating large schools of fish in the open sea using satellites and echo-sounders.<\/li>\n
- Aquaculture:<\/strong> Aquaculture is a method of fishing in ponds, canals, dams and rivers. In this method yield is less.<\/li>\n<\/ol>\n
KSEEB Solutions for Class 9 Science Chapter 15 Additional Questions and Answers<\/h3>\nI. Answer the following questions:<\/p>\n Question 1.
\nName the major groups of activities for improving crop yields.
\nAnswer:<\/p>\n \n- Crop variety improvement.<\/li>\n
- Crop production improvement.<\/li>\n
- Crop protection and management.<\/li>\n<\/ol>\n
Question 2.
\nHow is soil fertility is maintained to get higher yield?
\nAnswer:
\nBy using compost manure vermicompost and green manure we can maintain soil fertility. We get the maximum yield.<\/p>\n Question 3.
\nWhat do you mean by intercropping?
\nAnswer:
\nInter-cropping is growing two or more crops simultaneously on the same field in a definite pattern.<\/p>\n Question 4.
\nWhat are the weeds? Give examples.
\nAnswer:
\nWeeds are unwanted plants which are grown on along with crops.
\nEg: Xanthium, parthenium, etc.<\/p>\n Question 5.
\nName two processes of obtaining fish.
\nAnswer:<\/p>\n \n- From natural process.<\/li>\n
- By fish farming which is called culture fishery.<\/li>\n<\/ol>\n
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