Desirable characteristics can be incorporated in a crop variety by two methods: (i) Hybridization. This is a genetical technique. This method involves crossing of the selected plants having one or more of the desirable characteristics (ii) Genetic engineering. Introduction of desirable characteristiRead more
Desirable characteristics can be incorporated in a crop variety by two methods:
(i) Hybridization. This is a genetical technique. This method involves crossing of the selected plants having one or more of the desirable characteristics
(ii) Genetic engineering. Introduction of desirable characteristics with the help of techniques available in biotechnology.
Major problem of fishery (or fish farming). It is procurement of pure seeds 9f high quality fish. This problem his been solved through hypophysation or hormonal treatment of selected fishes in breeding hapas.
Major problem of fishery (or fish farming). It is procurement of pure seeds 9f high quality fish. This problem his been solved through hypophysation or hormonal treatment of selected fishes in breeding hapas.
The two ways of obtaining fish are (i) Capture fishery. Fish is caught from natural waters both marine as well as inland (freshwater bodies). (ii) Culture fishery. Fish is grown in water bodies through human efforts. The mature fish is harvested.
The two ways of obtaining fish are
(i) Capture fishery. Fish is caught from natural waters both marine as well as inland (freshwater bodies).
(ii) Culture fishery. Fish is grown in water bodies through human efforts. The mature fish is harvested.
Indian poultry breed - Aseel Foreign poultry breed - Loghorn. Desirable trait after cross breeding - Better quantity and quality of eggs and meat with good tolerance of local conditions.
Indian poultry breed – Aseel
Foreign poultry breed – Loghorn.
Desirable trait after cross breeding – Better quantity and quality of eggs and meat with good tolerance of local conditions.
Larger sized birds require more feed. Summer adaptation is connected with egg laying. Little summer adaptation reduces egg laying. In order to get small-sized poultry birds having summer adaptability, it is desirable to (i) Either introduce the required exotic birds from outside and (ii) Cross breedRead more
Larger sized birds require more feed. Summer adaptation is connected with egg laying. Little summer adaptation reduces egg laying. In order to get small-sized poultry birds having summer adaptability, it is desirable to (i) Either introduce the required exotic birds from outside and (ii) Cross breed the local birds with exotic birds from outside. Small sized poultry birds are preferred for (a)’Lower requirement of feed (b) Higher egg laying capacity; (c) Lower requirement for space.
Pesticides are -very toxic substances, they should not be used indiscriminately. Only very accurate dose should-be applied at appropriate time. Even slight excess of the pesticides is extremely harmful. (i) Pesticides are harmful to soil biota. Therefore, they reduce soil fertility. (ii) They pass iRead more
Pesticides are -very toxic substances, they should not be used indiscriminately. Only very accurate dose
should-be applied at appropriate time. Even slight excess of the pesticides is extremely harmful.
(i) Pesticides are harmful to soil biota. Therefore, they reduce soil fertility.
(ii) They pass into ground water and make it toxic.
(iii) They enter the crop plants and make their products (leaves, stem, flowers, fruits and seeds) toxic.
(iv) Pesticides pass into surface water through run off form sprayed fields and harm the aquatic biota.
Merits. 1. Economically important desired fishes are made available. 2. A large number of fishes are raised in a small area. 3. Fishes are made to breed in different seasons. 4. There is a little mortality in the younger stages of the fishes. 5. Through selective hybridisation, yield and quality ofRead more
Merits. 1. Economically important desired fishes are made available.
2. A large number of fishes are raised in a small area.
3. Fishes are made to breed in different seasons.
4. There is a little mortality in the younger stages of the fishes.
5. Through selective hybridisation, yield and quality of fishes are improved.
demerits1. Only some selected high yielding and economically important breeds are reared.
2′ Fish culture is a threat.to biodiversity, since other forms of aquatic organisms are being ignored. Even natural waters are-being seeded with economically important fishes; this too is affecting the natural biodiversity of the water bodies.
In agriculture, higher yield can be obtained only by applying higher yielding varieties, improved farming practices modern technology, latest agricultural machines and implements, nutrient supply, etc. All these require high cost and knowledge of new techniques and improvements. Therefore, a farmer'Read more
In agriculture, higher yield can be obtained only by applying higher yielding varieties, improved farming practices modern technology, latest agricultural machines and implements, nutrient supply, etc. All these require high cost and knowledge of new techniques and improvements. Therefore, a farmer’s purchasing capacity for inputs determines the cropping system and production exercises.
Compost:- 1. it is prepared from all types of organic remains garbage, sewage, sludge, animal refuse, farm waste, straw, uprooted weeds, etc. 2. Organic remains are decomposed by released enzymes of the microorganisms. 3. It takes 3 to 6 months to prepare. Vermicompost:- 1. It is prepared from domesRead more
Compost:-
1. it is prepared from all types of organic remains garbage, sewage, sludge, animal refuse, farm
waste, straw, uprooted weeds, etc.
2. Organic remains are decomposed by released enzymes of the microorganisms.
3. It takes 3 to 6 months to prepare.
Vermicompost:-
1. It is prepared from domestic waste, vegetable waste, uprooted weeds and farm refuse.
2. Organic remains are fed by earthworms and in pulverized state.
3. It takes 1 to 2 months to preare
All crops do not grow under similar conditions. Some require high temperature, some low temperature, longer duration of sunlight, shorter duration of sunlight, more humidity, low humidity, moderate humidity, loam soil, sandy soil, etc. Apple cannot be gror.tn in plains because it requires several daRead more
All crops do not grow under similar conditions. Some require high temperature, some low temperature, longer duration of sunlight, shorter duration of sunlight, more humidity, low humidity, moderate humidity, loam soil, sandy soil, etc. Apple cannot be gror.tn in plains because it requires several days of low temperature. In plains, there are two major seasons of crop plants: kharif (rainy season) and rabi (winter season).
Discuss two ways of incorporating desirable characteristics into crop varieties.
Desirable characteristics can be incorporated in a crop variety by two methods: (i) Hybridization. This is a genetical technique. This method involves crossing of the selected plants having one or more of the desirable characteristics (ii) Genetic engineering. Introduction of desirable characteristiRead more
Desirable characteristics can be incorporated in a crop variety by two methods:
See less(i) Hybridization. This is a genetical technique. This method involves crossing of the selected plants having one or more of the desirable characteristics
(ii) Genetic engineering. Introduction of desirable characteristics with the help of techniques available in biotechnology.
what is the major problem faced in fish farming? How can it be overcome.
Major problem of fishery (or fish farming). It is procurement of pure seeds 9f high quality fish. This problem his been solved through hypophysation or hormonal treatment of selected fishes in breeding hapas.
Major problem of fishery (or fish farming). It is procurement of pure seeds 9f high quality fish. This problem his been solved through hypophysation or hormonal treatment of selected fishes in breeding hapas.
See lessWhat are the two ways of obtaining fish?
The two ways of obtaining fish are (i) Capture fishery. Fish is caught from natural waters both marine as well as inland (freshwater bodies). (ii) Culture fishery. Fish is grown in water bodies through human efforts. The mature fish is harvested.
The two ways of obtaining fish are
See less(i) Capture fishery. Fish is caught from natural waters both marine as well as inland (freshwater bodies).
(ii) Culture fishery. Fish is grown in water bodies through human efforts. The mature fish is harvested.
Give one example of an Indian and foreign poultry breed which when crossed produce an improved variety. List any one desirable trait expected from such cross breeding.
Indian poultry breed - Aseel Foreign poultry breed - Loghorn. Desirable trait after cross breeding - Better quantity and quality of eggs and meat with good tolerance of local conditions.
Indian poultry breed – Aseel
See lessForeign poultry breed – Loghorn.
Desirable trait after cross breeding – Better quantity and quality of eggs and meat with good tolerance of local conditions.
What would happen if poultry birds are larger in size and have no summer adaptation capacity? In order to get small sized poultry birds having summer adaptability, what methods will be employed?
Larger sized birds require more feed. Summer adaptation is connected with egg laying. Little summer adaptation reduces egg laying. In order to get small-sized poultry birds having summer adaptability, it is desirable to (i) Either introduce the required exotic birds from outside and (ii) Cross breedRead more
Larger sized birds require more feed. Summer adaptation is connected with egg laying. Little summer adaptation reduces egg laying. In order to get small-sized poultry birds having summer adaptability, it is desirable to (i) Either introduce the required exotic birds from outside and (ii) Cross breed the local birds with exotic birds from outside. Small sized poultry birds are preferred for (a)’Lower requirement of feed (b) Higher egg laying capacity; (c) Lower requirement for space.
See lessDiscuss why the pesticides are used in very accurate concentration and at very appropriate time.
Pesticides are -very toxic substances, they should not be used indiscriminately. Only very accurate dose should-be applied at appropriate time. Even slight excess of the pesticides is extremely harmful. (i) Pesticides are harmful to soil biota. Therefore, they reduce soil fertility. (ii) They pass iRead more
Pesticides are -very toxic substances, they should not be used indiscriminately. Only very accurate dose
See lessshould-be applied at appropriate time. Even slight excess of the pesticides is extremely harmful.
(i) Pesticides are harmful to soil biota. Therefore, they reduce soil fertility.
(ii) They pass into ground water and make it toxic.
(iii) They enter the crop plants and make their products (leaves, stem, flowers, fruits and seeds) toxic.
(iv) Pesticides pass into surface water through run off form sprayed fields and harm the aquatic biota.
Give merits and demerits of fish culture.
Merits. 1. Economically important desired fishes are made available. 2. A large number of fishes are raised in a small area. 3. Fishes are made to breed in different seasons. 4. There is a little mortality in the younger stages of the fishes. 5. Through selective hybridisation, yield and quality ofRead more
Merits. 1. Economically important desired fishes are made available.
See less2. A large number of fishes are raised in a small area.
3. Fishes are made to breed in different seasons.
4. There is a little mortality in the younger stages of the fishes.
5. Through selective hybridisation, yield and quality of fishes are improved.
demerits1. Only some selected high yielding and economically important breeds are reared.
2′ Fish culture is a threat.to biodiversity, since other forms of aquatic organisms are being ignored. Even natural waters are-being seeded with economically important fishes; this too is affecting the natural biodiversity of the water bodies.
In agriculture practices, higher input gives higher yield. Discuss how?
In agriculture, higher yield can be obtained only by applying higher yielding varieties, improved farming practices modern technology, latest agricultural machines and implements, nutrient supply, etc. All these require high cost and knowledge of new techniques and improvements. Therefore, a farmer'Read more
In agriculture, higher yield can be obtained only by applying higher yielding varieties, improved farming practices modern technology, latest agricultural machines and implements, nutrient supply, etc. All these require high cost and knowledge of new techniques and improvements. Therefore, a farmer’s purchasing capacity for inputs determines the cropping system and production exercises.
See lessDifferentiate between compost and Vermicompost.
Compost:- 1. it is prepared from all types of organic remains garbage, sewage, sludge, animal refuse, farm waste, straw, uprooted weeds, etc. 2. Organic remains are decomposed by released enzymes of the microorganisms. 3. It takes 3 to 6 months to prepare. Vermicompost:- 1. It is prepared from domesRead more
Compost:-
See less1. it is prepared from all types of organic remains garbage, sewage, sludge, animal refuse, farm
waste, straw, uprooted weeds, etc.
2. Organic remains are decomposed by released enzymes of the microorganisms.
3. It takes 3 to 6 months to prepare.
Vermicompost:-
1. It is prepared from domestic waste, vegetable waste, uprooted weeds and farm refuse.
2. Organic remains are fed by earthworms and in pulverized state.
3. It takes 1 to 2 months to preare
Cultivation practices and crop yield are related to environmental conditions. Explain.
All crops do not grow under similar conditions. Some require high temperature, some low temperature, longer duration of sunlight, shorter duration of sunlight, more humidity, low humidity, moderate humidity, loam soil, sandy soil, etc. Apple cannot be gror.tn in plains because it requires several daRead more
All crops do not grow under similar conditions. Some require high temperature, some low temperature, longer duration of sunlight, shorter duration of sunlight, more humidity, low humidity, moderate humidity, loam soil, sandy soil, etc. Apple cannot be gror.tn in plains because it requires several days of low temperature. In plains, there are two major seasons of crop plants: kharif (rainy season) and rabi (winter season).
See less