1. What are the different types of fisheries?
2. What is ‘apiculture’? Name a few products obtained from apiculture.
3. What are weeds and fertilizers?
4. What are the harmful effects of using excessive fertilizers?
5. What are the different ways of hybridisation?
6. What do you understand by organic farming?
7. Define one method of crop production ensuring high yield.
8. What are macro-nutrients?
9. Give points of difference between egg producing chicken and boiler producing chicken.
10. Name any two weeds.
11. How do efficiency of nutrients affect the crop?
12. Name two rabi and two kharif crops.
Answers
...
1
There are two main types of fisheries: Inland fisheries and marine fisheries.
2.
Defintion : Apiculture or bee keeping deals with artificial rearing of honey bees to obtain bee products. Bee products like honey, wax, pollen, bee venom and royal Jelly as well as for crop pollination.
3
Answer: weeds are the harmaful plants that grow along with crops and take all water and nutrients from the crop, and damage the crops. fertilizers are the chemical products which are used by farmers to enhance the soil fertility and to kill the weeds .
4 .
Some of the harm chemical fertilizers may cause include waterway pollution, chemical burn to crops, increased air pollution, acidification of the soil and mineral depletion of the soil.
5..
Types of Hybridization:
Hybridization may be of following types:
(i) Intra-varietal hybridization: ...
(ii) Inter-varietal or Intraspecific hybridization: ...
(iv) Interspecific hybridization or intragenric hybridization: ...
(v) Introgressive hybridization: ...
6
Organic farming is a method of farming using less or no amount of fertilizers, herbicides, pesticides etc. This method uses only organic matters like organic manures, farm-wastes. It uses blue green algae in preparation of bio fertilizers.
7
One of the method of crop production that ensures high yield is intercropping. This method is beneficial because more than two types of crops having different nutrient requirement can be grown in a definite pattern of land. Intercropping helps in preventing pests and avoid the spread of diseases throughout the field. So with crop rotation, soil fertility is increased, reduces soil erosion is reduced, and soil depletion is prevented.
8
Macronutrients are the nutrients we need in larger quantities that provide us with energy: in other words, fat, protein and carbohydrate. Micronutrients are mostly vitamins and minerals, and are equally important but consumed in ver , and fats.
9
An egg laying poultry is called egger or layer whereas broilers are reared for obtaining meat. So a layer should be able to produce more number of large sized eggs, without growing too much. On the other hand, a broiler should yield more meat and hence should be able to grow well.
10 .
The two common weeds are Amaranth and Taraxacum officinale.
11
The adequate supply of nutrients contributes significantly to increasing crop yield as well as cost of production. In this situation, optimizing nutrient use efficiency is fundamental for higher crop productivity and reduced cost of production.
12.
The kharif crops include rice, maize, sorghum, pearl millet/bajra, finger millet/ragi (cereals), arhar (pulses), soyabean, groundnut (oilseeds), cotton etc. The rabi crops include wheat, barley, oats (cereals), chickpea/gram (pulses), linseed, mustard (oilseeds) etc.
ok like follow
Hii...❣️
1. There are two main types of fisheries: Inland fisheries and marine fisheries.
2. Apiculture or bee keeping deals with artificial rearing of honey bees to obtain bee products. Bee products like honey, wax, pollen, bee venom and royal Jelly as well as for crop pollination.
3. weeds are the harmaful plants that grow along with crops and take all water and nutrients from the crop, and damage the crops. fertilizers are the chemical products which are used by farmers to enhance the soil fertility and to kill the weeds .
4. To grow, plants require nitrogen compounds from the soil, which can be produced naturally or be provided by fertilizers. However, applying excessive amounts of fertilizer leads to the release of harmful greenhouse gases into the atmosphere and the eutrophication of our waterways.
5. In chemistry, orbital hybridisation (or hybridization) is the concept of mixing atomic orbitals into new hybrid orbitals (with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory.
6. Organic farming is a method of crop and livestock production that involves much more than choosing not to use pesticides, fertilizers, genetically modified organisms, antibiotics and growth hormones , provide attentive care that promotes the health and meets the behavioural needs of livestock.
7. Intercropping helps in preventing pests and avoid the spread of diseases throughout the field. So with crop rotation, soil fertility is increased, reduces soil erosion is reduced, and soil depletion is prevented.
8. Carbohydrates, fat and protein are called macronutrients. They are the nutrients you use in the largest amounts. “Macronutrients are the nutritive components of food that the body needs for energy and to maintain the body's structure and systems,” says MD Anderson Wellness Dietitian Lindsey Wohlford.
9. An egg laying poultry is called egger or layer whereas broilers are reared for obtaining meat. So a layer should be able to produce more number of large sized eggs, without growing too much. On the other hand, a broiler should yield more meat and hence should be able to grow well.
10. The two common weeds are Amaranth and Taraxacum officinale. It is important to remove weeds from the fields because they rob soil moisture and nutrients from the crop and decrease harvest efficiencies. Weeds also compete with the crop for sunlight because they are competing to survive in a limited space.
11. The adequate supply of nutrients contributes significantly to increasing crop yield as well as cost of production. In this situation, optimizing nutrient use efficiency is fundamental for higher crop productivity and reduced cost of production.
12. The kharif crops include rice, maize, sorghum, pearl millet/bajra, finger millet/ragi (cereals), arhar (pulses), soyabean, groundnut (oilseeds), cotton etc. The rabi crops include wheat, barley, oats (cereals), chickpea/gram (pulses), linseed, mustard (oilseeds) etc.