disadvantages of fertilizers class 8
The process of cutting and gathering mature crops from the field with sickle is called harvesting. NCERT Solutions for Class 8 Social Science Geography Chapter 4 Agriculture. Question: What would happen if wheat is sown in the kharif season? Disadvantage of this method is that it leads to unequal distribution of seeds and thereby reduces crop yield.  Answer: Silos is a large-scale storage facility for grains to protect them from pests and rats. It is the method in which weeding is done by hands. It should not be dormant and it means the seeds which is not converted into plant. This process is called nitrification. Water is pulled out from the well and directly supplied to the plants. It is defined as mixing of soil with manure. Differentiate between sprinkler and drip irrigation. Question: What is the difference between fertilizers and manure? Write a brief note on âAnimal Husbandryâ. For example: Insects, bacteria etc. } It should always be new, without cracks etc. Weeds can be removed by uprooting or cutting them close to the ground, from time to time. It is the process by which nitrogen is converted to its various chemical forms. It is a process of growing crops on a large scale. These are often harmful to the soil food web. It enables a better-balanced diet throughout the year. The crops can be protected from weeds, pests etc. When the soil is ready, the farmers sow the seeds. You will not be allowed to write during the first 15 minutes. Organic manures have acids that dissolve the nutrients with soil and make it available to the plants. What measures are taken to keep silos free from rodent infestation? A drip irrigation system carries water directly to the base of each individual plant. (i) What is agriculture? For example: Amaranthus, grass, wild oats. The different methods of harvesting are as follows –. For example: silos. It is an ideal watering method. The crops in the field are exposed to many factors.The crop plants may be destroyed by insects, birds, rats etc. Hence, it requires cold climatic conditions to be grown properly. Crops with different maturation period are chosen. Crop Production and Management Class 8 Science Chapter 1 as per NCERT Book used in CBSE and other Schools. Class 8 Geography Chapter 4 Agriculture Ncert Textbook Questions Solved. Milch Animals: These are the animals which gives milk. Select the correct answer and click on the âFinishâ buttonCheck your score and answers at the end of the quiz, Visit BYJUâS for all Biology related queries and study materials, Your email address will not be published. Question: Match items in column A with those in column B. These act as manure for the soil. Crop rotation is a practice of growing two or more dissimilar crops in the same field one after the other. They increase the nutrient content of the soil. This time is to be spent in reading the question paper. For example: Lady finger, cabbage, peas, capsicum, cauliflower. ), vegetable crops (potatoes, cabbages, etc. Question 1. If decomposition can be done in the presence of earth worm, it is known as vermicompost. These improve the physical condition of the soil. By this method, pest will not spread and easy to harvest. Click âStart Quizâ to begin! Question: What are weeds? As animals are serving various purposes, so there is a need to take care of them. For example: NPK (Nitrogen Phosphorous Potassium), ammonium sulphate, ammonium phosphate etc. This is done with the help of a plough. Manure adds nutrients to the soil without affecting its fertility. It does not provide any humus to the soil. This type of experimental design is sometimes called independent measures design because each participant is assigned to only one treatment group.For example, you might be testing a new depression medication: one group receives the actual medication and the other receives a … However, these are chemicals, and they have the potential to decrease the fertility of soil if used constantly. This is the efficient method for practicing agriculture. If decomposition is done in the presence of bacteria, then it is known as bacterial compost. This is done with the help of a plough. Answer the following questions. They have also become a source of pollution. Weeds can be removed by using weedicides. The NPK fertilizer, if overused, harm the soil. These crops require less water to grow. Manure is the organic matter added to the soil to increase its fertility. Important processes in the nitrogen cycle includeâ, Question: State whether the following statements are true or false. For example: By making rows. Difference between manures and fertilizers and types of manures have been explained. Agriculture implements are those tools that help in agriculture and they are very necessary for agriculture. It is helpful in removing unwanted plants or weeds. What would happen if wheat is sown in the kharif season? It also reduces soil erosion. The traditional tool shape is like a funnel. Humans are dependent on animals in innumerable ways. Popular examples of fertilizers are urea, potash, and ammonium sulphate. The major difference between the manures and fertilizers are summarized below: For more information on Adding Manures and Fertilizers, Difference between Manures and Fertilizers, or any other related topics, please visit BYJU’S app.  Good quality seeds are clean and healthy seeds of a good variety. 2. 4. It is defined as process of putting seeds in soil. Rahat: In this method, buckets are knotted with rope on wheel and then bulls rotate the handle due to which wheel turned up and then water gets filled into the bucket and used for different purposes. When crops are grown one after the other, it decreases the productivity of the soil. These are the crops grown in rainy season during the month of June to October. Â. Weed is any plant that grows wild and forcefully, especially among cultivated plants. Answer: Kharif crop includes paddy, maize, soybeans, groundnut, cotton, etc. Storage is also done for fighting emergency conditions.                   Â. It makes the soil porous and facilitates the exchange of gases. In dhekli, buckets are used and then with the help of rope, water is pulled out from the well. A Shirt in the Market Class 7 Extra Questions Social Science Civics Chapter 8 NCERT Extra Questions for Class 7 Social Science Civics Chapter 8 A Shirt in the Market Prelude Question 1. Agricultural crops include field crops (maize, wheat, rice, etc. The crop which gets mature first will be harvested first and then the crop that will mature later will be harvested accordingly. Fertilizers are chemical substances and not typically natural. These are known as winter crops. Question: Differentiate between sprinkler and drip irrigation. Shorter shelf-life-Organic … Weeds are the unwanted plants that grow with the main plant. They are prepared naturally in the fields. In between subjects design, separate groups are created for each treatment. They help in the proper cultivation of crops. NCERT solutions to book questions have also been provided for convenience of the students.
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