After independence, the government planned to bring about improvement in this sector. Crop rotation confers various benefits to the soil. IMPROVEMENT IN FOOD RESOURCES . This soybean produces monounsaturated fatty acid oleic acid. Thus, component crops used in mixed cropping have different canopy. Food Resources: Cereals (Wheat, rice, maize, millets and sorghum) provide us carbohydrates; Pulses (Grams, pea and lentil) provide us proteins; Oil seeds (Soya bean, ground nut, sesame, and castor) provide us fats; Vegetables, spices and fruits provide us a range of minerals, nucleic acids and vitamins. 46.What are the factors from which crops needs to be protected ? 4) One crop needs comparatively lesser water and nutrients than the other. ment of the sporophyte – note: lower plants often have this. However, things changed with time. 47.What is a pest ? 40. Write 4 advantages of mixed cropping. Genetic engineering is used to produce crops with improved food quality traits. If you are a student of class 9 who is using NCERT Textbook to study Science, then you must come across Chapter 15 Improvement in Food Resources. Improvement in quality of food It is one aim of genetic engineering. 42.Write 4 advantages of intercropping. The application of recombinant technique for horizontal transfer of gene in plant sys­tem has several limitations. It illustrates different aspects of greenhouse crop production and protection with special emphasis on greenhouse technologies, design and climate control, cropping systems, in particular those practices which help reduce pests and diseases incidence in crops, integrated pest management, the use of adapted cultivars, and the need for The crop canopy means the structure of leaves, stems and flowers found above ground. This CBSE notes contains CBSE Key Notes, CBSE Revision Notes, Short Key Notes, images, diagrams of the complete Chapter 15 titled Improvement in Food Resources of Science taught in class 9. ADVERTISEMENTS: The below mentioned article provides a study note on transgenic plants. The advanced genetic and molecular techniques have resulted in new varieties of crop … This has the following benefits: (i) Allow farmers to grow multiple rounds of crops in a year. It is a big change. It can improve human health. 43.Write 4 differences between mixed cropping and intercropping. 45.Write 4 advantages of crop rotation. Chapter 15 CBSE Notes for Class 9 Download Free 1. CROP PRODUCTION; ART, SCIENCE AND BUSINESS Crop Production is the art and science of the genetic improvement of crops to produce new varieties with increased productivity and quality. 3) If one crop is deep rooted, the other has shallow roots. Several genes […] The high-yielding varieties of crops take less time for maturing than the traditional varieties of crops. A traditional element of crop rotation is the replenishment of nitrogen through the use of green manure in sequence with cereals and other crops. 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