NCERT Class 9 Science Chapter 12 Improvement in Food Resources Solutions
NCERT Class 9 Science Chapter 12 Improvement in Food Resources Solutions GENERAL SCIENCE TEXTUAL QUESTIONS AND ANSWERS INTEX QUESTIONS AND ANSWERS Textbook Page No.204 1. What do we get from cereals, pulses, fruits and vegetables? Ans.The cereals provide us with carbohydrates. The pulses provide us with proteins. Fruits and vegetables give us carbohydrates, protein, fat, vitamins, minerals and lots of fibers. Textbook Page No. 205 1. How do biotic and abiotic factors affect crop production? Ans. The different biotic and abiotic factors of the environment affect the net crop production in various ways. Insects, nematodes, birds and diseases are biotic factors. These biotic factors mostly feed on crops and thus they draw nutrition from them reducing their yeild. Similarly, abiotic factors such as drought, salinity of soil, water logging in croplands, heat, cold, etc. also reduce the net crop production. Some natural calamities like flood, droughts, etc. are always unpr...