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Start practicing using this paper  for CBSE Board 2014 Social Science 10th SA-1 Original S.St. Question paper  CBSE 2013-1  10th SA-1 Original S.St.Question paper CBSE 2013-2   10th SA-1 Original S.St.Question paper CBSE 2013-3    Click here to Download File

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SA-1 class 9 Original paper of Science [13-9-2014]] Q1. which organism lacks any kind of membrane SA-1 class 9 Original paper of Science [Exam Date : 13-9-2014]]   Read/View     Download

Chapter : IMPROVEMENT IN FOOD RESOURCES BIOLOGY-STUDY NOTES CLASS 9 INTRODUCTION There is a need to introduce production efficiency of crops and livestock because 1. rapid increase in population 2. No major scope of increasing area of land under cultivation. Increase in food production without degrading our environment   and disturbing the ecological balance i.e. Sustainable Practices are required in agriculture and animal   husbandry. TYPES OF CROPS Cereals: wheat, rice, maize, millets and sorghum. Provide carbohydrates for energy requirements. Pulses: pea, gram, black gram, green gram, pigeon pea and lentil. Provide proteins Oilseeds: soya bean, ground nut, sesame, castor, mustard, linseed and sun flower. Provide necessary  fats. Vegetables, spices and fruits provide vitamins and minerals.  Different crop require different climatic conditions, temperature and photoperiods for their growth  and completion of life cycle. Crops which grown in