KPSC Mains Science

Fertilizers All plants need certain mineral nutrients to survive. These minerals occur naturally in the soil and are taken up from the soil by the roots of the plants. Most soils usually have enough of these minerals to keep plants healthy. However, some nutrients are gradually used up by the plants, or are washed out … Read more

Social and Electronic Media Social Media can be defined as any web or mobile based platform that enables an individual or agency to communicate interactively and enables exchange of user generated content and it is explained by a number of tools, which includes blogs, Wikis, discussion forums, micro-blogs, twitter and social networking sites. Internet has become … Read more

Reproductive systems The reproductive system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormones. A gamete is a haploid cell that combines with another haploid gamete during fertilization. Sex hormones are chemical messengers that control sexual development and reproduction. The male reproductive system consists of structures … Read more

Land Resources Management Land and water have been the basic elements of life support system on our planet since the dawn of civilization. All great civilizations, flourished where these resources were available in plenty and they declined or perished with the depletion of these resources. In recent years, the land resource has been subjected to … Read more

Photosynthesis Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds. It would be impossible to overestimate the importance of photosynthesis in the maintenance … Read more

Definition of Internet, search tools, web browsers, e-mail and search engines. IT applications: E-cards, E- shopping, E-commerce.   INTERNET   The Internet is a global network of billions of computers and other electronic devices. With the Internet, it’s possible to access almost any information, communicate with anyone else in the world, and do much more. It’s important … Read more

Uses and harms of bacteria and virus Harmful bacteria Pathogenic Bacteria These bacteria cause great losses to plant and animal popula­tion by causing several diseases. Reduction of Soil Fertility Some facul­tative anaerobic bacteria are available mostly in the oxygen deficient soil which reverse the nitrifying process, thereby causing the loss of a part of its … Read more

Cost benefit and investment analysis of agricultural enterprises Water Resource Development A capital intensive project. To reap the benefit of irrigation the farmer should not ignore the supporting services as extension, marketing, credit and transportation both for handling crop produced and supply of inputs needed. The economic analysis must take full account of all the … Read more

Bio-fuel cultivation and extraction Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Bio‐ fuels include fuels derived from biomass conversion, as well as solid biomass, liquid fuels and various biogases. Although fossil fuels have their origin in ancient carbon fixation, they are not considered biofuels by the generally accept‐ … Read more

Importance of Sericulture in India and Karnataka Historical perspectives of Sericulture in India During Pre-independence period Sericulture in India has a remote past dating back to several centuries prior to the commencement of the Christian era. It has been held that mulberry culture came from China to India around 140 B.C. But there have been … Read more