There are various factors involved in agriculture. Listed below are Physical Conditions along with the books to refer about them. Physical conditions that affecting agriculture are 1. Soils and Fertilizers The richness of the soil is a very important physical factor affecting agriculture. Soils differ in respect of chemical composition and physical. Soils may be fine or coarse, porous or non-porous. In general fine soils like loam or silt are very fertile. The chemical composition of the soil determines its productivity. Sustainability of agricultural systems is a major global concern due to population growth and a number of environmental factors. The key to the management of soil fertility and also impart a scrupulous understanding of plant nutrition, soil fertility, nutrients supplied through fertilizers and manures, manufacture of fertilizers and preparation of manures play a vital role. During recent decades of research by a large group of agricultural scientists working in the diagnostic field, many new methods have been devised to aid farmers in fertilizing their crops more effectively. A major objective of this book is to bring together in one volume a comprehensive discussion of both the underlying theory and the practical application of these various techniques. To attain that objective, the services of a group of distinguished Scientists were enlisted to prepare the various chapters. These scientists are outstanding in their respective spheres of work, both as to theory and as to practice. 2. Climate Climate change is a hard reality and changing weather patterns, retreating glaciers, polar ice melt, sea level rise, increased severity and occurrence of natural disasters like flood, super cyclone, drought, changes in hydrological cycles, crisis in freshwater and drinking water resources, uncertainty in cereal output, increasing vector borne diseases, changing migration pattern and flowering time, are just some of the consequences already being experienced by us. Fragile and delicate ecosystems like coral reefs and mangroves are extremely sensitive to the slightest variation in climate. In developing countries like India, climate change may contribute an additional burden on ecological and socio-economic systems associated with rapid urbanization, industrialization and economic development. Apart from the above physical condition Agriculture Engineers must have the knowledge of Basics of Agriculture to perform the services in their respective field. The scientific approach for understanding of the problems concerning soil, plants, agricultural equipments and their management is really important. Another aspect is Rainwater harvesting which is a technique for accumulating and storing of rainwater, channelized to flow to the ponds, lakes and over- and underground storage places, which can be used not only to recharge the groundwater, but also to provide drinking water, for irrigation, livestock as well as other typical uses given to water. The rainwater is collected from various hard surfaces such as roof tops and/or other types of manmade above ground hard surfaces. Rainwater harvesting also aids in keeping the village roads from getting slushy during the rains and maintaining the transport mobility and prevent flooding in some urban areas. http://www.astralint.com/indian-books/state-of-the-art-report-on-sustainable-rainwater-harvesting-and-groundwater-rechare-in-developing-countiresnam-sandt-cen/isbn-9788170357704.aspx
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