Mathura,
Due to the heavy construction and population the soil or land is limiting factor today. there is very small land holdling today we have. govt senerio for last yr tells that only avg. 1.5 ha. so there is trend like you said. soil less farming. soil less farming comparises media other than soil for growth there are different types used for farming. our ancent uses soil as growth medium for agriculture. like wise there are number of methods and media for production. of which one is explianed by Ashwini as water. and another you can use any material that can be easily available at your place and also having the growth property that means it should have some water holding capacity, microbial content, so you may use the wooden powder for growth. it can does well try it. and such useful items are in huge quantity in india.
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