Small land holders can be self sustainable. This was proved by Shri. Santu, a small farmer in Gorakhpur, who started making a decent living from farming by increasing the diversity on the farms and integrating one into another.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/food-sufficiency-through-diversified-farming-case-small-farmer
[2] http://admin.indiaenvironmentportal.org.in/category/author/anita-singh
[3] http://admin.indiaenvironmentportal.org.in/category/journal/leisa-india
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agricultural-systems
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/home-gardens
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vermiculture
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-fertilisers
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-pesticides
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/legumes
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nutrition
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/farmers
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crop-biodiversity
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agroecosystem-planning
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gorakhpur-d
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/food-security