Links provided @ Ravindra will be better. FAO Statistics, Ministry of Agriculture etc. In addition, you can check in Department of Economics and Statistics of each Indian State
Yes FAO stats are the most comprehensive, but also the US Department of Agriculture state especially from the FAS (Foreign Ag Service) are pretty accurate for major corn and soybean producing countries.
Surendran Udayar Pillai your statement is not true. The data used by the website ourworldindata is from FAO, it's just presented in a more interactive manner...
No Guillaume Adeux, I have not mentioned about which one is better. Apart from the mentioned links, I suggested to attempt with Department of Economics and Statistics of each Indian State to get the block/ District wise data. The word better might be wrongly understood it seems.
Statistics along with the analysis of any data statistically of any field is a must to make plan for future. However, crop production statistics is crying need for every sector for all nations. In Bangladesh, we can find any kind of statistical data related to Agriculture including crop production in the "YearBook of Agricultural Statistics of Bangladesh". Likewise, the crop production statistics of other countries or organizations can be found in their related statistical website/Book.
Please note that Indiastatagri.com is not free but requires subscription. If your institution has subscription, of course, you can also try http://www.indiastatagri.com/
I hope these are enough to get your required data for soybean and maize!
Maize (Zea mays L.) is a commodity of high economic significance in India. Its demand and production is increasing more rapidly as compared to other major commodities. It is estimated that by 2025, India would require 50 million metric tonnes (MMT) maize grain, of which 32 MMT would be required in the feed sector, 15 MMT in the industrial sector, 2 MMT as food, and 1 MMT for seed and miscellaneous purposes. Over this, there would be about 10 MMT of export potential also. Thus, in the next 10 years there is a necessity and opportunity for doubling India's maize production from the current level of approximately 25 MMT. Prevalence of yield limiting biotic and abiotic stresses, lower adoption of modern production technologies in certain regions, extension and policy gaps, etc. remain major challenges before the Indian maize sector. Therefore, strong technological and policy interventions would be required to achieve the goal of doubling maize production. By 2025, productivity level of 5-6 tonnes/ha need to be targeted, in order to double the production without significant increase in acreage. Technological interventions like cultivar development and diversification, incorporation of stress resilience in the germplasm, accelerating the breeding process through new tools, and adoption of modern cultivation and protection practices including conservation agriculture technologies would play a key role in increasing the productivity. At the same time, policy interventions like strengthening of post-harvest handling infrastructure, price stabilization mechanisms, and value chains, streamlining of extension system, augmenting hybrid seed delivery mechanisms, appropriate policy on genetically modified seeds etc. will be essentially required