Medieval rice farmers in Japan produced about 88 bushels of rice per acre. With today's farming methods as much as 241 bushels per acre are being reported.
150*40 kgs per acre
There's too many variables here to be able to answer this question. However, just for example, the US average yield from all states of all barley types for the period from 2006 through 2011 is 66.7 bushels per acre, according to the USDA.
World average - about 4 tonnes per hectare, world record - about 10. Yield is complicated by the fact that 2 crops per year is common, and 3 are possible under ideal weather and field conditions. Crop scientists estimate a realistic maximum for the "perfect" hybrid variety at over 20 tonnes per hectare.
The U.S. average yield for 2010 was 46.6 bushels/acre or 2.92 tonnes/hectare. The figures for 2011 are slightly lower, at 43.0 bushels/acre or 2.89 tonnes/hectare. According to the US Department of Agriculture, the US average soybean yield for the period 2006 through 2011 was 42.22 bushels per acre.
The top 20 countries have a yield of over 37 bushels (of 60 pounds each) per acre, or 2.3 tonnes per hectare.The U.S. average yield for 2010 was 46.6 bushels/acre or 2.9 tonnes/hectare.The best country, Turkey, produced an average of 58.7 bushels/acre or 3.7 tonnes/hectare.The record belongs to a farmer in Missouri who produced an average of 100 bushels/acre over a 300 acres plantation in 2010, and reached 160 bushels/acre on a specially irrigated field.Roughly 50, but it depends on the variety and environmental factors
15.36 Tonnes per hectare. Mike Solari, New Zealand
There are four roods per acre.
About 2.88 metric tons per hectare, according to the USDA.
You can see definite statements about trees and oxygen in many places:* Two mature trees provide enough oxygen for a family of four. * One acre of trees removes 2.6 tons of CO2 per year. These statements do not take into account the types of trees, the number of trees per acre, the hours of sunlight, whether they are deciduous or coniferous, if the climate is warm or cold, if the trees are young or mature.However, using the factoid that "One acre of trees removes 2.6 tonnes of CO2 per year" the equivalent oxygen production rate would be about 1.6 tonnes per year. For 1000 acres 1.6 thousand tonnes.
How many kilograms of what?
There are around 40 guntas per acre, or 40 guntas in one acre.