Sentences with phrase «then arable land»

Our agricultural methods since neolithic times have rendered barren half of the then arable land on the earth.

Not exact matches

These findings can also be illustrated in other aspects of resource use: the team found the highest rate of increase in the cultivation of arable land to be in the 1950s; the peak for human - made irrigation areas then followed in the 1970s, and the peak for nitrogen fertilisers was subsequently in the 1980s.

The natural variation that has led us out of the Little Ice Age has a bit of frosting on the cake by land use; and, part of that land use has resulted in a change in vegetation and soil CO2 loss so that we see a rise in CO2 and the CO2 continues to rise without a temperature accompaniment (piano player went to take a leak), as the land use has all but gobbled up most of the arable land North of 30N and we are starting to see low till farming and some soil conservation just beginning when the soil will again take up the CO2, and the GMO's will increase yields, then CO2 will start coming down on its own and we can go to bed listening to Ave Maria to address another global crisis to get the populous all scared begging governments to tell us much ado about... nothing.

For the ideal temperature in the northern hemisphere, determine the two bands of latitude between which the most arable land exists, and then determine the temperature for that strip which will maximize agricultural output.

Then think about where the hell the USA is going to be when virtually all of our currently arable land is dust - bowl dry in the typical year.