Environment & Energy
Related: About this forumWhy crop rotation works. New research could help explain the dramatic effect on soil health and yie…
http://news.jic.ac.uk/2013/07/crop-rotation/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+NewsFromTheJohnInnesCentre+%28News+from+the+John+Innes+Centre%29July 18, 2013
[font size=3]Crop rotation has been used since Roman times to improve plant nutrition and to control the spread of disease. A new study to be published in Natures The ISME Journal reveals the profound effect it has on enriching soil with bacteria, fungi and protozoa.
Changing the crop species massively changes the content of microbes in the soil, which in turn helps the plant to acquire nutrients, regulate growth and protect itself against pests and diseases, boosting yield, said Professor Philip Poole from the John Innes Centre.
Soil was collected from a field near Norwich and planted with wheat, oats and peas. After growing wheat, it remained largely unchanged and the microbes in it were mostly bacteria. However, growing oat and pea in the same sample caused a huge shift towards protozoa and nematode worms. Soil grown with peas was highly enriched for fungi.
The soil around the roots was similar before and after growing wheat, but peas and oats re-set of the diversity of microbes, said Professor Poole.
[/font][/font]
JNelson6563
(28,151 posts)It was also common practice in medieval times to leave a strip of land fallow and rotate that every year.
Julie
OKIsItJustMe
(19,938 posts)[font size=3][font size=1]2[/font]Speak to the people of Israel and say to them: When you enter the land that I am giving you, the land shall observe a sabbath for the Lord. [font size=1]3[/font]Six years you shall sow your field, and six years you shall prune your vineyard, and gather in their yield; [font size=3][font size=1]4[/font]but in the seventh year there shall be a sabbath of complete rest for the land, a sabbath for the Lord: you shall not sow your field or prune your vineyard. [font size=3][font size=1]5[/font]You shall not reap the aftergrowth of your harvest or gather the grapes of your unpruned vine: it shall be a year of complete rest for the land.[/font][/font]
However, this study tells us about how crop rotation works (why does planting a different crop have such a dramatic effect?)
dipsydoodle
(42,239 posts)which plowed back is a natural nitrogen fertiliser
OKIsItJustMe
(19,938 posts)The Romans used a rotation system called food, feed and fallow
However, the idea of intentionally planting clover didnt come until much later: https://en.wikipedia.org/wiki/Crop_rotation#History
Laelth
(32,017 posts)-Laelth
Jessy169
(602 posts)Insects tend to specialize -- they prefer one type of plant or one type of root system to others, in fact their survival depends on it. A "few" insects during a growing season feeding on one of your crop varieties won't cause much damage, but the millions of eggs they lay ready to hatch for the NEXT growing season will obliterate your crop -- UNLESS you trick those dirtly little bastards by planting a different crop, which they won't find nearly as much to their liking. Or, if no crop is planted, then that's going to be an unpleasant surprise for them too.
felix_numinous
(5,198 posts)that their products were superior to the old time tested ways. And now, TIME has tested these chemicals, and they have FAILED. Now it's time to go back to what works.
NaturalHigh
(12,778 posts)+1
I wish I could rec your reply.