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Agricultural Matters
Conditions getting a little bit worrying weather wise
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<blockquote data-quote="farmerm" data-source="post: 6429948" data-attributes="member: 7195"><p>I can do better than that.. somewhere I have a cross section of a ridge that had barely wet the top inch after 30mm irrigation, dry potato ridges can become very hydrophobic after planting! The field looks wet, you walk over it and it feels wet, but then you have a dig and find all the irrigation as disappeared down the drains! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite62" alt=":wtf:" title="WTF :wtf:" loading="lazy" data-shortname=":wtf:" /></p><p></p><p>We monitor a lot of soil moisture in irrigated crops, I would say I have seen drier seasons. We only have a small number of sites showing below 50% of moisture holding capacity at the moment, though if we get a few high temperature, high transpiration days where water uptake hits 7/8/9mm per day it could turn around very quickly! </p><p> </p><p>Below is data from a crop of spuds in East Anglia, it sat water logged for 10 days in June but now has a 60mm moisture deficit, It managed to chase the moisture down as the upper layers dried out and started using water from 50cm a week ago, it will have exhausted all the available moisture in the top 50cm within a few more days... Guard cells are closing, transpiration is being restricted and growth slowed. It really needed 25mm irrigation a week ago followed by another today... </p><p></p><p>[ATTACH=full]817692[/ATTACH]</p><p></p><p>[ATTACH=full]817690[/ATTACH]</p><p></p><p>Where cereals are still green and have moisture available in the soil they are using 2-3mm water per day. 10 days without rain can be enough to take soil from capacity to moisture stress on light land.</p></blockquote><p></p>
[QUOTE="farmerm, post: 6429948, member: 7195"] I can do better than that.. somewhere I have a cross section of a ridge that had barely wet the top inch after 30mm irrigation, dry potato ridges can become very hydrophobic after planting! The field looks wet, you walk over it and it feels wet, but then you have a dig and find all the irrigation as disappeared down the drains! :wtf: We monitor a lot of soil moisture in irrigated crops, I would say I have seen drier seasons. We only have a small number of sites showing below 50% of moisture holding capacity at the moment, though if we get a few high temperature, high transpiration days where water uptake hits 7/8/9mm per day it could turn around very quickly! Below is data from a crop of spuds in East Anglia, it sat water logged for 10 days in June but now has a 60mm moisture deficit, It managed to chase the moisture down as the upper layers dried out and started using water from 50cm a week ago, it will have exhausted all the available moisture in the top 50cm within a few more days... Guard cells are closing, transpiration is being restricted and growth slowed. It really needed 25mm irrigation a week ago followed by another today... [ATTACH=full]817692[/ATTACH] [ATTACH=full]817690[/ATTACH] Where cereals are still green and have moisture available in the soil they are using 2-3mm water per day. 10 days without rain can be enough to take soil from capacity to moisture stress on light land. [/QUOTE]
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