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One reason for cross slot or crossed recess screws is for convenience in manufacturig. Just faster to find a slot & still be able to use a regular driver. Cross recess screws can be of almost any. Circularly Polarized Dielectric Resonator. Shop from the world's largest selection and best deals for Scalextric Cross over Scalextric & Slot Car Tracks. Shop with confidence on eBay! Founded by jewellery makers and artisans Cross produce a wide collection of the highest quality fountain, ballpoint and rollerball pens and pencils.
The only Opener in the World that can achieve all 5 functions that define Low-Disturbance No-Tillage (LDNT)... | ||
Cross Slot® Openers
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Cross Slot® Rigid Drills (Standard)
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Cross Slot® Folding Drills (wing up)
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Cross Slot® ToolbarsFor separate tow behind or tow between commodity carts
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Cross Slot® Single row drills for small areas
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Cross Slot ® Retrofit Kits
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Cross Slot® Parts
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Engineering for Life
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'The wearing parts on this drill are very easy to replace and adjust. It takes very little time in the field and very few tools.' (Mark Scott, Contractor, NZ) | 'You just go from one condition to the other and do not have to change anything. You wonder why everybody doesn't have one of these drills.' (Douglas Giles, Contractor, NZ) | |
The Cross Slot® suite of low-disturbance no-tillage (LDNT) technologies arose almost by accident. As a young scientist, Dr John Baker initiated a project at Massey University, New Zealand in 1967 that sought to identify and correct the reasons why early no-tillage sometimes failed around the world. His team of international scientists and 27 graduate students unraveled the science of how no-tillage machines work in untilled soils and why many fall short of promoting fail-safe seedling emergence or maximizing crop yield.
All of these findings were published in the international scientific literature and have never been challenged. They earned the team several technical innovation awards and Baker a prestigious Sir Earnest Rutherford Science and Technology medal in 1996. The team was a finalist in the 2010 World Technology Awards in New York and Baker was nominated for the world Food Prize in 2013 and 2014. He was also invited to present his findings to a special sub-committee of the US Senate in 1989 in preparation for introducing The US Food Security Act (1990).
Over time, scientists were finding that no-tillage had only partly realized it's potential to make world food production truly sustainable. In fact the term 'no-tillage' had been hijacked by many inferior technologies. There should have been huge advantages in environmental impact, sustainability and carbon sequestration but these were being only partly realized.
It was perhaps inevitable that someone would respond to Baker’s early discoveries by asking him if you have found so many faults of existing openers, why did he not design a better one?
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It seemed a reasonable question. Baker was part engineer and part agronomist and had invented several components of agricultural machines as a young man. He held a bachelor’s degree in agricultural science, a masters degree in soil science and a PhD in agricultural engineering. But before he designed anything resembling a new no-tillage opener, he wanted to have verifiable scientific reasons for every engineering design choice that he or his team would make. He did not want to leave anything to chance. After all, no-tillage farmers get only one opportunity (in a single pass over the field) to create suitable soil conditions for seeds and he wanted to know that each of the functions of his machines would be backed by robust science.
After many years and prototypes the Cross Slot® Opener was born!
Cross Slot® is the only Opener in the World that achieves all 5 functions that define Low-Disturbance No-Tillage (LDNT)...
- Minimize soil and residue disturbance during seeding without blocking.
- Micro-manage crop residues by replacing them over the sown seed slots
- Create a fail-safe germination and seedling emergence environment.
- Place and cover seeds at a consistent depth regardless of variations in surface smoothness, soil density or crop residues.
- Band fertilizer separately from, but at the same time as the seeds.
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The truth about Paris:In 2019 a Paris court ruled that a French no-tillage seed drill manufacturer could legally copy the patented Cross Slot opener even although the Cross Slot patent was still valid. The French manufacturer wanted everyone to believe that their design was innocently “inspired by New Zealanders”. But the truth of the matter is that: · In 2009, a Lyon-based engineering student was hosted as an intern student for 6 months in New Zealand by the developers of Cross Slot® no-tillage technologies. · Both he and his university signed a detailed Confidentiality Agreement promising not to copy, remove of steal any design secrets from the hosting company even although he had access to all confidential Cross Slot® drawings, designs and prototypes. · Shortly after the student returned to France, copies of Cross Slot® openers, made in France, started appearing in Europe under a different brand name without Cross Slot's consent. |