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On the Cardinalities of Row Spaces of Boolean Matrices

Semigroup Forum, 2001
The authors report on a computer program to determine the cardinalities of row spaces of Boolean matrices; for \(7\time 7\) matrices \(61,63\) are the only numbers less than \(64\) which are not cardinalities of row spaces; for \(8\times 8\) the only numbers less than 128 are 109, 111, 117, 119, 121, 122, 123, 125, 126, 127.
Breen, Michael, Hume, David
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Optimum row spacing for potatoes

Potato Research, 1978
In order to meet requirements of tractors with large axle widths and wide tyres, the technical feasibility and crop response of increased row spacings for potatoes were checked in the field and in model experiments.
Kouwenhoven, J.K., van Ouwerkerk, C.
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Peanut‐Corn Intercrop Performance as Affected by Within‐Row Corn Spacing at a Constant Row Spacing

Agronomy Journal, 1988
AbstractThe advantages of intercropping a cereal with a grain legume are often limited by the dominance of the cereal, which severely inhibits the legume. A field experiment was conducted in 1983 and 1984 in southern Maryland to determine the effects of within‐row corn (Zea mays L.) spacing on a peanut (Arachis hypogaea L.)‐corn intercrop.
Kay M. Calavan, Ray R. Weil
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Corn Row Spacing

2016
Corn plant populations have increased at approximately 400 plants/acre per year over the last two decades. Seeding rates are now commonly in the 32,000 to 38,000 seeds/acre range. Additionally, grain yields are increasing at 1.8 bushels/acre per year since 1996.
Sievers, Josh, Licht, Mark
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Soybean Response to Zone Tillage, Twin‐Row Planting, and Row Spacing

Agronomy Journal, 2006
Although zone tillage can result in favorable in‐row seedbed environments for high crop yield while providing soil conservation characteristics similar to no‐till, it necessitates a wide row width planting system. The objective of this study was to evaluate various zone‐till systems for soybean [Glycine max (L.) Merr.] production.
Ken J. Janovicek   +2 more
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