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| On low to medium productive soils, I just wondered what other peoples feeling were on the difference between the two. I'll first concede that on high pro soils 15's will as good maybe better. Also there is the obvious savings in seed. Maybe this thread has been discussed before, but I didn't see it. |
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Waterloo, N.Y. | i have average soil at best and i am going to plant 15 inch rows, saves a bit on seed and also keeps fungus and mold down during humid times because more air gets through the 15 inch rows, neighbors do the same thing we just plug every other hole in our grain drill when we drill em, neighbors also say there is not a difference in yields |
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Martinsville, Ohio | The planter does a little better job of getting them into the ground. The drillbox is more tolerant of all the stuff I add to my seed. It's a wash for me but seed is so expensive I can see why farmers here have went to 15 inch rows.
If you type in a few names or themes in the search engine of this machine, you will be amazed what you find.
Ed Winkle |
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curtice,ohio | it simply comes down to accuracy and yield. my white planter is so accurate on depth and seed spacing. every couple of years i yield check and the 15" rows have always come out on top |
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Brazilton KS | 7.5 is better on the face of it, all else being equal.
The thing is that all else is not equal. A planter unit does a considerably better job of putting seed in the ground then a drill unit (except possibly for a 750-type single disk with gauge wheel). Score one for 15". Half as many openers means half as much time wasted adjusting the planter/drill. Score two for 15". Planter meters will deliver what they are set for, without further calibration which takes time. Score three for 15". More clearance yields less plugging. Score four for 15".
So, from my point of view, 7.5" is definitely better agronomically but 15" wins on equipment factors. |
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| All the practical yield data I have seen is statistically insignificant between 15" and 7.5".
The cups (meters) on most drills are a joke as they relate to seed spacing, and not to mention how far the seed has to travel to hit the ground. The 15" units seem to do a much better job of seed spacing. I have never seen any of these issues translate to greater yield through the combine.
Bottom line is I don't think either spacing really matters in the end based on my observations.
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Schlegel Farms, Hagerstown Indiana | Had an Great Plains drill....Now have a White Splitter planter and am much happier.
..............................Mark |
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CIL | Try this site from Beck's hybrids. http://www.beckshybrids.com/research/2007/pg1_pg69%2059.pdf
I've not planted Becks yet, but they have a lot of interesting research. We had 15" beans for years. Switched to drilled for two years and this year am back to 15". Mainly because of seed savings,better seed placement, and savings in time by not having to adjust drill for different seed sizes. |
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central - east central Minnesota - | Agree with most of the above comments, but will add my 2¢. Drilling with SI belt meters are as accureate as a planter meter/plate. And once set, don't have to worry about seed size changeing from variety to variety. When the sprayer guy (you or co-op) are running down (runing the tire) on the 15 in row, taking it out, then it's nicer having 7½ in rows. Now a guy has to spray several times - for weeds and bugs, so there seems to be lots of sprayer disease in narrow row beans (20-15 in). |
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North Cental Mo. | Ed, I got into a deal planting some seed beans for Stine one year, and they wanted them treated, and I also put inoculate on them, 2600 seeds per pound, and Kinze planter did not like them at all. LOL. live and learn. On our sandy riverbottom soils the planter is so much nicer just because of depth control and emergence, seed savings and I see no yield difference.
Roy |
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| We moved the proper rows on our 30' planter this year to give a 20" row for the sprayer tire to run down. We are hoping it'll help with the sprayer disease.
Mike |
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East Central Ia | Haven't been able to find any good studies on this. Would like to go to one bigger planter in the future... could I go with a 24row 30'' and plant both corn and beans or should I look at a 36row 20''? How much yield, if any, would I would lose? From what I have seen from several neighbors who are in 20's they tend to have a little higher corn yields, and beans yield the same as 15's. We have had a little white mold trouble but not a lot. |
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| We call it Goodyear Blight.
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Walnut Grove MN USA | I would agree 100% with iseedit. If you must drill use a 750 type drill with si meters. Best of both worlds plus can run two rigs planting at once if possible. I have found in my high ph spots that based on looks alone there are more beans if drilled versus rows. If I could increase population 50% in those spots it would help even more I think. I like the drill in the less productive soils and rows in the better soils. |
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Martinsville, Ohio | They run too tight for the inoculants I prefer using.
Ed |
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United States | We used a 7.5" drill. The last 3 years, we are seeding in 15 inch rows. On the clay and lighter soils, 15" seems to have better
emergence. Overall yield is better than with a 7.5" drill on all our soils.
Byron ECIN |
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Eastern VA. No such thing as too many Magnums. | Last year I planted in 15" rows with a no till drill. I think it would have been alright if everything would have worked like it should. But my drill isn't accurate enough to suit me, and I also like the depth control of the planter. I had all these Monosem units collecting dust, so yesterday we set up to do twelve 18" rows. We won't plant any beans until last week of June when sweet corn and wheat come off. I'm going to shoot for 150,000 on the irrigated stuff. I think the later you plant, the tighter the rows should be. 18" is a little wide for as late as I'm planting, but we're gonna try it anyway. If you plant in May, I think 7.5 is too tight. Here's a picture of what we set up yesterday.
 (Monosem12x18small.jpg)
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 Monosem12x18small.jpg (96KB - 149 downloads)
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| I seen this study, my problem with it that they are done in Alanta, In, which I feel are pretty good soils and may not apply to my farm. |
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Near Richmond, IN | Before I bought our drill a few years ago I talked to Kelly Day that ran the soybean yield trials at Purdue and asked him about yield differences between different row widths. He told me at that time that they had seen no difference in yields between row widths of 20" and under. I also talked to Monsanto about weed control and they said the same thing about no difference in control in 20" and under, although that one might be a little harder to believe. I was trying to decide between 7.5" and 10" and went with 10". |
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| I have one client with SI's on the 1590 drill. I was really impressed with the difference in stand with SI versus the 50's technology that everyone else uses on feed cups, but not so impressed with what I thought the yield should have been. It could be that some other factor had something to do with lack of yield.
15" beans will help to get the beans out of the crust, which I think is a real plus for our area.
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Martinsville, Ohio | No kidding. Are you folks able to do anything yet? Not 93 thank goodness but does not look good.
Ed |
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Martinsville, Ohio | Boy would I like that rig in my ground! Of course the torch would be on it in no time but talk about precision planting. That one would might nudge the old 5100 out of the shed.
Ed |
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North Cental Mo. | We have not planted a seed, tractors are hooked up, and are in the shed. We are hoping to possibly do a little tomorrow afternoon, but then there is rain in the forcast again. I don't know of any corn or beans planted in my county, and a lot of corn acres have no N on them.
Roy |
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C-IL | I have had several neighbors fret on 30" vs 15" beans. One says leave the 15" in the shed and cover the ground with the bigger 30" planter. The other thinks he sees a 3-5 bu with 15". Where is a good place to get this info besides testing in each field? |
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Chebanse, IL..... | I believe we're seeing migration back to 30" here in NE IL. I know of a couple of neighbors that have gone from 15" back to 30". I do not know of any neighbors that have added new narrow row bean equipment, unless it was in conjunction w/a wheat planter. Another poster referred to Beck's data. I believe they show only a very small yield gain of 15" over 30". I personally question "small" yield gains on accuracy. Especially beans. I'm not sure we see the big yields in beans in NE IL that others talk about here. So, maybe we're not giving up that much to begin with. I believe implement dealers also report decreased narrow (=less than 30") bean rows. I remember when it was a big deal going from 38" row beans to 30". When planting 38" row beans we used to shove the markers in on our 494 planter to gain a little extra. But, that was probably more for combining reasons. Again, row width is probably a "here" thing. Re. seeding rate...it seems that just about all publications & group discussions indicate that lowering seeding rates should be on everyone's list of "things to question...". U of IL indicates that they see no difference in yield vs seeding rate: http://www.ipm.uiuc.edu/bulletin/article.php?id=930 They do mention that SW MO guy, Cullers, grew 150 bu beans using 300,000 ppa. If one is shooting for that yield, maybe you'd better keep the population up there.
Edited by Ron..NE ILL..10/48 5/10/2008 06:48
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SW MN and Gold Canyon AZ | My 2 cents, you probably will not see much difference between 7, 10 , 15 or 20's, but there is a difference when you go to 30"s. I believe U of Mn has been doing 30 "s vs narrow for as long as I can remember. I do not recall seeing 30" ever beating narrow rows. I have been narrow row beans and have done side by sides for as long as I farmed and never seen 30"s beat my drills.
If you live in the northern states ,narrow will pay.
As far as white mold ,select varieties that handle that, don't go to 30 inch because of white mold and lower your yields.
One thing that was not discussed was the price of seed beans next year. Not to give anyone sticker shock but if futures stay in this TEENS area I'm sure 40$ would not be out of the question. Not sure though as it depends on the tech fee increase if there is any. This could sway more people to go to lower pops and 30 inch spacing. But a 3 bu increase in yield with narrow rows @ 12$ a bu pays for ALOT of seed. So don;t try to save 5$ on seed and give up 31$ of extra profit.
I went from a drill to 15" inch rows this year, knowing that 1. seed price increases would lower the value of my drill and 2. I could cut seeding rates from 175000 to 140000 and save some money.
I notice some of the really larger farmers buying 24 row or larger planters all on 30 inch spacing. I think there willing to give up yield to get done quicker. |
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Brazilton KS | Don't plant the same direction you spray and it won't make any difference.
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| we run a 40ft 1890 air seeder and a 32 row 1790 to plant soybeans, 1790 is extremely accurate and cannot complain about the accuracy of the airseeder, just set the seedstar monitor for the pounds per acre based on seed size and it also comes out very close. I haven't seen any yield difference in the two. To address running over beans with several spray trips, what we have done is come 60 inches from the outside left units and block them off thus giving us 120 inch tram lines for our 4720, works really well and you don't run over many beans. |
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central - east central Minnesota - | Surprised at the number of co-op guys and farmers that think more gets run down going across the planting then when trying to go with the rows . . . . Of course, there is a roughness issue when going across the old rows, which is why the co-op opts to run "down" the row . . . . |
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Brazilton KS | Pretty simple, really. Running with the rows you take out 2 rows out of every 64. Running across you take out 22.4" every 960", at least with my tires. Anyone that thinks they are going to drive "between" 15" rows is as nutty as the guy who thinks he can tell how much air is in a truck tire with a hammer. I can't do it reliably with 11.2's and it's just impossible with 14.9's.
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15" vs 7.5" soybeans
