Short Staple Variety Trial, Greenlee County, 1997
Lee J. Clark, Safford Agricultural Center
Six short staple cotton varieties including two New Mexico acalas varieties and
one advanced strain, two Australian varieties and a SureGrow variety with
higher yield potential were tested in this study. The SureGrow variety,
SG 125 had the highest lint yield with a yield of 875 pounds of lint per acre,
out producing the following varieties by 80 pounds per acre. The average
yield was about 100 pounds per acre lower than the previous year, and 50
pounds less than the 5 year average due to a cold spring and an early frost.
In addition to lint yields; percent lint, plant heights, height to
node ratios, plant populations and lint hvi values are shown. A lint yield
comparison for 1993 through 1997 is included in this paper.
This experiment and a sister experiment in Cochise county are a
continuation of varietal evaluations on the acala varieties that grow in the
high deserts of Arizona and New Mexico. The current New Mexico 1517
acalas and the advanced strains that are near approval are the backbone of
the trial with newly developed acalas from California also being included.
This year two Australian varieties and one SureGrow variety, with high yield
potential, were also included in this trial to see if they would be beneficial
to local growers.
Materials and Methods
The varieties were planted in two row plots in four replications on the
Stan Jones farm in Virden, NM, using their equipment and normal cultural
practices. The crop history listed below outlines the important things
that took place during the growing season.
Crop History - Jones farm
- Previous crop: Grain sorghum
- Soil type: Pima sandy loam
- Planting date: 30 April 1997   Rate: 17 pounds per acre
- Fertilizer: 200 lbs/ac anhydrous ammonia
- Herbicide: Treflan and caparol
- Insecticide: None
- Pix/Prep: None
- Defoliation: None
- Irrigation: Furrow
- Harvest date: 11 November
- Heat units (86/55) to harvest: 3734 at the Safford Agricultural Center
to 3260 for Duncan.
Adjustment factor of 0.873 calculated from Brown (1) HU data for Safford and Duncan.
Plots were mechanically picked using the cooperator's machines, with
plots being weighed using a basket scale and then dumped into a
module builder. Sub-samples were taken to determine lint turnout and
Results and Discussion
The spring of 1997 was cold and stand establishment was slow. Then after
the middle of May the weather warmed up more than normal, aiding greatly in the
The yields are shown in Table 1. The SureGrow variety
produced approximately 80 more pounds of lint than 1517-95 principally due to the higher lint
turnout. With a 7 cent premium, the values of those two varieties would be about the same.
Planting densities were very uniform between all varieties and in the optimal range.
Table 2 shows more agronomic values from the varieties.
It is interesting to note that the 1517 cultivars have larger bolls than the other varieties,
including B 5008 from the same breeding program. It appears that 1517-91 may have lost some
of it's yield potential early in the season, its first fruiting branch is higher than the
other selections. The height to node ratio (HNR) is very uniform across varieties and in an
area that would indicate good growth during the season.
Table 3 contains the HVI (High Volume Instrument) values
for the lint. The three cultivars from the New Mexico breeding program had superior length,
strength and uniformity compared to the other varieties even though the Australian varieties
Table 4 contains a five year yield summary of varieties.
IF 1001 has the highest lint yield average followed by the three New Mexico lines. The actual
values of the varieties would depend on cotton prices and the premium offered for the New
Mexico acalas. With prices as they were in 1997, the top four varieties would be very close
in value. The number of heat units (HU) was the lowest within the past 4 years as was the
yield. The correlation between HU and yield is not significant at the 95% level of
- Brown, Paul W. 1991. Normal values of heat unit accumulation for southern Arizona. Extension Report 190041, May 1991.
- Clark, Lee J. 1997. Short staple variety trial, Greenlee county, 1996. Cotton, A College of Agriculture Report, The University of Arizona, Tucson, AZ. Series P-108, pp. 155-158.
- Clark, L.J. 1998. Short staple variety trials in Cochise County, 1997. In this publication.
Appreciation is expressed to Stan Jones and John Swapp for their interest and cooperation in this study. Seed was provided by New Mexico Crop Improvement, Australian Cotton Seed Distributors and SureGrow. A special thanks is due Stoneville Pedigree Seed Co. for their help in ginning the grab samples to provide the percent lint turnout for this field trial and the sub-samples from which HVI analyses were run.
This is a part of publication AZ1006:
"Cotton: A College of Agriculture Report," 1998, College of Agriculture, The University of
Arizona, Tucson, Arizona, 85721.
Any products, services, or organizations that are mentioned, shown, or indirectly
implied in this publication do not imply endorsement by The University of Arizona.
The University is an Equal Opportunity/Affirmative Action Employer.
This document located at http://ag.arizona.edu/pubs/crops/az1006/az10063f.html
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