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Location:

Mississippi State University Extension Field Mississippi State University Logo

Contact: H. Randall Smith, Area Agronomist, MCES-MSU

Enterprises: Cotton

Treatments:

10 Gal/Ac applied four times (1 pre-square, 2 square, 1 bloom);

20 Gal/Ac applied four times (1 pre-square, 2 square, 1 bloom);

20 Gal/Ac applied six times (1 pre-square, 2 square, 3 bloom);

60 Gal/Ac at planting;

Untreated Check

Agriculture Issues:

Objectives are to evaluate the effects of Ag 1000 on the fruiting mechanics and yield of cotton grown in reform nematode infested soils without any fertilizer additives.

Cotton flowering stageCotton PlantOpen Cotton Boll

This study was done in collaboration with Randy Smith, an agronomist with Mississippi State University. The objectives are to evaluate the effects of Ag1000 on the fruiting mechanics and yield of cotton grown in reform nematode infested soils without any fertilizer additives. This case study is a summarization of Randy Smith’s work and final report from 2013.

Materials and Methods:

Planting Date: 6-26-2013

Cotton variety: PHY 375 WRF

Harvest Date: 12-5-2013

Soil type: Commerce Silt Loam

Rows/plot: two

Row Spacing: 40”

Row Length: 40’

Irrigation: Yes

Randomized Complete Block Design

Four Replications

Treatments:

10 Gal/Ac applied four times (1 pre-square, 2 square, 1 bloom);

10 Gal/Ac applied six times (1 pre-square, 2 square, 3 bloom);

20 Gal/Ac applied four times (1 pre-square, 2 square, 1 bloom);

20 Gal/Ac applied six times (1 pre-square, 2 square, 3 bloom);

60 Gal/Ac at planting;

Untreated Check

Evaluations Made:

Pre-square plant map: Plant height (PH), Total nodes (TN), Node of first fruiting branch (NFFB).

Square plant map:PH, TN, NFFB, % first position retention.

Bloom Map: PH, TN, NFFB, Nodes above white bloom (NAWB), Node of white bloom (NOWB) and % first position retention.

Open Boll Map: PH, TN, NFFB, Nodes above cracked boll (NACB), Node of cracked boll (NOCB)

(ul)Box Mapping which is used to quantify yield and performance by position. Plants from 10 row feet were removed and seed cotton from each position was removed and placed into designated box compartment and a token used to represent each boll for total number by position. Each fruiting position was weighed using gram scales. Both main axis and vegetative bolls are accounted for.

Results:

In this study it was shown that 10-20gal/acre applied over 4 applications resulted in the greatest overall plant growth. However, 2 gal/acre whether applied 4x or 6x resulted in the highest overall yield. The application of 60gal/acre showed little benefit verses 10gal/acre and actually showed a decrease in plant growth and yield when compared with 20gal/acre.

Graphs and Data Tables:


Plant Height (inches) across Time



Total Nodes across Time


Height to Node Ratio (inches) across Time


Lbs of Lint/Acre Machine Harvest


Lbs of Lint/Acre Hand Harvest


Lbs of Lint/Acre on a Per Plant Basis


Box Mapping:


Lbs/Acre Across Positions On The Main Fruiting Axis


Lbs lint cotton/AC of main axis fruiting sites compared to vegetative branches

Pounds Lint Cotton/AC of Main Axis Fruiting Sites Compared To Vegetative Branches

Lbs Lint Cotton/AC Across Zones

Pounds Lint Cotton Per Acre Across Zones
Accumulated Lbs. lint cotton/ac. across time and position

Accumulated Pounds Lint Cotton Per Acre Across Time and Position