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Effects of Nitrogen Rate and Time of Planting on the Yield of Three Types of Corn

N. H. Khan
Department of Agronomy, Bangladesh Agricultural University, Mymensingh.

M. A. Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh.

M. L. Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh.

Abstract/ Executive Summary:

Different nitrogen rates (67.2, 134.4 and 201.6 kg/ha) and dates of planting (1 st November, 16th November and 1 st December) were studied on the grain yield of three types of corn (Flint corn, sweet corn and pop corn) at the Bangladesh Agricultural University Farm during the winter season of the year 1970-71. The result showed that Flint corn on first November planting with 134.4 kg N/ha recorded the highest grain yield (4915 kg/ha) followed by pop corn and sweet corn respectively under identical conditions. Late planting after first November with both lower and higher doses of nitrogen than 134.4 kg/ha were not effective on the grain yield of the three types of corn.

Keywords: Corn, Nitrogen Rate, Grain yield

Location: Bangladesh Agricultural University Farm, Mymensingh

Start Date: 00-11-1970

End Date: 00-04-1971

Program Area: Crop-Soil-Water Management

Commodity:

Objectives:

To find out the optimum nitrogen rate and time of planting on tne grain yield of different types of corn.

Methodology:

The experiment was conducted at the Bangladesh Agriculturai University Farm, Mymensingh, during the period from November 1970-April 1971. The texture of the soil was sandly loam with pH value 6.8 ( H₂0 1 :1.5). The nutrient status of the experimental soil was as follows:

Total-N 0.09%, available phosphate 0.08%, available potassium 1.18% as determined before the experiment in composite samples.

The experiment was laidout in splltplot design with 3 replications of each treatment combinations. Three variable factors were: (i) Nitrogen levels 67.20, 134.40 and 201.60 kg/ha (ii) Dates of planting 1st November, 16 November and 1 st December, and (iii) Types of corn-Flint Corn (Zea mays indurates), Sweet Corn (Zea mays saccharata) and pop Corn (Zea mays vertey).

Rates of phosphorus and potash were 100.80 and 67.20 kg/ha respectively for each treatment applied at planting. The land was manured with cowdung at the rate of 13 ton/he (65 kg N/ha). The nitrogen was applied 3 instalments, 1st dose at sowing, 2nd before flowering initiation and 3rd at tasseling (equal rate in each time). The inaividual plot size was 3.06m 1 x 3.67m = 11.2302 sq = 890.46 th hectare. The plant to plant spacing was 30.48 cm and row to row was 60.96 cm, accommodating 60 plants/plot. The crop was harvested excluding the border line but the per plot and per hectare yield was extrapolated on the basis of yield of harvested plants/plot. Data of the plant characters were recorded from 10 randomly selected plants/plot.

Source of Information: Bangladesh Journal of Agriculture, Vol-5, No-3, Sep-1980, Pag: 139-144

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result showed that Flint corn on first November planting with 134.4 kg N/ha recorded the highest grain yield (4915 kg/ha) followed by pop corn and sweet corn respectively under identical conditions. Late planting after first November with both lower and higher doses of nitrogen than 134.4 kg/ha were not effective on the grain yield of the three types of corn.

Knowledge Management: Journal