Author: Ronald Edward PeacheyPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Effect of Pop-up Fertilizers and Planting Density on Early Season Sweet Corn Growth and Ear Yield
Author: Ronald Edward PeacheyEffect of Nitrogen Rates, Row Spacings and Population Densities on Yield and Ear Characteristics of Sweet Corn
Author: Abdulameir Ali YassenPublisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 152
Book Description
The response of sweet corn Zea mays L. var. rugosa (cultivar 'Jubilee') to row spacing, nitrogen and population density at two planting dates was studied in a field experiment at the OSU Vegetable Research Farm in 1984. Variables included two row spacings, 75 cm and 90 cm, three nitrogen rates, 150, 200, 250 kg/ha, and seven plant population densities, 49,400; 55,575; 61,750; 67,925; 74,100; 80,275 and 86,450 plants/ha. Population density showed a greater effect on yield (unhusked total and husked good), number of ears/plant, stalk diameter, ear weight, ear length, usable ear length, ear diameter and tipfilling of ears than did nitrogen rates and row spacing. Effects of row spacings and nitrogen rates were generally not significant. Total unhusked yield and yield of husked good ears increased 16 to 20% for the early planting and 22 to 24% for the late planting as plant density increased from 49,400 to 86,450 plants/ha. Ear weight of the first ear decreased 10% in the early planting and about 15% in the late planting as plant density increased from the lowest to the highest. Although characteristics of second ears were affected by plant population density, their contribution was only 3-16% of the total yield. Longer ears and higher ear weights were associated with the lower plant densities. Stalk diameter was reduced, plants were taller, and average number of ears per plant was reduced at higher densities. No significant interactions between the variables studied in the experiment were observed on any of yield or plant and ear characteristics measured.
The Effects of Planting Date, Nitrogen and Boron Application on Mineral Element Concentration, Yield, Dry Weight and Fresh Weight of Sweet Corn
Author: Jonathan Anthony SissonPublisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 116
Book Description
The effects of planting date on mineral element concentration in sweet corn (Zea mays L. cv. Jubilee) at six developmental stages and on yield were investigated. Planting dates were chosen to correspond to early, mid-season, and late commercial plantings. Two nitrogen rates were applied since nitrogen is more often limiting than any other nutrient for sweet corn grown in Western Oregon. Boron was also applied since it has been shown to be limiting in many other crops grown in the Willamette Valley. Planting date significantly affected N, P, K, Ca, Mg, Mn, Fe, Cu, B, and Zn concentration in the whole plants during the vegetative growth stages and in the ear leaves during the stages between tasseling and harvest. During the early stage of growth, N, P, K, Ca, Mg, B, and Zn tended to be higher in the early planted corn plants, while later in the development of corn the effects of planting date were more variable. Planting date also affected the fresh and dry weight of whole plants; the later planting produced more dry weight than the earlier two plantings, while the early planted corn produced more fresh weight at harvest than the later two plantings. Consequently, when analyzing sweet corn for nutritional status, date of planting should be considered when interpreting the plant analysis data. The application of B had no effect on yield, fresh weight or dry weight and only increased B concentration at the first developmental stage. The additional application of N, did not significantly increase yield for the late planted corn, but did for early planted corn. N concentration, as well as Mg, Mn, Cu, and Zn concentrations increased with the higher rate of N fertilizer applied (125 kg/ha). Fresh weight and dry weight were both higher in the plants receiving the higher rate of N, with the difference becoming greater as the plants matured.
The Effects of Genotypes, Fertilizer and Plant Population on the Yield of Corn
Author: Rusli Marah HakimPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 226
Book Description
Effect of Fertilizer and Moisture on the Growth and Yield of Sweet Corn
Author: Howard Boyd PetersonPublisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 28
Book Description
Pests and Yield of Sweet Corn
Author: Rola Michel AtiyehPublisher:
ISBN:
Category : Nitrogen fertilizers
Languages : en
Pages : 142
Book Description
An experiment was conducted in 1992 at the Agricultural Research and Education Center {AREC) of the American University of Beirut, Lebanon, to determine the effect of three planting dates (May 7, 21, and June 4) and three nitrogen levels (0, 100, and 200 Kg/ha) on population growth of corn leaf aphid, Rhopalosiphum maidis (Fitch), percent corn borer, Sesamia cretica Led., and corn earworm, Heiicoverpa armigera (Hubn.t, infestation, and yield components of sweet corn.Aphid populations were recorded at 12-leaf, tassel, silk, blister, and milk stage. Aphids were counted on one leaf chosen from lower, middle and upper 1/3 of the plant. Results revealed that the aphid population was not affected by planting date, but was significantly higher at silk stage, when nitrogen was not applied (8.18 aphid/leaf), with higher number of aphids (8.29/leaf) occupying the upper leaves (upper 1/3) of the plant. Stalk infestation by corn borer was very low (0.96%). Early planting of sweet corn resulted in higher percent (8.87) of ear infestation (by corn borer and corn earworm) which decreased with each delay in planting from May 7 to June 4. Emergence, plant height, total number of tillers, number of fertile tillers, number of ears per tiller, percent seed moisture, total ear weight, and biological yield of sweet corn were not significantly affected by the treatments. Early planting of sweet corn resulted in the highest, averaged over nitrogen levels, total ear weight (12940.3 Kg/ha), number (23500/ha) and weight (6634.3 Kg/ha) of marketable ears , percent marketable ears (32%), and harvest index (0.19), but decreased as planting was delayed. Increase in nitrogen level f rom 0 to 100 Kg/ha resulted in significant increase in number and weight of marketable ears. As nitrogen level was increased from 100 to 200 Kg/ha, number and weight of marketable ears decreased. Total number and weight of non-marketable ears ( diseased, immature, infested, or not fitting the standards of marketability) were not significantly affected by the treatments. However, number of diseased ears increased while number and weight of infested ears decreased as planting was delayed.
The Effect of Planting Date, Hybrid, Row Spacing, and Starter Fertilizer on Corn Growth and Development
Author: Philip Sheridan RamselPublisher:
ISBN:
Category :
Languages : en
Pages : 442
Book Description
This experiment was conducted during the 1999 and 2000 growing seasons at the Iowa State University Sorenson Farm located southwest of Ames, Iowa and at the Iowa State University North Central Research and Demonstration Farm located south of Kanawha, Iowa. The experimental design for both locations was a randomized complete block with a split-split-split plot design and three replications of each treatment. Treatments included three planting dates, three hybrids, two row spacings, and two fertility regimes. Whole plot treatment was planting date and split plot treatments were hybrid, row spacing, and fertility regime. Significant difference was found between row spacing treatments for yield with the June planting dates in 1999 with 38-cm row spacing yielding more than 76-cm row spacing. Significant difference was not found between row spacing treatments for yield at the other planting dates in 1999 or in 2000. As planting date was delayed, weight kernel−1 decreased at both locations in both years. Starter fertilizer produced significantly higher yields in 1999, with a cold and wet spring, but not in 2000 with a warm and dry spring. Producers should rely on calendar date recommendations in determining optimum planting date. Planting dates between late April to early May should result in maximum yields in most years. Starter fertilizer may provide benefits during a cold and wet spring as well in situations of a low soil test for P or K.
The Effect of Time of Nitrogen Application on the Yield
Author: Patrick Bioma KiadiiPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 144
Book Description
The Relation of Spacing to Yield and to Plant and Ear Development of Some Yellow Sweet Corn Hybrids in New York
Author: Walter Denton EnziePublisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 28
Book Description
Commercial Growing of Sweet Corn
Author: Elbert Van WannPublisher:
ISBN:
Category : Corn
Languages : en
Pages : 24
Book Description
"Sweet corn is grown commercially in more than 30 states. Growers have two outlets for their product -- processing plants and the fresh market. Requirements for growing high-yielding, high-quality crops for both outlets are practically the same."--Page 1.