The Effects of Planting Date, Nitrogen and Boron Application on Mineral Element Concentration, Yield, Dry Weight and Fresh Weight of Sweet Corn PDF Download
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Author: Jonathan Anthony Sisson
Publisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 116
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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.
Author: Jonathan Anthony Sisson
Publisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 116
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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.
Author: Patrick Bioma Kiadii
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 144
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Author: Peter Jeranyama
Publisher:
ISBN:
Category : Companion crops
Languages : en
Pages : 120
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Author: Oregon State University
Publisher:
ISBN:
Category : Education
Languages : en
Pages : 64
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Author: Rola Michel Atiyeh
Publisher:
ISBN:
Category : Nitrogen fertilizers
Languages : en
Pages : 142
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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.
Author: Howard Boyd Peterson
Publisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 28
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Author: Alexander L. Henderson
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Author: Benjamin A. Brown
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 24
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1094
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Author: Abdulameir Ali Yassen
Publisher:
ISBN:
Category : Sweet corn
Languages : en
Pages : 152
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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.
