OPTIMUM RATIOS OF NITROGEN AND PHOSPHORUS FERTILIZERS FOR CORN DETERMINED BY HOMÈS’ METHOD OF SYSTEMATIC VARIATIONS

1970 ◽  
Vol 50 (2) ◽  
pp. 141-150
Author(s):  
ERIC G. BEAUCHAMP ◽  
H. A. HAMILTON
Keyword(s):  
Dry Matter ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Maximum Yield ◽  
Plant Tissues ◽  
Corn Plant ◽  
Replacement Series ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Fertilizers ◽  
P Fertilizers

A greenhouse experiment was carried out to investigate the possibility of an optimum N/P ratio for sweet corn (Zea mays L.), using Homès’ method of systematic variations.Three levels of N and P fertilizers were applied to a soil. Each level was comprised of nine fertilizer treatments differing only in N/P ratio in a replacement series. Accordingly, the three levels represented 8.12, 16.04, and 32.02 meq per 4.4 kg soil of NO3− plus H2PO4−, respectively.There appeared to be a definite N/P ratio of fertilizer which resulted in a maximum yield and which was similar for all three levels of the replacement series of N plus P. However, this effect was most pronounced at the highest level of N plus P. The Homès method for determining the optimum N/P ratio of a fertilizer was successful primarily at the highest level of N plus P.N/P ratios of corn plant tissues from about 9 to 18 coincided with maximum dry matter yields at the highest level of N plus P.

RESPONSE OF IRRIGATED FIELD AND SWEET CORN TO NITROGEN AND PHOSPHORUS FERTILIZERS IN SOUTHERN ALBERTA

1975 ◽  
Vol 55 (2) ◽  
pp. 137-143 ◽  
Author(s):  
J. B. BOLE ◽  
S. FREYMAN
Keyword(s):  
Dry Matter ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Systematic Design ◽  
Nitrogen And Phosphorus ◽  
Field Corn ◽  
Wide Range ◽  
Southern Alberta ◽  
P Fertilizer ◽  
Precise Assessment

A two-dimensional systematic design provided a precise assessment of the response of field and sweet corn (Zea mays L. cv. UH 106 and Yukon) to a wide range of fertilizer N and P levels. Both cultivars responded primarily to N, with only limited responses to P. Yield increased significantly with incremental N levels up to 100 kg/ha and slightly with increments of N up to 200 kg/ha. Total dry matter yields responded to higher levels of N than did grain yield, and field corn was more responsive to N fertilizer than was sweet corn. Yields were significantly lower with no P than with P fertilizer levels of 15 kg/ha or higher. The limited response to P was probably due to the moderate to high levels of residual fertilizer P in the soil.

scholarly journals Complex appreciation of agrotechnikal factors of sweet corn (Zea Mays L. convar. saccharata Koern.)

2010 ◽  
pp. 77-81
Author(s):  
Ádám Lente
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Plant Density ◽  
Sweet Corn ◽  
Maximum Yield ◽  
Research Station ◽  
Density Level ◽  
Chernozem Soil ◽  
Sowing Time ◽  
Late Sowing

Three agrotechnical factors (sowing time, fertilization, plant density) and the effect of two different genotypes on the yields of sweet corn was studied, in the dry and warm crop-year of 2009 on a chernozem soil in the County of Hajdúság. The experiments were carried out on the Látókép Research Station of Debrecen University. The experiment involved two sowing times (21 of April and 19 of May), six fertilizer levels (control, N30+PK, N60+PK, N90+PK, N120+PK, N150+PK) and two genotypes (Jumbo, Enterprise). Four plant density levels, 45 thousand ha-1, 55 thousand ha-1, 65 thousand ha-1 and 75 thousand ha-1 were used. In the early sowing time the highest yield was obtained with 65 thousand ha-1 plant density level and N120+PK treatment of Jumbo (18169 kg ha-1), while the maximum yield of Enterprise was 17818 kg ha-1 with 75 thousand ha-1 plant density level and N90+PK dose. In case of the late sowing time both hybrids gave the highest yield with 75 thousand ha-1 plant density level and N30 +PKtreatment, with a crop yield of 13143 kg ha-1 (Jumbo) and 14324 kg ha-1, ( Enterprise). 

RESPON TANAMAN JAGUNG MANIS (Zea Mays L.) TERHADAP PEMBERIAN PUPUK GUANO KELELAWAR DAN PUPUK GUANO WALET

2020 ◽  
Vol 11 (1) ◽  
pp. 33
Author(s):  
SELVY ISNAENI ◽  
SITI NURHIDAYAH
Keyword(s):  
Zea Mays ◽  
Experimental Design ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Block Design ◽  
Corn Plant ◽  
Organic Cultivation ◽  
Randomized Block Design ◽  
Experimental Garden ◽  
Bat Guano

Organic farming has become very important for the continuity of agriculture in Indonesia. In addition to harvesting organic crops is healthy, the process of organic cultivation is also an effort of farmers to make improvementets to soil quality. This research aim to determine how the response to the administration of various doses of bat guano fertilizer and guano swallow fertilizer on sweet corn plant by the addition of phosphate solvent microbes. The study was conducted in the experimental garden of the Faculty of Agriculture, Universitas Perjuangan Tasikmalaya. The experimental design used factorial randomized block design with 3 treatment of bat guano fertilizer dosage and 3 treatments of guano swallow fertilizer dosage, each treatment was repeated 3 times and each treatment was given phosphate solvent with the same dose. The result showed that there was an interaction between guano bat fertilizer and guano swallow at 6 and 8 week after planting leaves in the treatment of K0W1 (0 tons / ha bat guano + 2.5 ton / ha swallow guano) and K1W2 (2.5 tons / ha Bat guano + 3.75 tons / ha swallow guano), but there are no interaction on other parameters. There are no maximum doses for guano bats and guano swallow in the response of sweet corn plant.

Effects of nitrogen and phosphorus fertilizers and gypsum on a Danthonia caespitosa-Stipa variabilis grassland. 2. Residual response

1978 ◽  
Vol 18 (91) ◽  
pp. 262 ◽  
Author(s):  
GJ Tupper
Keyword(s):  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Control Level ◽  
Residual Effects ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Eastern Australia ◽  
Phosphorus Fertilizers ◽  
Residual Response ◽  
High Level

The residual effects of nitrogen and phosphorus fertilizers applied over four consecutive years and gypsum applied once only, were assessed over five years on a Danthonia caespitosa-Stipa variabilis grassland, growing on the semi-arid Riverine Plain of south-eastern Australia. Totals of 155 and 31 0 kg ha-1 of N, 100 and 200 kg ha-1 of P, and 3.34 and 6.68 t ha-1 of CaS0,. 2H2O had been added. The increase in dry matter production in response to nitrogen ceased one year after the last application of nitrogen fertilizer. After five years, grassland which had received 200 kg ha-1 of phosphorus and 6.68 t ha-1 of gypsum yielded 6500 kg ha-1 of dry matter, compared with 1300 kg ha-1 in the absence of fertilizers and gypsum. Legume growth was still suppressed five years after nitrogen fertilizer had been applied, but legumes increased production greatly in response to the previous phosphorus and phosphorus-gypsum treatments. Nitrogen content of the herbage averaged 2.1 per cent four years after the previous high level phosphorus treatment, compared with 1.6 per cent with the control after four years. It was unaffected by previous nitrogen fertilizer. Phosphorus content was reduced for the first three years after nitrogen fertilizer was last added, but was increased by phosphorus fertilizer to 0.28 per cent, compared with 0.1 8 per cent on the control, four years after phosphorus fertilizer was last added. Soil moisture characteristics, and total soil nitrogen and carbon showed no differences between treatments. The Truog phosphorus in the soil under the high phosphorus level decreased from 103 p.p.m. to 53 p.p.m., compared with the unaltered control level of 7 p.p.m, over the five year period.

scholarly journals PERKEMBANGAN Spodoptera frugiperda J.E Smith PADA TANAMAN JAGUNG MANIS (Zea mays L. Saccharata)

2021 ◽  
Vol 6 (2) ◽  
pp. 104
Author(s):  
Wilyus Wilyus ◽  
Hamdan Maruli Siregar ◽  
Rizki Aulia
Keyword(s):  
Spodoptera Frugiperda ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Population Development ◽  
Corn Plant ◽  
Plant Parts ◽  
Plant Pests ◽  
Corn Plants ◽  
The Right ◽  
The Relationship

This study was conducted to determine the relationship between sweet corn plant phenology and population development and the attack of Spodoptera frugiperda. The research was carried out at the Research Farm and at the Laboratory of Plant Pests, Faculty of Agriculture, Jambi University. The study was conducted on an area of 500 m2 containing 28 plant plots. The sample plants consisted of 4 plots determined systematically. In each sample plot, all plants were used as sample.  plants to calculate the percentage of attacked plants, and the percentage of attacked cobs. S. frugiperda population observations were carried out directly on leaves, stems, flowers and cobs. If there were S. frugiperda faeces on the shoots, stems, and cobs, destructive observations were made where the plant parts were opened, to determine the presence of S. frugiperda in them. The data obtained were tabulated and arranged in the form of tables and figures, then explained descriptively. The results showed that: the population of S. frugiperda in each growth phase continued to increase, the highest population of S. frugiperda was found in the R6 phase or in the physiological ripening phase, which was as many as 21 heads per 12 corn plants; the percentage of attacks of S. frugiperda in each phase continues to increase, the highest percentage of attacks is in phase R6, which is 78.72%;  the attack of S. frugiperda on cobs began to be seen in the R2-R5 phase and was highest in the R6 phase, which was 68.57%. It is necessary to find the right way to control S. frugiferda.

scholarly journals Effect of Critical Period of Weed Competition and Its Management Option in Sweet Corn [Zea mays (L.) var. saccharata strut] Production: A Review

2021 ◽  
Author(s):  
Arebu Hussen
Keyword(s):  
Zea Mays ◽  
Weed Management ◽  
Critical Period ◽  
Zea Mays L ◽  
Sweet Corn ◽  
Maximum Yield ◽  
Weed Competition ◽  
Management Option ◽  
Medicinal Uses ◽  
Wide Range

Sweet corn [Zea mays (L.) var. saccharata strut] is the most important variety of maize with high sugar content. It contains a glossy sweetish endosperm and primarily grown for human food. It requires moderately high temperature from 22oC up to 33oC, high light intensity and adequate and well distributed rainfall of not less than 200mm during growing season. It can be grown on the wide range of soils. However, it performs best on neutral, well drained, well aerated and moderately heavy, deep fertile soils. Sweet corn is not so much competing with weeds like other crops. Avoid the influence of weed competition on the growth and development of sweet corn produce maximum yield and the economic importance of sweet corn used for conception and health benefits. By so far it is good in health and as medicinal uses it should be managed without affecting by weeds. The weed management option properly controls by the method of mechanical, biological, chemical and integrated weed management. In general, it is significant that properly controlling critical period weed competition in sweet corn reducing the competition of light, water, nutrient and space and maximizing the yield of sweet corn.

The effects of superphosphate on the growth and development of Townsville stylo (Stylosanthes humilis) in pure ungrazed swards at Katherine, NT

1970 ◽  
Vol 10 (47) ◽  
pp. 716 ◽  
Author(s):  
MJ Fisher
Keyword(s):  
Growth And Development ◽  
Dry Matter ◽  
Maximum Yield ◽  
Wet Season ◽  
Nitrogen And Phosphorus ◽  
Stylosanthes Humilis ◽  
Relative Water ◽  
Townsville Stylo ◽  
Four Levels ◽  
Yield Responses

The effects of four levels of superphosphate (0, 112, 224, and 448 lb an acre) on the growth and development of ungrazed Townsville stylo (Stylosanthes humilis) in pure swards were examined on virgin Tippera clay loam at Katherine, N.T. Yields and distribution of dry matter, nitrogen, and phosphorus, leaf area, and growth rate, were measured every two weeks. Leaf relative water content and soil water extraction were measured at the end of the wet season. Yield responses to superphosphate were curvilinear and fitted regressions of the form y = a nx + bx + c at all harvests. Superphosphate encouraged root exploitation of the soil volume, but phosphorus deficient swards were more resistant to drought. The maximum recovery of phosphorus was 20, 14, and 14 per cent respectively when 112, 224, and 448 lb an acre superphosphate was applied. Loss of 31 per cent dry matter, 34 per cent nitrogen, and 44 per cent phosphorus in the eight weeks following maximum yield was concluded to be due to translocation to the root system. Even with 448 lb an acre superphosphate the phosphorus content of standing material was below the the critical percentage quoted in the literature as indicating phosphorus sufficiency.

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