scholarly journals Nitrogen, Phosphorus, and Potassium Effects on Seeded Buffalograss Establishment

HortScience ◽  
2002 ◽  
Vol 37 (2) ◽  
pp. 371-373 ◽  
Author(s):  
Kevin W. Frank ◽  
Roch E. Gaussoin ◽  
Jack D. Fry ◽  
Michael D. Frost ◽  
James H. Baird
Keyword(s):  
Field Studies ◽  
Buchloe Dactyloides ◽  
Total N ◽  
Metsulfuron Methyl ◽  
Potassium Application ◽  
Phosphorus And Potassium ◽  
N Rates ◽  
Nitrogen Phosphorus ◽  
Establishment Rate

Field studies were conducted in Kansas, Nebraska, and Oklahoma in 1996 to evaluate the influence of nitrogen (N), phosphorus (P), and potassium (K) applied alone or in combination on the establishment rate of buffalograss [Buchloe dactyloides (Nutt.) Engelm.] from seed. `Cody' buffalograss burrs were planted at 98 kg·ha-1. Nitrogen was applied at 0 or 49 kg·ha-1 at planting and at 49 kg·ha-1 weekly or every other week for 5 weeks after seeding (WAS). The total N amounts applied were 0, 49, 147, or 294 kg·ha-1. Phosphorus and K were applied at rates of 0 or 49 kg·ha-1 at planting only. Percent buffalograss coverage ratings were taken weekly for up to 11 WAS. Buffalograss coverage was enhanced by N rates up to 147 kg·ha-1. Application of P improved buffalograss establishment at the Nebraska and Oklahoma sites but had no effect at the Kansas site. Potassium application had no influence on establishment at any site. Chemical names used: methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-amino]carbonyl]amino] sulfonyl]benzoate (metsulfuron methyl); 6-chloro-N,Ń-diethyl-1,3,5-triazine-2,4-diamine (simazine)

Effect of nitrogen, phosphorus and potassium application on yield of potato tubers (Solatium tuberosum L.)

1987 ◽  
Vol 108 (2) ◽  
pp. 321-329 ◽  
Author(s):  
U. C. Sharma ◽  
B. R. Arora
Keyword(s):  
Field Experiments ◽  
Sandy Loam ◽  
Farmyard Manure ◽  
Potato Tubers ◽  
Solatium Tuberosum ◽  
Loam Soil ◽  
Potassium Application ◽  
Phosphorus And Potassium ◽  
Grade Increase ◽  
Nitrogen Phosphorus

SummarySix field experiments, three each during 1982–3 and 1983–4, were conducted on a sandy loam soil to study the effect of varying levels of nitrogen, phosphorus and potassium, in the absence and presence of farmyard manure (FYM) (30 t/ha), on the number of tubers and yield of potato in three grades. Increase in nitrogen, phosphorus and potassium application, in the absence or presence of FYM, did not significantly affect the total number of tubers/m2 but did affect the number of tubers in different grades. An increase in nitrogen and potassium significantly decreased the number of tubers/m2 in small (< 25 g) and increased in medium (25–75 g) and large (> 75 g) grades at 45, 60, 75 and 90 days after planting. Increase in the application of phosphorus increased the number of tubers/m2 in the small grade and decreased it in the large grade but did not affect the number in the medium grade. Increase in nitrogen and potassium application decreased the tuber yield in the small grade and increased it in the medium and large grades. Applied phosphorus increased the yield in the small and medium grades and decreased it in the large grade. The increase in the yield of tubers with increase in nitrogen and potassium application was found to be caused by an increase in the number of tubers in the medium and large grades at the expense of the small grade; however, with applied phosphorus the increase in yield was due to increase in the weight of individual tubers within the small and medium grades. FYM application decreased the number of tubers in the small grade and increased it in the medium and large grades. The response of potato to nitrogen increased and to phosphorus and potassium decreased with the application of FYM.

scholarly journals Productivity and establishment of DRIS indexes for cultivation of potato cultivar Asterix tubers in a dystrophic Red Latosol

2019 ◽  
pp. 1017-1024
Author(s):  
Angélica de Araújo Queiroz ◽  
Atalita Francis Cardoso ◽  
Carolina Oliveira da Silva ◽  
Reginaldo de Camargo ◽  
Regina Maria Quintão Lana ◽  
...  
Keyword(s):  
Potato Cultivar ◽  
High Productivity ◽  
Relative Demand ◽  
Potato Culture ◽  
Limiting Nutrients ◽  
Phosphorus And Potassium ◽  
Red Latosol ◽  
N Rates ◽  
Nitrogen Phosphorus ◽  
Different Doses

The potato culture has the highest relative demand for fertilizers per unit area, around 2.3 to 2.8 t ha-1. The objective of this study was to evaluate the productivity of a potato Asterix cultivar subjected to different doses of nitrogen, phosphorus, and potassium, and to establish the DRIS index according to productivity results. The experimental design was randomized blocks, with 5 rates and 4 replicates for each nutrient totalizing 20 plots per experiment. The rates of nutrients were: nitrogen (0, 70, 140, 210 and 240 Kg ha-1); phosphorus (0, 200, 400, 600 and 800 kg ha-1) and potassium (0, 150, 300, 450 and 600 kg ha-1). For leaf diagnosis by the DRIS index, 10 complete leaves of the third expanded trifoliate were collected. The DRIS standards calculations were based on populations of high productivity (or reference) and low productivity. Plants whose productivities were greater than 22 t ha-1 represented the groups of reference. It was concluded that productivity was not influenced by the P and K doses studied, with an increase in yield of tubers as a function of the N rates applied, up to the dose of 173 kg ha-1 of N. According to the DRIS index, it is possible to establish the order of limiting nutrients for failure in descending order in areas with high productivity Ca> Mn> P> S> Zn = Cu> K> N> B> Fe> Mg, and the order of limiting nutrients in areas of low productivity Ca> Cu> Mg> P> S> Mn> Zn> K> Fe = B> N. The results showed that productions above 22 t ha-1 need adjustments of the soil fertility managements.

scholarly journals Soil fertility and agriculture yield with the application of organomineral or mineral fertilizers in solid and fluid forms

2018 ◽  
Vol 53 (5) ◽  
pp. 633-640 ◽  
Author(s):  
Juliano Corulli Corrêa ◽  
Agostinho Rebellatto ◽  
Marco André Grohskopf ◽  
Paulo Cezar Cassol ◽  
Paulo Hentz ◽  
...  
Keyword(s):  
Residual Effect ◽  
Mineral Fertilizers ◽  
Corn Yield ◽  
High Fertility ◽  
No Tillage ◽  
Total N ◽  
Avena Strigosa ◽  
P Content ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Abstract: The objective of this work was to evaluate the effects of organomineral and mineral fertilizers, in their solid and fluid forms, on soils with variable charges with high fertility built up from nitrogen, phosphorus, and potassium contents in the soil and plant, as well as on corn (Zea mays) and black oat (Avena strigosa) yield. The treatments consisted of one control and four fertilizers - two organomineral and two mineral - in solid (SO, solid organomineral; and SM, solid mineral) and fluid (FO, fluid organomineral; and FM, fluid mineral) forms applied in Rhodic Kandiudox and Distrochrept soils with no-tillage. The use of organomineral or mineral fertilizers in fluid and solid forms increases total N content in the soil, maintains exchangeable K content in both soils, and may enhance available P content to the depth of 0.6 m in Distrochrept. These factors allowed significantly increasing corn yield, regardless of the fertilizer, and establishing greater residual effect for fluid organomineral fertilizer in the winter black oat yield, even in soils with high fertility.

Enzyme Activities of Soils during the Reversal of Desertification

2012 ◽  
Vol 599 ◽  
pp. 865-869
Author(s):  
Jing Zhang ◽  
Pei Hou
Keyword(s):  
Alkaline Phosphatase ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Enzymes ◽  
Potassium Cation ◽  
Total N ◽  
Available N ◽  
Sand Land ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Desertification reversal is actually the change of shifting sand to more typical zonal soil. During the reversal process, soil properties has drastically changed, and assessment of these changes is essential for soil management and soil health. The activities of urease, alkaline phosphatase, invertase and catalase, soil organic matter, total nitrogen, phosphorus and potassium, available nitrogen, phosphorus and potassium, cation exchange capacity (CEC) contents of soils during reversal of desertification were investigated, and multivariate analysis was used to study the relationship between soil enzymes and soil physical-chemical properties. The results showed that urease activity, alkaline phosphatise activity and invertase activity were significantly higher from fixed sand land to semi-fixed sand land to semi mobile-sand land to mobile sand land. Soil organic matter had significant positive correlation with activities of invertase, urease and alkaline phosphatase. Soil organic matter, total N and available N were the major factors influencing activities of soil enzymes.

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