scholarly journals Effects of Combined Application of (s)-(+)-Abscisic Acid and Gibberellin A3 on Plant Growth, Flowering and Levels of Nitrogen, Phosphorus and Potassium in Cymbidium.

1998 ◽  
Vol 10 (1) ◽  
pp. 27-33
Author(s):  
Xinshu ZHENG ◽  
Yasuo KAMURO ◽  
Shuichiro MATSUI
Keyword(s):  
Abscisic Acid ◽  
Plant Growth ◽  
Gibberellin A3 ◽  
Combined Application ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Studies in oil-seed crops I. Factors controlling seed production in linseed (Linum usitatissimum)

1951 ◽  
Vol 41 (3) ◽  
pp. 256-270 ◽  
Author(s):  
G. E. Blackman ◽  
E. S. Bunting
Keyword(s):  
Field Experiments ◽  
Linseed Oil ◽  
Mineral Nutrient ◽  
Seed Composition ◽  
Yield Level ◽  
Combined Application ◽  
Phosphorus And Potassium ◽  
Seed Crops ◽  
Nitrogen Phosphorus ◽  
Oil Seed Crops

Between 1941 and 1946 some twenty-five field experiments were carried out at various centres in England to assess the factors which determine the yield level and seed composition of linseed (oil flax). The experiments were of multifactorial design, and the main variables studied were varietal differences, levels of mineral nutrient supply and plant population. Additions of nitrogen (35 lb./acre) over all experiments raised the yield of seed by 10%, whereas additional phosphorus (50 lb. P2O5/acre) or potassium (80 lb. K2O/acre) had small and inconsistent effects. A significant interaction between nitrogen and variety was recorded in one trial, but in twelve out of fourteen experiments the varieties reacted uniformly to a combined application of nitrogen, phosphorus and potassium, while in the remaining two experiments the interactions were contradictory.

EFFECTS OF NITRATE SUPPLY ON PLANT GROWTH, NITROGEN, PHOSPHORUS AND POTASSIUM ACCUMULATION, AND NITRATE REDUCTASE ACTIVITY IN CRAMBE

2013 ◽  
Vol 36 (2) ◽  
pp. 275-283 ◽  
Author(s):  
Diego de Mello Conde de Brito ◽  
Carlos Diego dos Santos ◽  
Fabíola Vieira Gonçalves ◽  
Rosane Nora Castro ◽  
Sonia Regina de Souza
Keyword(s):  
Nitrate Reductase ◽  
Plant Growth ◽  
Nitrate Reductase Activity ◽  
Reductase Activity ◽  
Potassium Accumulation ◽  
Nitrate Supply ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

scholarly journals Effects of reduced application of special organic fertilizers on tea production

2021 ◽  
pp. 939-945
Author(s):  
Jinbao Liu ◽  
Minghui Jin ◽  
Zhongan Mao
Keyword(s):  
Organic Fertilizer ◽  
Economic Benefits ◽  
Organic Fertilizers ◽  
Treatment Results ◽  
Yield Increase ◽  
Combined Application ◽  
Tea Production ◽  
Phosphorus And Potassium ◽  
Tea Plants ◽  
Nitrogen Phosphorus

A trial of special fertilizer reduction and combined application of organic fertilizer on tea production, nutrients and economic benefits was carried out in the tea garden at Shihe Port, Xinyang, Henan Province, China. The experiment has six treatments of customary fertilization (CK), 100% special fertilizer for tea (T1), nitrogen reduction 20% (T2), 40% (T3), 60% (T4) and 100% (T5), and special fertilizers at the same time. Among the special fertilizer treatments for tea plants, the germination density, 100-bud weight, fresh tea yield, N, P, and K content of new shoots and economic benefits were the highest in T1 treatment, Results showed that the yield range of the five treatments was 460～632.4kg hm2. Compared with CK, the yield increase rates were 6.11, 1.99, -4.21, -13.76 and -22.82%, respectively. The growth rates of barber bud density and 100-bud weight were -20.00～25.83 and 8.40～ 8.40%, respectively. The content of nitrogen, phosphorus and potassium in the new shoots varied by 0.623～1.070, 0.047～0.183 and 1.380～2.237%, respectively. Therefore, the special fertilizer for tea plants can reduce the nitrogen by 20% to save costs and increase efficiency. Bangladesh J. Bot. 50(3): 939-945, 2021 (September) Special

scholarly journals The influence of mineral and bacterial fertilization on the number of fungi in soil under maize

2011 ◽  
pp. 205-212
Author(s):  
Aleksandra Stanojkovic ◽  
Dragutin Djukic ◽  
Leka Mandic ◽  
Bogic Milicic
Keyword(s):  
Grain Yield ◽  
Fungal Growth ◽  
Sampling Period ◽  
Mineral Fertilizers ◽  
Dilution Method ◽  
Npk Fertilizers ◽  
Nutritive Medium ◽  
Combined Application ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The aim of this study was to evaluate the influence of an application of different rates of mineral fertilizers and their combination with associative N-fixing Klebsiella planticola and Enterobacter spp., and sampling period on the number of fungi in Cambisol and grain yield of maize. The investigation was conducted on Mladenovac experimental station and in the Laboratory of Institute of Soil Science, Belgrade, during 2006. Unfertilized soil was used as the control soil. Each of the studied variants was carried out in three replications. The effect of the studied fertilizers was determined three times during the maize growing season, the number of fungi being determined by indirect dilution method on Czapek nutritive medium. The results of the study showed that all fertilization variants studied influenced, more or less, fungal growth in the study soil. However, the applied high content of mineral nitrogen, phosphorus and potassium, as well as their combination with bacterial inoculants brought about the highest increase in the number of fungi during all studied vegetation periods of maize. The highest increase in the number of soil fungi was registered in the second sampling period. The highest increase in the grain yield of maize was obtained by combined application of microbial inoculants and high rates of mineral NPK fertilizers.

THE EFFECT OF LIME ON THE STATUS OF NITROGEN, PHOSPHORUS, POTASSIUM, CALCIUM AND MAGNESIUM IN A FEW VEGETABLES GROWN ON ACID PEAT SOILS

1962 ◽  
Vol 42 (3) ◽  
pp. 445-451
Author(s):  
J. J. Jasmin ◽  
H. B. Heeney
Keyword(s):  
Plant Growth ◽  
Soil Ph ◽  
Available Phosphorus ◽  
Peat Soils ◽  
The Status ◽  
Calcium Magnesium ◽  
Lime Application ◽  
Calcium And Magnesium ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

A 2-year study on acid dome bogs has shown that 9 tons of agricultural limestone was preferable to 3 tons for onions and carrots. Yields of potatoes were not increased with lime applications above 3 tons per acre under the conditions of this test.Increments in lime application increased soil pH and available phosphorus and decreased the exchangeable potassium.Increments in lime application reduced the total nitrogen, phosphorus and potassium present in the plant tissue at time of sampling and increased calcium. Magnesium was not affected.Unless adequate lime is applied, high quantities of fertilizer may be detrimental to plant growth.

scholarly journals Fuzzy Logic Tool to Forecast Soil Fertility in Nigeria

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
G. O. Ogunleye ◽  
S. G. Fashoto ◽  
Petros Mashwama ◽  
S. A. Arekete ◽  
O. M. Olaniyan ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Plant Growth ◽  
Soil Fertility ◽  
Soft Computing ◽  
Soil Test ◽  
Soft Computing Method ◽  
Phosphorus And Potassium ◽  
Computing Method ◽  
Nitrogen Phosphorus ◽  
Effective Growth

The soil is composed of several nutrients which are important for the effective growth of plants. Nitrogen, phosphorus, and potassium are micronutrients which are very important for plant growth. There have been several methods and soil tests developed to test the compositions of these nutrients in the soil. Interpreting the results gotten from such tests has been a herculean task for farmers. Employing the use of a soft computing method to interpret such result would be a noble idea. In this paper, we describe the use of fuzzy logic to interpret the values of nitrogen, phosphorus, and potassium (NPK) gotten from conventional soil test to know their levels in the soil and predict possible NPK inputs.

The strawberry yield and the contents of the main macronutrients in the soil of plantations with different fertilizer and drip irrigation

2020 ◽  
Vol 62 ◽  
pp. 165-171
Author(s):  
L. V. Pomyaksheva ◽  
S. N. Konovalov ◽  
A. V. Kelina
Keyword(s):  
Drip Irrigation ◽  
Maximum Yield ◽  
Weather Conditions ◽  
Mineral Fertilizers ◽  
Optimal Method ◽  
Podzolic Soils ◽  
Combined Application ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The purpose of research was to determine the optimal method of applying mineral fertilizers with drip irrigation in strawberry plantations and the level of available forms of nitrogen, phosphorus, and potassium in sod-podzolic mediumloam soil. The studies were carried out on strawberries of Honeyoe and Troitskaya varieties, the experiment was two-factor, the replicates were isolated. The determination of NPK in soil and pH were performed according to the generally accepted recommendations for sod-podzolic soils. Weather conditions during the years of research were sufficiently diverse and determined the irrigation rates of plantings. The results showed that the maximum yield of strawberries (13.3 t / ha) is possible with combined fertilization in reserve and with fertigation, but with fertigation, the yield is stable and varies least of all. The highest content of alkaline hydrolysable-nitrogen and plant-available potassium in the average over the years of research was observed in the variant with fertilization in reserve. It has been established that the most optimal way to fertilize strawberries with drip irrigation is a combined application. Drip irrigation accelerates the mineralization of organic nitrogen. Doses of mineral fertilizers should be increased with the age of plantings, while taking into account the level of basic macronutrients in the soil.

scholarly journals Performance of Cassava (Manihot esculenta Crantz) Varieties under Different Soil Amendments

2019 ◽  
pp. 1-7
Author(s):  
Kwadwo Gyasi Santo ◽  
Joseph Sarkodie-Addo
Keyword(s):  
Starch Content ◽  
Block Design ◽  
Organic Fertilizer ◽  
Poultry Manure ◽  
Fertilizer Application ◽  
Nitrogen And Phosphorus ◽  
Manihot Esculenta Crantz ◽  
Combined Application ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Studies were carried out at Offinso in the Ashanti Region of Ghana to assess root quality of cassava grown with application of poultry manure and NPK 15-15-15 and NPK 23-10-10 fertilizers. The experimental design was a 2 x 6 factorial, arranged in a Randomized Complete Block Design (RCBD) with three replications. The treatments consisted of two cassava varieties in combination with five inorganic and/or organic fertilizer formulations and a control with no fertilizer. The parameters measured were starch content, poundability, nitrogen, phosphorus and potassium contents of cassava roots. The data collected were subjected to analysis of variance using the Genstat Statistical package. The results of the study indicated that Bankyehemaa produced higher starch content (29.86%) than the Nkabom variety. Fertilizer application increased starch content with the combined application of poultry manure and NPK 23-10-10 treatment recording the highest treatment effect (30.40%). Both the organic and inorganic fertilizers applied increased starch content of cassava roots. Poundability was not also affected by both variety and fertilizer application. However, roots treated with NPK 15-15-15 only and poultry manure alone were very poundable (3.0). Variety significantly affected only nitrogen and phosphorus contents of cassava roots. Bankyehemaa had higher content (0.72%) of nitrogen than Nkabom, while Nkabom recorded higher content (1.05%) of phosphorus than Bankyehemaa. Generally, application of fertilizer significantly affected root contents of nitrogen, phosphorus and potassium. However, potassium and phosphorus contents were reduced by the organic fertilizer (poultry manure). The NPK 15-15-15 treatment produced higher potassium (9.37%) and phosphorus (1.36%) contents of roots than the other treatments. The highest nitrogen content of roots (0.78%) was observed in the combined application of poultry manure and NPK 23-10-10 treatment.

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