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Artykuły w czasopismach na temat „K fertilizer”

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Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Wang, Manman, Youliang Ye, Xv Chu, et al. "Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications." HortScience 57, no. 1 (2022): 72–80. http://dx.doi.org/10.21273/hortsci15984-21.

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Potassium (K) is a critical plant nutrient that determines quality in a myriad of crops and increases production yields. However, excessive application of various types of K fertilizers can decrease both the food quality and yields, which translates as economic losses and food safety issues. The objectives of this study were to 1) elucidate the impacts of different application rates of various K fertilizers on garlic, with the aim to identify the optimal and most economical K fertilizer dosage and 2) compare the effects of applying two common K fertilizers (KCl and K2SO4) on garlic, to determi

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Broschat, T. K., D. R. Sandrock, M. L. Elliott, and E. F. Gilman. "Effects of Fertilizer Type on Quality and Nutrient Content of Established Landscape Plants in Florida." HortTechnology 18, no. 2 (2008): 278–85. http://dx.doi.org/10.21273/horttech.18.2.278.

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In a series of three experiments, st. augustinegrass (Stenotaphrum secundatum ‘Floratam’), areca palm (Dypsis lutescens), canna (Canna × generalis ‘Richard Wallace’), pentas (Pentas lanceolata), allamanda (Allamanda cathartica ‘Hendersoni’), and nandina (Nandina domestica) were grown on highly leached sand soils in two locations in Florida. They were fertilized with typical turfgrass fertilizers having high nitrogen (N)-to-potassium (K) ratios and no magnesium (Mg), or several types of landscape palm fertilizers having low N:K ratios and 100% of their N, K, and Mg in controlled release form. S

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N’Dayegamiye, Adrien. "Response of silage corn and wheat to dairy manure and fertilizers in long-term fertilized and manured trials." Canadian Journal of Soil Science 76, no. 3 (1996): 357–63. http://dx.doi.org/10.4141/cjss96-043.

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Silage corn (Zea mays L.) and wheat (Triticum aestivum L.) were grown (1987–1991) in trials that had been manured and fertilized since 1978 to evaluate the effects of annual N, P, K and Mg fertilizers and dairy cattle manure on yields and nutrient uptake. Manure as the main factor was applied at 0 and 20 Mg ha−1 on a wet-weight basis. The subplots consisted of six fertilizer treatments: NK, PK, NP, NPK, NPKMg and the unfertilized control. For silage corn, fertilizer rates were 150, 100, 150 and 40 kg ha−1 N, P2O5, K2O and Mg, respectively. Fertilizer rates for wheat were 80, 100, 120 and 40 kg

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Broschat, Timothy K. "1032 EFFICIENCY OF FERTILIZATION METHODS ON ORNAMENTALS." HortScience 29, no. 5 (1994): 576c—576. http://dx.doi.org/10.21273/hortsci.29.5.576c.

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Spathiphyllum Schott. 'Mauna Loa Supreme' grown for 6 months in a fine sand soil or a 5 pine bark: 4 sedge peat: 1 sand medium (by volume) were fertilized with 7.6g N, 1.4g P, and 4.5g K/3.5-liter container by 4 different methods. The same raw fertilizer prills (21N-3P-12K) were applied weekly as a liquid, monthly as soluble granules, bimonthly as a lightly resin-coated fertilizer (Osmocote), or every 6 months as a heavily resin-coated fertilizer. All leachates were collected and were measured and analyzed weekly for N O3, PO4, and K. Spathiphyllum grew best in the sand soil with either of the

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5

Chu, Haiyan, Takeshi Fujii, Sho Morimoto, et al. "Community Structure of Ammonia-Oxidizing Bacteria under Long-Term Application of Mineral Fertilizer and Organic Manure in a Sandy Loam Soil." Applied and Environmental Microbiology 73, no. 2 (2006): 485–91. http://dx.doi.org/10.1128/aem.01536-06.

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ABSTRACT The effects of mineral fertilizer (NPK) and organic manure on the community structure of soil ammonia-oxidizing bacteria (AOB) was investigated in a long-term (16-year) fertilizer experiment. The experiment included seven treatments: organic manure, half organic manure N plus half fertilizer N, fertilizer NPK, fertilizer NP, fertilizer NK, fertilizer PK, and the control (without fertilization). N fertilization greatly increased soil nitrification potential, and mineral N fertilizer had a greater impact than organic manure, while N deficiency treatment (PK) had no significant effect. A

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Najm, Sahar Hamza, and Hayyawi Wewa Attia Al-Juthery. "Effect of Phosphorous, Potassium Nano-Fertilizers and Spraying of (Sepehr 4) Nano-Fertilizer and Carbon Nanotubes on the Growth and Yield of Rice (Oryza sativa L.)." IOP Conference Series: Earth and Environmental Science 1259, no. 1 (2023): 012016. http://dx.doi.org/10.1088/1755-1315/1259/1/012016.

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Abstract The purpose of this experiment is to compare the growth and yield of the Amber 33 cultivar of rice after being fertilised with nano-phosphorous and nano-potassium, as well as after being sprayed with carbon nanotubes and nano-synthetic fertiliser (Sepehr 4) (K+Fe+Zn+Mn). Between June 15 and November 23, 2022, researchers in Babylon province, Iraq, combed through the area known as District 41-Al-Hussainiya, which is located to the south of the city of Hilla. Using a Randomised Complete Blocks Design (RCBD), two levels of phosphorus and potassium nano-fertilizers (0 and 10 kg.ha-1) were

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Petrus, Auldry Chaddy, Osumanu Haruna Ahmed, Ab Majid Nik Muhamad, Hassan Mohammad Nasir, and Make Jiwan. "Effect of K-N-Humates on Dry Matter Production and Nutrient Use Efficiency of Maize in Sarawak, Malaysia." Scientific World JOURNAL 10 (2010): 1282–92. http://dx.doi.org/10.1100/tsw.2010.121.

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Agricultural waste, such as sago waste (SW), is one of the sources of pollution to streams and rivers in Sarawak, particularly those situated near sago processing plants. In addition, unbalanced and excessive use of chemical fertilizers can cause soil and water pollution. Humic substances can be used as organic fertilizers, which reduce pollution. The objectives of this study were to produce K- and ammonium-based organic fertilizer from composted SW and to determine the efficiency of the organic-based fertilizer produced. Humic substances were isolated using standard procedures. Liquid fertili

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Khoirya, Dinna, Nanik Setyowati, Zainal Muktamar, Kartika Utami, Marwanto, and Sumardi. "Utilizing Melastoma Compost (Melastoma malabatrichum L.) as a Sustainable Alternative to Synthetic Nitrogen Fertilizers in Shallot Cultivation." International Journal of Plant & Soil Science 37, no. 2 (2025): 170–79. https://doi.org/10.9734/ijpss/2025/v37i25316.

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Aims: This study explores the potential of Melastoma compost (Melastoma malabatrichum L.) as a sustainable alternative to synthetic nitrogen fertilizers in shallot (Allium ascalonicum L.) cultivation. Study Design: This study was conducted from July to October 2024 at the Green House of the Department of Crop Production, Faculty of Agriculture, Bengkulu University, Indonesia, at an altitude of 10 meters above sea level. Methodology: The experimental design was a Completely Randomized Design (CRD) with six treatments, each treatment was repeated 4 times. The treatments were: P0: No fertilizer;

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Maynard, Elizabeth T., Wenjing Guan, Petrus Langenhoven, and Lori Hoagland. "Tomato Seedling Performance in Five Commercial Organic Growing Media with and without Supplemental Fertilizer." HortTechnology 35, no. 4 (2025): 455–69. https://doi.org/10.21273/horttech05594-24.

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Commercially available growing media permitted for use in certified organic production differ substantially in quantity and availability of essential macronutrients. Nutrient availability from fertilizers applied during production will depend on chemical, biological, and physical characteristics of both media and fertilizers; therefore, best practices for fertilizing seedlings are likely to differ. This study evaluated tomato (Solanum lycopersicum L.) emergence, seedling growth, and posttransplant performance when grown in five organic growing media with and without supplemental fertilizer dur

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Rahutomo, Suroso, and Eko Noviandi Ginting. "LEACHING LEVEL OF N, P, K, AND SEVERAL TYPES OF FERTILIZER." Jurnal Penelitian Kelapa Sawit 26, no. 1 (2018): 37–47. http://dx.doi.org/10.22302/iopri.jur.jpks.v26i1.35.

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A study to compare amount of N, P, K, and Mg leached from fertilizers had been conducted. Leaching was measured using percolator tubes for six months. Subsoil of Inceptisol collected from an oil palm plantation in North Sumatra was used to fill the tube. Treatments were application of briquette compound fertilizer, granular compound fertilizer, and single fertilizer; all types of fertilizers contained equal amount of N, P, K, and Mg. The results showed that higher amount of leached N, P, and K were found under application of single fertilizers (urea, Triple Super Phosphate/TSP, and Muriate of

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11

Journal, Baghdad Science. "Effect of Saline water and Potash Fertilizer on some chemical constituents in Pisum sativum L.(Var.Senador Cambados) plant." Baghdad Science Journal 6, no. 2 (2009): 257–64. http://dx.doi.org/10.21123/bsj.6.2.257-264.

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Field experiment was conducted to test the effect of saline water and fertilizers rate on Pisum sativum L. plants . Treatments of the experiment included two levels of water salinity (2, 7 dSm-1) as a main plot and three levels of potash fertilization K2SO4 (44%K) namely 150 control, 300 and 450 kg/Donum as a sub plot. Results indicated that irrigation of plant with saline water 7 dSm-¹ caused a significant decrease in K and P contents specially in the upper parts of the plants , the percentage of the K increased (2.80%) under 2 dSm-¹of irrigation water and 300 kg/ donum fertilizer rate in the

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Hapsoh, I. R. Dini, Wawan, M. Rifa’i, and F. Khoiruddin. "Combination of inorganic and bio-organic fertilizer on growth and production of Paddy Rice (Oryza sativa L.)." IOP Conference Series: Earth and Environmental Science 1241, no. 1 (2023): 012036. http://dx.doi.org/10.1088/1755-1315/1241/1/012036.

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Abstract The excessive use of inorganic fertilizers by farmers in Riau Province is quite worrying about the decline in soil quality. Based on this, this study aims to obtain the best combination dose of inorganic fertilizer N, P, K with bio-organic fertilizer on the growth and production of rice. The research was conducted experimentally using a completely randomized design (CRD) consisting of 6 treatments and 4 replications so that 24 experimental units were obtained with the treatments being tested were P0= 100% inorganic fertilizer + petroganic; P1= 100% inorganic fertilizer; P2= 100% inorg

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Chen, Liqiang, Wenzhong Zhang, Jiping Gao, et al. "Effects of Precise K Fertilizer Application on the Yield and Quality of Rice under the Mode of Light, Simple, and High-Efficiency N Fertilizer Application during the Panicle Stage." Agronomy 12, no. 7 (2022): 1681. http://dx.doi.org/10.3390/agronomy12071681.

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Light, simple, and high-efficiency fertilization is currently an effective method used to improve quality and increase yield. Most research has only focused on the yield or quality of rice, and no effective or in-depth studies exist on the key stage of panicle, which is essential for these two aspects. This study aimed to determine the effect of applying Nitrogen (N) and Potassium (K) fertilizers on the yield and quality at different leaf ages. The rice cultivar, Shennong 265, was grown in the field-tube condition at the 5-leaf age with K fertilizer at different panicle stages. Five K fertiliz

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BONNEAU, X., IRFAN HARYANTO, and TRIYONO KARSIWAN. "COCONUT HUSK ASH AS A FERTILIZER FOR COCONUT PALMS ON PEAT." Experimental Agriculture 46, no. 3 (2010): 401–14. http://dx.doi.org/10.1017/s0014479710000025.

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SUMMARYWe demonstrated experimentally that coconut husk ash is an excellent mineral fertilizer for immature coconut hybrids on developed peat, providing potassium (K) in particular. Coconut husk ash performed as well as potassium chloride (KCl) in a proportion of 2–2.5 to 1. At four years, 99% of coconut palms fertilized with husk ash, 92% of coconut palms fertilized with KCl and 26% of control palms were sexually differentiated. The cumulative yield in the first two harvesting years more than trebled between control palms (26 nuts per tree) and the palms fertilized with KCl (93 nuts per tree)

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Hu, Wenjie, Jin Wang, Qunxian Deng, et al. "Effects of Different Types of Potassium Fertilizers on Nutrient Uptake by Grapevine." Horticulturae 9, no. 4 (2023): 470. http://dx.doi.org/10.3390/horticulturae9040470.

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Potassium (K) is the most important element for fruit quality improvement. This study aimed at determining the best K fertilizer type that can promote grape growth and nutrient uptake. Specifically, four types of K fertilizers (complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate) were applied to grapevines grown in plastic pots, and then their effects on grape growth and nutrient uptake were explored. Results showed that the complex fertilizer and potassium nitrate treatments increased the biomass of the grapevine plants, whereas the other fertilizers h

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Qin, Shasha, Feilong Rong, Manyun Zhang, et al. "Biochar Can Partially Substitute Fertilizer for Rice Production in Acid Paddy Field in Southern China." Agronomy 13, no. 5 (2023): 1304. http://dx.doi.org/10.3390/agronomy13051304.

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Biochar application has been confirmed as an efficient way to increase the productivity of the agricultural system. However, the potential of biochar combined with reducing fertilization on the yield, and the fertilizer utilization efficiency of the rice (Oryza sativa) farming system on acidic soil remains to be further studied. Field micro-plot experiments with two factors were performed in 2018 and 2019 to evaluate the responses of the rice yield and nutrient utilization to the combined application of biochar (60, 80, and 100 t/ha) and fertilizer reduction (70%, 85%, and standard doses of N-

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Van Gerrewey, Thijs, Christophe El-Nakhel, Stefania De Pascale, et al. "Root-Associated Bacterial Community Shifts in Hydroponic Lettuce Cultured with Urine-Derived Fertilizer." Microorganisms 9, no. 6 (2021): 1326. http://dx.doi.org/10.3390/microorganisms9061326.

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Recovery of nutrients from source-separated urine can truncate our dependency on synthetic fertilizers, contributing to more sustainable food production. Urine-derived fertilizers have been successfully applied in soilless cultures. However, little is known about the adaptation of the plant to the nutrient environment. This study investigated the impact of urine-derived fertilizers on plant performance and the root-associated bacterial community of hydroponically grown lettuce (Lactuca sativa L.). Shoot biomass, chlorophyll, phenolic, antioxidant, and mineral content were associated with shift

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Mashudi, Dadat, Oki Imanudin, and Aaf Falahudin. "Karakteristik Pupuk Organik Dari Pengolahan Limbah Peternakan Sapi Potong Di Kelompok Ternak Banteng Tani Di Kecamatan Losarang Kabupaten Indramayu." Tropical Livestock Science Journal 1, no. 2 (2023): 57–66. http://dx.doi.org/10.31949/tlsj.v1i2.4783.

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This research was conducted at the Banteng Tani Livestock Group, Losarang District, Indramayu Regency from February 20 to March 30, 2022. This study aims to analyze the quality of solid organic fertilizer (organic fertilizer) and liquid organic fertilizer (POC) from beef cattle farm waste in the livestock group. Banteng Farmer, Losarang District. This study uses a descriptive field experiment method, the observed variables are physical characteristics of organic fertilizers (color, texture, pH and temperature) and chemical characteristics of organic fertilizers including N, P and K content fro

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Boyhan, George E., Reid L. Torrance, and C. Randy Hill. "Effects of Nitrogen, Phosphorus, and Potassium Rates and Fertilizer Sources on Yield and Leaf Nutrient Status of Short-day Onions." HortScience 42, no. 3 (2007): 653–60. http://dx.doi.org/10.21273/hortsci.42.3.653.

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This is a compilation of several studies that were performed to address specific grower concerns or questions about onion fertilization, to assess onion fertility, to make adjustments in soil test recommendations, and to test specific fertilizers for clients covering the 1999–2000 to 2004–2005 seasons. The synthesis of these studies was to evaluate levels of nitrogen (N), phosphorus (P), and potassium (K) fertilizers and their effect on yield, graded yield, and leaf tissue nutrient status in short-day onions over 6 years. In addition, various fertilizers were evaluated for their effect on thes

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Ronga, Domenico, Mario Parisi, Luisa Barbieri, Isabella Lancellotti, Fernanda Andreola, and Cristina Bignami. "Valorization of Spent Coffee Grounds, Biochar and other residues to Produce Lightweight Clay Ceramic Aggregates Suitable for Nursery Grapevine Production." Horticulturae 6, no. 4 (2020): 58. http://dx.doi.org/10.3390/horticulturae6040058.

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The valorization of agro-industrial by-products is one of the key strategies to improve agricultural sustainability. In the present study, spent coffee grounds and biochar were used as pore forming agents in the realization of lightweight clay ceramic aggregates that were used as sustainable fertilizers, in addition to tailored glass fertilizer containing phosphorous (P) and potassium (K) and nitrogen (N) synthetic fertilizer, for nursery grapevine production. The obtained fertilizers were assessed in a pot experiment for the fertilization of bare-rooted vines. Unfertilized (T0) and fertilized

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Sofyan, Emma Trinurani, Oviyanti Mulyani, and Sonya Fauziyyah Putri Rusyana. "Effect of the Combination of Biofertilizer and N, P, K Fertilizer on C-Organic Content, Total Bacteria, Humic Acid, and Sweet Corn Results in Jatinangor Inceptisols." Journal of Agriculture and Ecology Research International 24, no. 3 (2023): 7–19. http://dx.doi.org/10.9734/jaeri/2023/v24i3527.

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Beneficial microorganisms are found in biofertilizers, which can assist in boosting the soil's availability of N, P, and K and promote plant growth. This study aims to ascertain the impact and optimal combination of biofertilizer and N, P, K fertilizers for sweet corn yields, total bacteria, humic acid, and C-organic yields. With 1 control treatment, 2 doses of N, P, K fertilizer, and 6 combinations of N, P, K fertilizer and biofertilizer, the method used Randomized Completely Block Design (RCBD). Three times each, the treatment was given. The findings indicated that biofertilizer and N, P, K

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Minh, Vo Quang, Le Van Khoa, and Nguyen Thi Phuong Dai. "Rice Yield Improvement by Sugarcane Filter Cake Fertilizer Application in the Protected Dyke." International Journal of Agronomy 2023 (February 10, 2023): 1–8. http://dx.doi.org/10.1155/2023/6811132.

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This study was carried out to evaluate the fertility of rice soil and the effect of inorganic fertilizers combined with sugarcane filter cakes on rice yield in a protected dike area in Cho Moi district, An Giang province. The experiment consists of 4 treatments, and the dose of fertilizer in each treatment is (1) controlled according to the farmers’ dosage (224 kg N + 148 kg P2O5 ha−1), (2) fertilize according to farmers + 6 tons/ha of cow manure composted with straw, (3) fertilizer according to farmers + 6 tons/ha of cow manure composted 15 cm deep, and (4) fertilize according to farmers + 2

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Liu, Jun, Qianwen Zhang, Joseph Masabni, and Genhua Niu. "Low Nitrogen Availability in Organic Fertilizers Limited Organic Watermelon Transplant Growth." Horticulturae 10, no. 11 (2024): 1140. http://dx.doi.org/10.3390/horticulturae10111140.

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Fertilization guidelines for organic watermelon transplant production are rare. We investigated the effect of four commercial organic fertilizers and seven organic fertilizer blends, along with one conventional fertilizer (Peter’s Professional 20-20-20) on watermelon transplants. The four organic fertilizers were Nature Safe (fertilizer label: 7-7-7), Miracle-Gro (8-8-8), Dr. Earth fertilizer tea (4-4-4), and Drammatic (2-4-1). The seven blended organic fertilizers were created by supplementing Drammatic with nitrogen (N)-rich and/or potassium (K)-rich fertilizers to balance its N:phosphorus (

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Mohapatra, Suchismita, Kumbha Karna Rout, Chandramani Khanda, et al. "Evaluation of Different Potassium Management Options under Prevailing Dry and Wet Seasons in Puddled, Transplanted Rice." Sustainability 15, no. 7 (2023): 5819. http://dx.doi.org/10.3390/su15075819.

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The present field experiment was conducted in both dry season (DS) and wet season (WS) from 2014–2015 to evaluate the influence of different potassium (K) management options (graded doses of inorganic K fertilizer alone and combined with foliar and straw incorporation) on the rice yield, nutrient uptake, and soil K balance under puddled, transplanted rice in acidic soil. The results showed that rice yields were higher under WS as compared to the DS crop. Among treatments, K40 + Kspray, i.e., the combination of inorganic K fertilizer (40 kg K2O ha−1) along with a foliar spray of K (1% KNO3) at

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Khoi Nghia, Nguyen, Chau Thi Anh Thy, Le Thi Xa, and Do Thanh Luan. "Recycling of biogas wastewater to organic fertilizers and influence of organic fertilizers on maize, mung bean growth and yield under the field conditions." Applied Environmental Biotechnology 7, no. 1 (2022): 16–27. http://dx.doi.org/10.26789/aeb.2022.01.003.

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The objective of the study was to utilize the biogas effluents to produce solid and liquid organic fertilizers, as well as evaluate their effect on the growth and yield of corn and mung beans under field conditions. For liquid organic fertilizer, biogas effluents were mixed with fish emulsion and beneficial bacteria while biogas effluents-absorbing coal slag was mixed with sugarcane filter, fishmeal and beneficial bacteria to create solid organic fertilizer. Liquid organic fertilizer was irrigated with a dose of 5 L/1000 m2 while solid organic fertilizer was applied with a dose of 1 ton/ha wit

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Wang, Jiyue, Zheli Ding, Arwa Abdulkreem AL-Huqail, et al. "Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils." Sustainability 14, no. 15 (2022): 9766. http://dx.doi.org/10.3390/su14159766.

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Arid degraded soils have a coarse texture and poor organic matter content, which reduces the activity of microorganisms and soil enzymes, and thus the soil quality, plant yield and quality decrease. Potassium solubilizing bacteria (KSB) have been suggested to increase the activity of soil enzymes and increase the release of potassium from natural K-feldspar in the arid degraded soil, and thus potentially reduce the rates of the application of chemical fertilizers. Field studies were conducted for three successive growing seasons in an organic farming system to investigate the effects of K-feld

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AL-Sheikh, Mohammad Ahmad, Omar Abdullah Abdulrazzak, and Taha Hammadi Al-Khalifa. "Effect of Adding Potassium and Organic Fertilizers on the Soil NPK Content and the Productivity of maize (Zea mays L.)." Kufa Journal for Agricultural Sciences 16, no. 3 (2024): 152–63. http://dx.doi.org/10.36077/kjas/2024/v16i3.15433.

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The integrated use of organic and mineral fertilizers is a practical and good way to preserve and sustain soil fertility, which results in increased availability of nutrients in the soil and their absorption by plants, thus increasing crop productivity. Due to the fixation of potassium in the soil, it is necessary to work to increase the vitality of agricultural soil by adding fertilizers. Organic potassium is an important means of increasing the availability of macro- and micro-nutrients. Current research was carried out in a private farm in Deir Ezzor province during the summer season of 202

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Gonzales-Plasus, Maria Mojena. "Growth and lipid levels of Tetraselmis tetrahele and Nannochloropsis sp. cultured under commercial fertilizers." Palawan Scientist 12, no. 1 (2020): 90–101. http://dx.doi.org/10.69721/tps.j.2020.12.1.07.

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Microalgae are aquatic photosynthetic organisms that contain high amounts of lipid and are potential sources of biofuels as well as feed additives for aquaculture. This study analyzed the growth and algal lipid content of two microalgae species (Tetraselmis tetrahele and Nannochloropsis sp.) using commercial fertilizers and nutrient enrichment. The samples were cultured for 5 days in 1 L dextrose bottles fertilized using Tongkang Marine Research Laboratory (TMRL) enrichment media, inorganic fertilizers such as 14-14-14, and a combination of 14-14-14 and 21-0-0. The relative growth rate of two

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McMillan, Chloé, Benoît Côté, and William H. Hendershot. "Short- and long-term nutritional effects and retention of potassium derived from fertilizer in a sugar maple stand in southern Quebec." Canadian Journal of Forest Research 45, no. 4 (2015): 487–95. http://dx.doi.org/10.1139/cjfr-2014-0395.

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The short-term (1–3 years) and long-term (23 years) effects of liming combined with potassium (K) fertilization on forest nutrition and K cycling were examined in a sugar maple (Acer saccharum Marsh.) stand in southern Quebec. Sugar maple leaves were sampled annually from 1988 (prefertilization year) to 1991 and in 2011–2012. Ten understory plant species, sugar maple sapwood, and soils were also sampled in 2012 and analyzed for K, calcium (Ca), magnesium (Mg), and rubidium (Rb). The recovery of fertilizer K was determined using the Rb/K reverse tracer method. Fertilization neither increased gr

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Verma, Himanshi, L. K. Srivastava, Gaurav Jatav, R. K. Banwasi, and Monika Tikariha. "Unravelling Soil-Crop Dynamics: Bridging Soil Test Fertilizer Dose with Rice Yield and Nutrient Optimization Strategies in Chhattisgarh Plains, India." Journal of Experimental Agriculture International 46, no. 7 (2024): 541–48. http://dx.doi.org/10.9734/jeai/2024/v46i72607.

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Efficient fertilizer management is imperative in modern agriculture to optimize yields and mitigate environmental impacts. This study investigates soil test-based fertilizer recommendations for rice cultivation, focusing on nutrient uptake, fertilizer adjustment equations, and nutrient contributions from soil, fertilizers, and farmyard manure (FYM). Field experiments were conducted in Raipur, India, with 24 treatment variations involving nitrogen (N), phosphorus (P), potassium (K), and FYM levels. Soil and plant analyses were performed to assess nutrient uptake and contributions. Results revea

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Siswanto, Shantosa Yudha, Rangga Wianggadana, Rachmat Harryanto, Ade Setiawan, and Marenda Ishak Sonjaya Sule. "Pengaruh Dosis dan Frekuensi Pemberian Pupuk Tunggal (N,P,K) dan Pupuk Majemuk NPK Terhadap N-Total, P-tersedia dan K-dd Padi Sawah (Oryza sativa L.) pada Inceptisols." soilrens 22, no. 2 (2025): 115–21. https://doi.org/10.24198/soilrens.v22i2.61738.

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The study was conducted to determine the effects of dosage and frequency of applying single fertilizers (N,P, K) and compound NPK fertilizers on total nitrogen (N-total) using lowland rice (Oryza sativa L.) grownin Inceptisols. The research was carried out in rice fields located in Ciparay, Jelekong Subdistrict, BaleendahDistrict, Bandung Regency. A Randomized Complete Block Design (RCBD) was employed, consisting of seventreatments with three replications: (1) Control, (2) Single NPK fertilizer (grade 123,75-36-50), Frequency3, (3) Compound NPK Pelangi fertilizer (grade 80-40-40), Frequency 3,

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Ibiremo, O. S., O. S. O. Akanbi, and C. E. Ogbeide. "Effect of Site-Specific Application of N and K Fertilizers on Cashew Growth and Yield in Ochaja, Kogi State, Nigeria." International Journal of Plant & Soil Science 35, no. 19 (2023): 1716–21. http://dx.doi.org/10.9734/ijpss/2023/v35i193719.

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An experiment was conducted at the Ochaja Substation of the Cocoa Research Institute in Ibadan, Nigeria. Ochaja is located in the guina savanna zone of Nigeria. Plantation soil nutrient requirements were determined prior to applying the required fertilizers. The soil was deficient in nitrogen (N) and potassium (K), with values of 0.41 g/kg soil and 0.012 cmol/kg soil, respectively, at depths 0–40 cm. This value was used to calculate cashew fertilization rates of 54 kg N/ha and 84 kg K2O/ha. Based on these values, four treatment combinations of two rates of nitrogen fertilizer and two rates o

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Pokhrel, Bhaniswor, Jorn Nygaard Sorensen, Henrik Bjarne Moller, and Karen Koefoed Petersen. "Processing methods of organic liquid fertilizers affect nutrient availability and yield of greenhouse grown parsley." Renewable Agriculture and Food Systems 34, no. 5 (2018): 430–38. http://dx.doi.org/10.1017/s1742170517000771.

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AbstractThe demand for organic foods is increasing globally, but a key limiting factor to the production of organic greenhouse produce is the lack of certified liquid fertilizers. In this experiment, four organic fertilizers were produced using either acidic extraction, anaerobic digestion or both of ensiled biomass of organic red clover and white mustard. The resulting fertilizers were applied to greenhouse-grown parsley either alone, or in combination with nitrogen (N)-enriched water produced by flushing acidic water with ammonia, to determine their effect on plant growth and the nutrient co

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Satria, Benni, Syahyan Raesi, Afrima Sari, et al. "TEKNOLOGI PENGOLAHAN PUPUK ORGANIK PADA KELOMPOK TANI SUNGKAI PERMAI DI KELURAHAN LAMBUNG BUKIK KOTA PADANG." Jurnal Hilirisasi IPTEKS 3, no. 3 (2020): 277–89. http://dx.doi.org/10.25077/jhi.v3i3.438.

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The people of Lambung Bukik Village, Pauh Subdistrict, Padang City, mostly work on horticultural crops, secondary crops, raising cattle, and chickens. Agriculture in this area uses mostly inorganic fertilizers and organic fertilizers. This results in the high need for farmers for inorganic fertilizers. The activity's objectives are 1. to obtain an organic production module by utilizing horticultural agricultural waste, secondary crops, and cow dung, 2. analyzing the organic fertilizer content, 3). obtain organic fertilizer containing high nutrient elements and 4. obtain organic fertilizer deri

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Ruma, Das, and Saha Dipankar. "Effect of liming on the changes of different forms of potassium in an acid soil treated with N and K fertilizers." Journal of Indian Chemical Society Vol. 91, Sep 2014 (2014): 1619–25. https://doi.org/10.5281/zenodo.5732773.

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Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur-741 252, Nadia, West Bengal, India <em>E-mail</em> : rumadas13@gmail.com <em>Manuscript received online 11 February 2014, revised 03 March 2014, accepted 08 March 2014</em> A laboratory experiment was conducted to study the effect of liming on the transformation of different forms of potassium in a strongly acidic silty loam soil (pH 4.56) treated with nitrogenous and potassic fertilizers. Irrespective of treatments, liming initially decreased the water soluble and exchangeable K but increased

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Sutriadi, Mas Teddy, Diah Setyorini, Deddi Nursyamsi, and Andarias Makka Murni. "Penentuan Kebutuhan Pupuk Kalium dengan Uji K-Tanah untuk Tanaman jagung di Typic Kandiudox." Journal of Tropical Soils 13, no. 3 (2018): 179–87. http://dx.doi.org/10.5400/jts.2008.v13i3.179-187.

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Fertilization of K is very important to increase product agriculture besides fertilization of N and P. In this time usage fertilizer not yet proportional and rational, such as those which happened in usage rice field fertilizer of K for the crop of paddy tend to excessively. The other way in the upland needing more fertlizer but fertilized slimmer or is not fertlized K. Proportional and rational fertilization can reach if pay attention the nutrients dynamics and soil status, and also requirement of nutrient for this crop to reach optimum production. This approach can be executed better and pro

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Batubara, Siti Fatimah, Novia Chairuman, Vivi Aryati, and Deddy Romulo Siagian. "Effects of Micronutrients (Mn and Zn) Fertilizer on the Growth and Production of Sorghum (Sorghum bicolor L.)." PLANTA TROPIKA 11, no. 2 (2023): 115–22. http://dx.doi.org/10.18196/pt.v11i2.15998.

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Micronutrients Mn and Zn are essential elements required in trace amounts, although they play an important role in plant growth. This study aimed to investigate the impact of manganese (Mn) and zinc (Zn) fertilizer on growth and productivity of sorghum. This study was conducted in farmer’s field at Pasar 6 Kwala Mencirim Village, Sei Bingai District, Langkat Regency, North Sumatera started in December 2020 until April 2021. A non-factorial randomized block design with eight treatments and four replications was used, consisted of control (without fertilizer), 100% N, P, K (local fertilizer reco

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Nurlaela, Endah, Rina Devnita, and Yuliati Machfud. "RESPONS KETERSEDIAAN KALIUM, SERAPAN K DAN HASIL JAGUNG MANIS TERHADAP APLIKASI DOSIS PUPUK NK MAJEMUK PADA INCEPTISOLS." Jurnal Pertanian Agros 27, no. 1 (2025): 118–30. https://doi.org/10.37159/jpa.v27i1.37.

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Fertilization is an agrotechnical method to improve soil fertility, which is crucial in increasing sweet corn production in Indonesia. Nutrient limitations in the soil often contribute to low corn yields. Inorganic fertilizers, such as compound NK fertilizers can provide essential nutrients for sweet corn. This study aims to identify the effects of different doses of compound NK fertilizers on available potassium (K), potassium uptake, and sweet corn yield. The research was conducted from October 2019 to January 2020 at the Experimental Farm and Soil Chemistry and Plant Nutrition Laboratory, D

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Setyorini, Diah, Wiwik Hartatik, I. Made Subiksa, and Dila Aksani. "Agronomic effectiveness, dry-matter, grain yield, nutrient uptake, and fertilizer use-efficiency of liquid organic fertilizer combined with NPK to sweet corn (Zea mays saccharata Sturt)." IOP Conference Series: Earth and Environmental Science 1165, no. 1 (2023): 012014. http://dx.doi.org/10.1088/1755-1315/1165/1/012014.

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Abstract The decline in agricultural land productivity due to climate change and excessive use of inorganic fertilizers requires us to implement an environmentally friendly cultivation system, by reducing the application rate of inorganic fertilizers and combining them with organic fertilizers. Liquid organic fertilizer (LOF) is one type of fertilizer that is expected to increase plant growth and yield and reduce the dose of inorganic fertilizers. The objective of this study was to examine the effect of LOF on growth, the yield of sweet corn, nutrient uptake, and the fertilizer use-efficiency

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Kumar, C. Vijaya, G. N. Gajanana, and B. Basavaraj. "Effect of Organic Manures on Soil Properties and Yield of Finger Millet (Eleusine Coracana) Gaertn." Mapana - Journal of Sciences 4, no. 1 (2005): 90–95. http://dx.doi.org/10.12723/mjs.6.16.

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Pot experiment was conducted during 1993 on ragi grown on a sandy clay loam soil to know the periodic changes in 0-15 cm soil depth on pH, organic carbon(O.C.),available N,P and K due to application of organic manure in conjunction with fertilizer. Application of organic manures alone or in combination with fertilizer increased the soil pH, organic carbon(O.C.),available N,P and K and grain yield when compared to NPK alone. The addition of FYM compared to green leaf manure and vermicompost increased soil pH significantly. The organic carbon(O.C.)content of GLM treated soil significantly superi

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Mancino, Charles F., Dianne Petrunak, and Douglas Wilkinson. "Loss of Putting Greens-grade Fertilizer Granules Due to Mowing." HortScience 36, no. 6 (2001): 1123–26. http://dx.doi.org/10.21273/hortsci.36.6.1123.

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The loss of fertilizer granules collected in turf clippings during routine putting green mowing has not been determined. The objective of this study was to quantify the amounts of greens-grade granular potassium (K) and nitrogen (N) fertilizers collected during the routine mowing of a `Pennlinks' creeping bentgrass (Agrostis palustris Huds.) putting green. In the first study, five K-containing granular fertilizers were applied at K rates of 2.43 and 4.86 g·m-2. A second study was also performed with six granular Ncontaining fertilizers and one liquid N fertilizer applied at an N rate of 4.86 g

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Fadlilla, Thanya, MTh Sri Budiastuti, and MMA Retno Rosariastuti. "Potential of Fruit and Vegetable Waste as Eco-enzyme Fertilizer for Plants." Jurnal Penelitian Pendidikan IPA 9, no. 4 (2023): 2191–200. http://dx.doi.org/10.29303/jppipa.v9i4.3010.

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This study aims to determine the source of eco-enzyme raw materials and the most appropriate dilution volume to produce quality eco-enzyme fertilizer for plant growth. 1 (sugar): 3 (fruit and vegetable waste): 10 (water). The resulting eco-enzyme liquid is processed into fertilizer through the dilution process. Eco-enzyme fertilizers from each raw material source contain different organic N, P, K, and C nutrients. Besides that, some enzymes are beneficial to plants. This research is experimental in the laboratory. The experimental design was factorial design using a completely randomized desig

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Nogalska, Anna, Marta Borsuk-Stanulewicz, Cezary Purwin, and Zenon Nogalski. "Quality of Maize Silage After Using Meat Bone Meal as a Phosphorus Fertilizer in a Field Experiment." Applied Sciences 15, no. 11 (2025): 6129. https://doi.org/10.3390/app15116129.

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The aim of this study is to determine the effects of increasing doses of meat and bone meal (MBM) and the year of the experiment on the feed value of maize silage. A three-year field experiment with silage maize was conducted. The following treatments were established: (1) zero-fert (no fertilization); (2) inorganic nitrogen (N), phosphorus (P), and potassium (K); (3) 1.0 t∙ha−1 MBM; (4) 1.5 t∙ha−1 MBM; (5) 2.0 t∙ha−1 MBM. Both N and K were applied at constant rates, while P was applied at increasing rates: 0.0, 45, 68, and 90 kg∙ha−1. Replacing conventional P fertilizer and, partially, N fert

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Ahenkorah, Y., B. J. Halm, M. R. Appiah, G. S. Akrofi, and J. E. K. Yirenkyi. "Twenty Years' Results from a Shade and Fertilizer Trial on Amazon Cocoa (Theobroma cacao) in Ghana." Experimental Agriculture 23, no. 1 (1987): 31–39. http://dx.doi.org/10.1017/s0014479700001101.

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SUMMARYThe effects of three shade densities, NPK fertilizers and fertilizer-pest/disease relationship on Amazon cocoa (Theobroma cacao L.) over a 20-year period are reported. Yields equivalent to the mean yield from the unfertilized plots were achieved in about 3, 4 and 6 years in fertilized plots under the no shade (S0), medium shade (S1) and heavy shade (S2) treatments, respectively. There were three growth phases, each characterized by a different yield trend. No appreciable changes in the exchangeable Ca and Mg were observed during the experiments, but K dropped to 68% of its initial value

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Ahenkorah, Y., B. J. Halm, M. R. Appiah, G. S. Akrofi, and J. E. K. Yirenkyi. "Twenty Years' Results from a Shade and Fertilizer Trial on Amazon Cocoa (Theobroma cacao) in Ghana." Experimental Agriculture 23, no. 1 (1987): 31–39. http://dx.doi.org/10.1017/s0014479700003380.

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SUMMARYThe effects of three shade densities, NPK fertilizers and fertilizer-pest/disease relationship on Amazon cocoa (Theobroma cacao L.) over a 20-year period are reported. Yields equivalent to the mean yield from the unfertilized plots were achieved in about 3, 4 and 6 years in fertilized plots under the no shade (S0), medium shade (S1) and heavy shade (S2) treatments, respectively. There were three growth phases, each characterized by a different yield trend. No appreciable changes in the exchangeable Ca and Mg were observed during the experiments, but K dropped to 68% of its initial value

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Ma, Rui Xia, Jing Shun Wang, Xiao Zhen Li, and Wen Cheng Liu. "Effect of Different NPK Fertilizers Cooperating Application on Yield and Quality of High Starch Maize." Applied Mechanics and Materials 214 (November 2012): 423–29. http://dx.doi.org/10.4028/www.scientific.net/amm.214.423.

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Effect of nitrogen, phosphorus and cooperation application on grain yield and qualities of high starch maize Zhengdan 18 was studied. Six different fertilization treatments based on the random-plot experiment. The results indicated that N fertilizer significantly increased yield, as compared with the non-fertilizer treatment, the yield with the combined application of N and P fertilizers was higher than that of maize with single N treatment, the yield with the combined application of N P and K fertilizers was superior to that of maize with the combined application of N and P fertilizers. The y

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Clark, Mary Jane, and Youbin Zheng. "Evaluating Fertilizer Influence on Overwintering Survival and Growth of Sedum Species in a Fall-installed Green Roof." HortScience 47, no. 12 (2012): 1775–81. http://dx.doi.org/10.21273/hortsci.47.12.1775.

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Vegetation success on green roofs in northern climates is challenged by extreme weather conditions, especially in winter, and is influenced by season of installation and substrate fertility. Appropriate fertilization with phosphorus (P) and potassium (K) can reduce winter injury for some plant species. The objectives of this study were to identify both the effect of P and K fertilizer rates on Sedum spp. survival over the first winter and the response of Sedum spp. growth to fertilizer rates when applied at installation. In a fall-installed extensive green roof system, survival, growth, and vi

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Puentes Montealegre, Nicolás, Johanna Santamaría Vanegas, Carlos Eduardo Ñústez-López, and Gladys Rozo. "Control of N-NH4+ and K+ leaching in potato using a carrageenan hydrogel." Agronomía Colombiana 40, no. 1 (2022): 85–97. http://dx.doi.org/10.15446/agron.colomb.v40n1.98526.

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Potato cultivation requires fertilizers to sustain crop yields, but a significant percentage of added nutrients is lost by leaching. The use of coating materials for fertilizers is currently being considered to reduce these losses. The objective of this study was to determine if a carrageenin based hydrogel (CBH), used to coat fertilizer, decreases NH4+ and K+ leaching from a potato crop without affecting growth, specific gravity, and tuber yield. The CBH was tested in a diploid potato crop, cultivar Criolla Colombia (Solanum tuberosum L., Phureja Group) using a randomized full block design in

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Nguyen, Tran Khanh Thi, Hieu Chi Bui, and Lang Thi Nguyen. "Effect of N, P K, Ca and Mg Fertilizer Application on Peanuts in Tra Vinh Province, Vietnam." International Journal of Environment, Agriculture and Biotechnology 9, no. 6 (2024): 092–98. http://dx.doi.org/10.22161/ijeab.96.13.

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This study was to evaluate the effects, determine the appropriate, fertilizers on peanut production. The experiment was installed in Tra Cu with two variety MD7, L14. Seven fertilizer treatments were designed. The treatments consisted of the application of T1:(Trichoderma sp + Bordeaux 1% + Probiotics 3M); T2: (organic fertilizer =10 ton/ha) ;T3:( Trichoderma sp + Bordeaux 1% + Probiotics 3M) + chemical fertilizers (35N-60P-60K + 150kg Ca + 40kg Mg ) + organic fertilizer 100%); T4: (Trichoderma sp + Bordeaux 1% + Probiotics 3M) + chemical fertilizers(35N-60P-60K + 150kg Ca + 40kg Mg ) + organi

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Steiner, Fabio, Maria Do Carmo Lana, Tiago Zoz, and Jucenei Fernando Frandoloso. "Changes in potassium pools in Paraná soils under successive cropping and potassium fertilization." Semina: Ciências Agrárias 36, no. 6Supl2 (2015): 4083. http://dx.doi.org/10.5433/1679-0359.2015v36n6sup2p4083.

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The changes in soil potassium pools under intense cropping and fertilized with potash fertilizer are still little known to the soils of Paraná State. The effects of potassium fertilization and successive cropping on changes in K pools in different soils of Paraná, Brazil, were investigated in this study. Twelve soil samples, collected from the upper layer 0–0.20 m, were fertilized or not with K and subjected to six successive cropping (i.e., soybean, pearl millet, wheat, common beans, soybean and maize). All the crops were grown for 45 days, and at the end of the second, fourth and sixth cropp

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