ABSTRACT To examine the hypothesis that the soil microbial community in a nitrogen (N) limited forest responds to moderately elevated N deposition (< 10 kg ha−1 yr−1), correlations between N deposition and soil microbial properties were analyzed in a cool temperate forest surrounded by normally fertilized pasture grasslands in northern Japan. Three experimental plots were established in forest edges

ABSTRACT Sodification is a major soil problem that limits plant productivity in arid and semi-arid regions. For ameliorating sodic soils, the application of chemical amendments that can release calcium (Ca), which expels soil exchangeable sodium (Na), is the most widely accepted approach for solving this problem. However, an alternative more economical method would be desired in developing countries

ABSTRACT Selenium (Se) is an essential element for the human body. Humans meet their basic Se requirements primarily through food consumption. The largest Se-rich contiguous area in China is located in the southeast of Guangxi. In this study, the Se accumulation and translocation in the Guangxi rice–soil system was assessed. Organically bound Se (O-Se) was found to be the main type of soil Se (72.5%)

ABSTRACT Previous studies found that non-uniform salt stress could alleviate salt damage to plants compared to uniform salt treatment. The root system of tomato was divided into two parts, including salt-free treatment (NaCl concentrations were zero in both root systems), non-uniform salt stress with a NaCl concentration of 0.1% in one side of the roots (0.1%, 0.3%; 0.1%, 0.5%), non-uniform salt stress

ABSTRACT Salt-affected reclaimed tidelands (RTLs) in coastal areas of South Korea are commonly used for rice (Oryza sativa L.) cultivation as excessive salts are removed through leaching by irrigation during rice growth. However, changes in soil properties and rice growth in RTLs by continuous rice cultivation are not well understood. In the present study, we investigated soil salinity indices (ECe

(2021). Abstracts of Nippon Dojo-Hiryogaku Zasshi 92-01. Soil Science and Plant Nutrition: Vol. 67, No. 3, pp. 353-354.

(2021). Abstracts of Nippon Dojo-Hiryogaku Zasshi 92-02. Soil Science and Plant Nutrition: Vol. 67, No. 3, pp. 355-357.

ABSTRACT The success of the dwarf breeding of rice and wheat, called the Green Revolution, was due to increased source and sink capacities, which depended on large increases in N fertilizer inputs. However, today’s high N fertilization has an extremely large impact on the environment. While there have been disputes as to whether photosynthetic improvement leads to an increase in crop yields, transgenic

ABSTRACT Nitrogen-based fertilizer applications have an effect on nitrification and nitrifying microorganisms in acidic soils of agricultural and forest lands. However, the effect of different nitrogen (N) fertilizers on nitrification and nitrifying microorganisms in acidic Ultisols of the subtropical regions are not well studied. Here, we investigated the effect of ammonium sulfate and urea applications

ABSTRACT Organic matter (OM) application is a possible solution to carbon (C) sequestration. Among the soil pedogenic factors for volcanic ash, time of exposure to weathering affects formation of short-range ordered minerals and soil organic carbon (SOC) accumulation. This study aimed to evaluate the effect of long-term OM application with the vertical infiltration of OM on different ages of Andosols

ABSTRACT Rice straw (RS) and cow dung compost (CDC) are good sources of phosphorus (P) to support rice production. Our previous research found that CDC application in mixed crop-livestock systems supplied more total P to the paddy soil than RS, but available P did not differ significantly between the CDC and RS fields. To explain these results, we investigated the soil total P and soil P balance in

ABSTRACT Application of bio-fertilizer with the ability to promote root development in legume plants could be beneficial, and it is vital to find an inoculation method that does not inhibit symbiosis between rhizobium and plants. However, co-inoculation of rhizobia with different microorganisms on legumes generally inhibits interdependency with rhizobia. The present study was conducted to determine

ABSTRACT We evaluated the use of manganese-containing amendments (Mn amendments) to improve the Mn uptake of a low-cadmium (Cd) rice cultivar, Koshihikari Kan No.1 (Oryza sativa L.), with a loss of function in the OsNramp5 that transports Mn and Cd, which was developed from an elite japonica cultivar Koshihikari. A flooded soil incubation experiment demonstrated that an increase of dissolved Mn in

ABSTRACT Methane is a greenhouse gas that contributes to global warming and paddy fields are an important source of methane emission. Methanogenic archaea and methane-oxidizing bacteria inhabiting paddy soil ecosystem play crucial roles in the methane emission from paddy fields. This literature review summarizes progress of ecological studies on methanogenic archaea and methane-oxidizing bacteria inhabiting

ABSTRACT Plants are known to develop cross-tolerance in which plants tolerate to one stress following prior exposure to another stress. In this study, we investigated this phenomenon in rice (Oryza sativa L.) to elucidate the underlying physiological mechanisms. Twenty-one (21) day-old seedlings were pre-exposed to various concentrations of NaCl, NaHCO3, and H2O2 for 7 days and then subjected to saline-alkaline

ABSTRACT The chitin-hydrolyzed product LMC60 contains low-molecular-weight chitin (LMwC) with an average molecular weight of approximately 3,000 and sodium chloride formed by neutralization process. LMwC and a soil amendment with LMC60 (SLMC60) showed suppressive effects on plant diseases caused by pathogenic microbes. The spectrum of plant diseases against which SLMC60 was effective is however distinct

ABSTRACT Pyrogenic carbon (PyC) or black carbon (BC), the residue of grassland and forest fires and fossil fuel combustion, plays an important role in carbon storage and pollutant adsorption in soil. To understand its roles in soil, it is necessary to accurately assess the PyC fraction. Soil is, however, a complex mixture of inorganic and organic matter, usually containing humic substances, i.e., non-PyC

ABSTRACT The Green Revolution (GR) made a major contribution to increasing the rice yield in the Philippines from 1.3 t ha−1 in 1966 to 4.0 t ha−1 in 2018, but the changes in paddy soil fertility that occurred during this 50-year period remain unknown. We collected 37 soil samples from the plow layers of paddy fields in Luzon, Leyte, Panay, and Mindanao in the Philippines in 2016 and 2017 (the ‘2010s’)

ABSTRACT Thermal processing has been promoted to recycle phosphorus (P) contained within animal bone. There is a dearth of information on the mechanisms that control P solubility and availability from thermally treated bones. Chemical extraction, XRD, and FTIR were used to elucidate P solubility, and incubation and pot experiments to evaluate P bioavailability from different animal bones, thermal processing

ABSTRACT Graminaceous cereal crops as well as all other green plants require iron (Fe), as Fe is a component of heme and [Fe-S] clusters in the photosystems (PSI, PSII) containing green pigments (chlorophylls). The interveinal yellowing (Fe chlorosis) of growing leaves is caused by insufficient Fe uptake and internal delivery. In the 1970s, Sei-ichi Takagi discovered Fe3+-chelating mugineic acid family

(2021). Correction. Soil Science and Plant Nutrition. Ahead of Print.

ABSTRACT Electrolytes have been verified as a vital internal factor controlling soil aggregate stability (SAS). Several reports have focused on whether potassium promotes or demotes SAS and have shown contradictory results in different soils and clay mineralogy. Only a few studies have investigated such an effect on a soil-plant system, even though this information is critical for soil management practices

ABSTRACT In the Mekong Delta, triple rice cropping is widely spread. The rice cultivation is characterized by a short cropping period and nearly year-round flooding. Putting the soil under an oxidative condition through changing the water regimes during cropping periods might have a potential to increase the rice yield. To test this potential, an experiment was conducted at a typical triple-cropping

ABSTRACT Revealing the dynamics of soil organic carbon (Corg) and nutrients at aggregate scales is essential for improving our understanding of soil Corg mitigation and nutrient restitution in the Cunninghamia lanceolata plantations. In this study, soil Corg, total nitrogen (Ntot), available phosphorus (Pava), and exchangeable cations (including calcium (Ca2+), magnesium (Mg2+), potassium (K+), and

ABSTRACT Previous studies have reported two major methods of increasing PR solubility; calcination and partial acidulation. In addition, soil water condition would influence the solubility of P fertilizers. However, the effects of local P fertilizers, namely calcined PR (CPR) and partially acidulated PR (PAPR) on rice yield under different soil water conditions have not been explored comprehensively

ABSTRACT Organic rice farming is acknowledged as a safe and environmentally friendly rice production method. However, the application of fresh organic matter as fertilizer can increase methane (CH4) emissions during the rice-growing period because it is a carbon (C) source for CH4 under anaerobic conditions. In this study, we evaluated the CH4 emissions and net greenhouse gas emissions (NGHGE) from

ABSTRACT A field experiment was conducted during the rainy season of 2014, in the steeply sloping agricultural land of northern Laos to determine the factors that cause the generation of surface runoff water and sediment (i.e., soil erosion). Four treatments (upland rice cropping, maize cropping, maize cropping with mulch treatment, and bare land) were installed on a 2 square meters plot sloping 25°

ABSTRACT Arbuscular mycorrhizal fungi (AMF) can regulate the absorption of micro- and macro-nutrients and promote the growth and development of plants. The purpose of this study was to investigate the effect of AMF colonization on the Si absorption of tomato. Through potted planting experiment in the greenhouse, the symbiotic system of tomato seedlings and AMF, including Glomus versiforme (Gv), Funneliformis

ABSTRACT Increasing carbon storage in soil is a potential measure against global warming, but the mechanisms of carbon accumulation in soil are not well understood. Clarifying the mechanism would help in the development of new methods for soil carbon storage, such as in agricultural systems. We grew high-biomass forage rice cultivars for 11 years under conditions of potassium and silicic acid deficiency

(2021). Correction. Soil Science and Plant Nutrition: Vol. 67, No. 2, pp. 207-207.

(2021). Abstracts of Nippon Dojo-Hiryogaku Zasshi 91-06. Soil Science and Plant Nutrition: Vol. 67, No. 2, pp. 208-209.

ABSTRACT Nitrogen (N) fixation by rhizobia plays an important role in N assimilation of soybean (Glycine max). Nitrogenase, the enzyme responsible for N fixation in rhizobia, contains a large amount of sulfur (S) molecules and requires phosphorus (P) in adenosine triphosphate. Thus, S and P are essential for plant growth and N fixation by rhizobia. However, P in soils forms insoluble PO43 – salts with

ABSTRACT We designed a new approach for modeling the nitrous oxide (N2O) derived from nitrogen (N) mineralization associated with loss of soil organic matter (SOM) that meets the current IPCC guidelines (GL) because the method currently used in the National GHG Inventory Report (NIR) of Japan does not. Loss of soil carbon (C) was calculated by using the previously developed nationwide soil C calculation

ABSTRACT The capacity for regeneration of the substrate for Rubisco, ribulose 1,5-bisphosphate (RuBP), is one of the candidates for the bottleneck in photosynthesis in transgenic rice plants with overproduction of Rubisco. As the overproduction of chloroplast glyceraldehyde-3-phosphate dehydrogenase (GAPDH) was suggested to slightly enhance RuBP regeneration capacity, transgenic rice plants with co-overproduction

ABSTRACT We monitored fatty acid compositions of the triacylglycerol (TAG) fractions in flax (Linum usitatissimum L.) seeds cultivated in pots with different seeding dates and nitrogen (N) fertilizing conditions in a temperate region Wakayama, Japan. Five flax cultivars were seeded in early and late December 2017, and in late January 2018, and matured in May, June and July in the order of planting

ABSTRACT Intercropping with cereal and phosphorus (P)-mobilizing leguminous crops is a traditional agricultural practice in Sub-Saharan Africa. It is essential to evaluate the effect of intercropping (i.e., rhizosphere sharing) on fractionated rhizosphere soil P dynamics under the various soil P conditions and legumes, to improve the soil-plant P dynamics in this region. This study aimed to identify

ABSTRACT Transferring plants between different nutritional media is a common technique in plant nutrition research. Solidified sterile media are often used for plant culture and subsequent transfer experiments. Transplanting is generally performed one plant at a time using sterile tweezers. This method has several challenges: it is time-consuming, which makes analyzing short-term responses to nutritional

ABSTRACT Surface geology is a key factor regulating the geographical patterns of P export; however, geographically extensive data on P export mechanisms from natural coastal mountain regions are lacking. We compared stream-water characteristics in forested headwater catchments with different types of surface geology (marine sedimentary rocks [MSRs] and igneous rocks [IRs]) and evaluated the factors

ABSTRACT Calcareous, alkaline and kaolinite soils, despite external P fertilization, are low in plant extractable P because of their P fixing nature. Use of Arbuscular mycorrhizal fungi (AMF) and phosphate solubilizing bacteria (PSB) are eco-friendly technologies for enhancing plant P nutrition and total crop production. However, use of potentially viable amongst numerous strains is of significant

ABSTRACT Identifying the soil properties that control soil organic carbon (SOC) storage is a critical step to monitor and manage SOC at regional and global scales. While clay content has been commonly used to explain SOC variation and to model SOC dynamics, recent studies point to the significant control of extractable metal phases such as pyrophosphate extractable Al (Alp) for a range of soil types

ABSTRACT Precise use of fertilizers has been a focal point in world agriculture for years because it increases crop production and reduces the negative impact of over-fertilization. Smart fertilizer management using information/data, sensors, and smart tools allows correct fertilization in precision agriculture, smart agriculture, and integrated nutrient management. Recent progress in prediction methods

ABSTRACT Soil salinization in the Yellow River Delta, China, is a matter of concern from agricultural and environmental perspectives. This study characterizes the relationship between the permeability and microstructure of saline–alkali soil. Soil microstructure, including mineral composition, pore distribution, and particle morphology of soils at different depths, was analyzed using X-ray diffraction

ABSTRACT Soil acidification induced by nitrogen (N) deposition has important effects on species diversity and ecosystem function. The potential role of phosphorous (P) limitation on these effects was overlooked and observed only after decades of atmospheric N deposition. Few studies have addressed the long-term effect of P addition on soil acidification resulting from N deposition. Changes in precipitation

ABSTRACT Fertilizer-derived P is accumulated in cropland soils and their phytoavailability is variable depending on the speciation of P, which is affected by soil properties. In this study, we aimed to clarify how soil properties affect the speciation of P accumulated in fertilized soils. Soil samples were collected from the cultivated soil layers of 137 vegetable fields in Aichi prefecture, Japan

ABSTRACT Rice cultivation and ruminants are the top two sources of methane (CH4), a potent greenhouse gas, in agriculture. The supplementation of ruminants with cashew nut shell liquid (CNSL), a by-product of the cashew nut industry, can reduce CH4 production through alteration of the rumen microbiota. To assess the effects of CNSL addition and its rate on rice growth and CH4 emissions from a paddy

ABSTRACT The soil cation exchange capacity (CEC), which is contributed by constant and variable charges, is a vital indicator of soil fertility and affects elemental cycling. Climate is expected to affect soil CEC by controlling soil secondary minerals and organic matter distributions. The objective of this study was to clarify the effects of climate on the charge characteristics of the soil in Mt

ABSTRACT To clarify the effects of long-term fertilization on the depth profile of plant nutrients and soil acidity in non-allophanic Andosols, a soil survey was conducted on fertilized grassland and adjacent secondary forest in Kuju highland, Oita Prefecture, Japan. Both of the experimental plots had been managed as a semi-natural grassland (managed by cutting, mowing, and burning for raising cows)

(2021). Enhancement of the nitrogen-fixing activity of paddy soils owing to iron application. Soil Science and Plant Nutrition: Vol. 67, No. 3, pp. 243-247.

ABSTRACT This study aimed to explore the effect of Chinese milk vetch (CMV) on soil fertility and rice production in double rice cropping systems. A field experiment was conducted including the following six treatments: Ck (no NPK mineral fertilizer and no CMV), CMV0 (NPK mineral fertilizer and no CMV), and CMV1–4 (NPK mineral fertilizer and 7500 kg ha−1 CMV, 15,000 kg ha−1 CMV, 22,500 kg ha−1 CMV

(2020). Preface to the special section “Research frontiers on the use of sensing technologies and ICT for soil and fertilizer managements (Sensing-ICT)”. Soil Science and Plant Nutrition: Vol. 66, No. 6, pp. 797-797.

(2020). Acknowledgment to the Reviewers. Soil Science and Plant Nutrition: Vol. 66, No. 6, pp. 919-920.

ABSTRACT Flax (Linum usitatissimum L.) is an important industrial crop in fiber production. This study is aimed to isolate specific germplazms with high potassium efficiency. Totally 50 flax germplazms were planted in an experimental field in Heilongjiang, China (126°28′E, 46°27′N). Fertilizer was applied under the soil before seeding with two potassium levels (K0, 0 kg/ha K2SO4; K50, 50 kg/ha K2SO4)

(2021). Correction. Soil Science and Plant Nutrition: Vol. 67, No. 2, pp. 206-206.

ABSTRACT Agriculture depends on nitrogen (N) fertilizer, but its continuous application also causes several serious ecological and environmental problems. In desert oasis farmlands, environmental issues caused by N loss from excessive chemical N application have been previously reported. However, assessed N loss from desert oasis farmland ecosystems in northwestern China is lacking. Here, we assess

ABSTRACT Agriculture depends on nitrogen (N) fertilizer, but its continuous application also causes several serious ecological and environmental problems. In desert oasis farmlands, environmental issues caused by N loss from excessive chemical N application have been previously reported. However, assessed N loss from desert oasis farmland ecosystems in northwestern China is lacking. Here, we assess

ABSTRACT There have been few studies in Japan on the effects of the application of lime materials, especially in regard to the soil calcium-to-magnesium ratio (Ca:Mg). The aim of this study was to explore the effects of changes in the soil Ca:Mg on soybean growth via pot and field tests over two growing seasons: 2018–2019. The field tests were conducted in two different fields, one in each year, and

ABSTRACT The increasing demand for sugarcane residue to produce industrial biofuels competes with organic-matter inputs to tropical soils for increasing fertility. Soil nitrogen (N) availability to plants and carbon (C) storage can be optimized by the selection of substrate types and quantities. We tested whether substrate-induced microbial growth increases soil N mineralization and C stabilization

(2021). Acknowledgment to the Reviewers. Soil Science and Plant Nutrition. Ahead of Print.

ABSTRACT Salinity is one of the major problems when it comes to soil fertility and agricultural productivity. In this regard, this study aimed to elucidate the influence of four salinity levels (0, 20, 50, 100 mM NaCl) on the soybean growth and the nodulation by rhizobia inoculated on the soybean variety CNS. Additionally, the compatibility of soybean varieties with the seven representative strains

ABSTRACT The root phosphorus (P) uptake efficiency (RE), defined as plant P uptake per unit root mass or root area, may contribute to the P efficiency of upland rice grown in acid, P-deficient soils. The identification of root traits conferring RE of rice has been compromised by the lack of attention given to P speciation when evaluating P-mining mechanisms. Here we disentangled the effect of soluble