crop requirement Articles
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Evaluating the effect of climate variation on the cost efficiency of a crop permit policy in Southern Sweden
Current international agreements call for a significant reduction of nitrogen loads to the Baltic Sea. New measures to reduce nitrogen loads from the agricultural sector and an increased focus on cost efficiency will be needed to meet reduction targets. For policy design and evaluation it is important to understand the impact of weather on the efficiency of abatement measures. One new proposed ...
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Lighting Strategies for Vine Crop Production
Pepper, tomato and cucumber crops require consistent levels of light for year round production. There are many things to consider before investing in a lighting solution and understanding your growing environment – and the goals you want to achieve – will help in choosing a system that best suits your needs. Having a reliable and efficient lighting system is important not only for ...
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Rajang Delta threatened by floods
This paper presents a case study of the Rajang Delta in Sarawak, Malaysia where peatland subsidence will cause flooding, rendering more than half of the Rajang Delta unsuitable for any agriculture cultivation due to severe floods in 50 years. The land area which will be inundated is 3 times the size of Singapore!! What a great loss! Case study summary: The case study reveals that about 87% of ...
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Effects of changes in climatic variables on maize crop water requirements in Huang–Huai–Hai watersheds, China
The study of crop water requirements (CWR) under climate change is critical for reasonable crop irrigation. In the present study, the effects of changes in climatic variables from 1961 to 2010 on maize CWR in Huang–Huai–Hai (HHH) watersheds in China were investigated. Five daily climatic factors including maximum temperature (Tmax), minimum temperature (Tmin), wind speed (u2), ...
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Changes in genetic diversity of U.S. flue-cured tobacco germplasm over seven decades of cultivar development
Plant breeding methodologies have been applied to flue-cured tobacco (Nicotiana tabacum L.) for approximately seven decades. As has been observed in several other crops, stringent quality requirements have resulted in use of conservative breeding strategies in the development of new cultivars. The impact of breeding practices on genetic diversity within U.S. flue-cured tobacco germplasm has not ...
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Prediction of daily crop reference evapotranspiration (ET0) values through a least-squares support vector machine model
Real-time prediction of daily reference crop evapotranspiration (ET0) is the basis for estimating crop evapotranspiration and for computing crop irrigation requirements. In recent years, least-squares support vector machines (LSSVMs) have been applied for forecasting in many fields of engineering. In this paper, LSSVMs are applied to forecast ET0 using public weather forecasting data (minimum and ...
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Relationship between Phosphorus and Nitrogen Concentrations in Spring Wheat
Efficient management of P in crop production requires the development of tools to quantify the P status of plants. Our objectives were to establish the relationship between P and N concentrations of spring milling wheat (Triticum aestivum L.) during the growing season and, in particular, to determine the critical P concentration required to diagnose P deficiency. Shoot biomass and P and N ...
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The future of agriculture: saving water with Hydroponic Crops
In the hydroponic crops, the plants complete their vegetative cycle without the necessity of using the soil. The water with mineral nutrition (total or partial) is provided through a solution in which the different essential nutrients for their development are dissolved. The future of modern agriculture goes through the optimal use of one of the most limited and most important resources: water. ...
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Top Dressing Fertilizer in Western Canada
Western Canada has a short growing season which makes another pass for top dressing fertilizer sometimes difficult to achieve. Many crops have the fertilizer applied during the seeding season with Liquid Distribution Systems, (like these kits we make here). Often this will meet the crops fertilizer requirements for the whole season. Making one pass makes sense in a season that brings the right ...
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Modeling the impacts of increase in temperature on irrigation water requirements in Palakkad district: a case study in humid tropical Kerala
Rise in temperature is one of the predicted impacts of climate change with significant implications on water resources management. An attempt has been made to calculate the water requirement of crops in different agro-ecological zones of Palakkad district in humid tropical Kerala using the CROPWAT 8.0 model. Sensitivity analysis was done for a simulated rise in temperature from 0.5 to 3.0 ...
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Male vs. female labour in an agroforestry system in the central highlands of Kenya: correcting the misconception
A study of male and female labour on food and cash crops was carried out in an agroforestry system in the Central Highlands of Kenya. The study tested the hypotheses that farmers concentrate most of their labour on crops with the highest gross margins whilst women concentrate most of their labour on food crops and males concentrate most of their labour on cash crops. A time allocation study was ...
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From (cyber)space to ground: new technologies for smart farming
Increased water demand and climate change impacts have recently enhanced the need to improve water resources management, even in those areas which traditionally have an abundant supply of water, such as the Po Valley in northern Italy. The highest consumption of water is devoted to irrigation for agricultural production, and so it is in this area that efforts have to be focused to study ...
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Irrigation Systems 101: What you need to know
In the perfect scenario everyone could rely on rainwater for their farming practices, but this is not always the case. This is why employing the right choice from the different irrigation systems available is crucial for agricultural success. Irrigation systems are basically an artificial way to provide water to fertile soil for agricultural purposes. Crop irrigation is necessary to overcome ...
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Performance evaluation of condensation–irrigation solar system under arid climate conditions
Scarcity of water, major critical concern in arid areas, has led to the use of low–quality irrigation water in agriculture in most of arid climate areas. The quality of water used for agriculture has to be reduced to a sustainable level that is also adapted to the environment. This paper presents the performance of a pilot condensation irrigation (CI) solar system in Tunisia under arid ...
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Flowering phenology and synchrony between volunteer and cropped spring wheat: Implications for pollen-mediated gene flow
Genetically engineered (GE) wheat (Triticum aestivum L.) volunteers could present a problem in cultivated wheat because they may facilitate movement of a GE trait to other volunteers or non-GE wheat crops. However, volunteers can emerge periodically throughout the growing season and, thus, flowering overlap with the crop may be largely asynchronous, presenting a significant barrier to gene flow. ...
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Sustainable oils receives pathway for California LCFS
Sustainable Oils Inc. issued a press release announcing the issuance of a feedstock-only pathway for the production of Camelina-based fuels under the California Low Carbon Fuel Standard (LCFS). According to the release, this action by the California Air Resources Board (CARB) results in Camelina being the only scalable, non-food based crop that meets both California and federal fuel standards ...
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Cattle manure application strategies effects on bahiagrass yield, nutritive value, and phosphorus recovery
Animal manure application based on crop N requirements often leaves excess P in the soil because of the differences in the N/P ratio in manures and that required by the plants. This experiment was designed to evaluate the effects of cattle (Bos taurus) manure applied alone or in combination with ammonium nitrate (AN) on bahiagrass (Paspalum notatum Flügge) dry matter (DM) yield, nutritive value, ...
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Reuse: Agriculture
Agronomic and water quality considerations Water use for agricultural irrigation is the largest component of water use in most countries and is more than 70% of human water use in drier countries. Use of recycled water for irrigation requires consideration of soil types, groundwater levels, soil and water chemistry, nutrient loads, limits on chemicals, the salt tolerance of crops, the ...
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The impact of climate change and soil salinity in irrigation water demand on the Gaza Strip
The presented work analyzes the potential impacts of the temperature, precipitation changes and water salinity on agricultural water demand. The study was carried out on five representative orchard crops (olive, palm, grapes, citrus and guava) that cover around 83% of the orchard farms in Gaza Strip. To achieve this goal, CropWat modeling software version 8.0 is used to calculate the ...
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Cattle manure application strategies effects on bahiagrass yield, nutritive value, and phosphorus recovery
Animal manure application based on crop N requirements often leaves excess P in the soil because of the differences in the N/P ratio in manures and that required by the plants. This experiment was designed to evaluate the effects of cattle (Bos taurus) manure applied alone or in combination with ammonium nitrate (AN) on bahiagrass (Paspalum notatum Flügge) dry matter (DM) yield, nutritive value, ...
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