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Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora
Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora

... along with _Potato leafroll virus_ belongs to the most important potato viruses. There are three main strains of PVY: PVY^O^, ...
Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora
Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora

... along with _Potato leafroll virus_ belongs to the most important potato viruses. There are three main strains of PVY: PVY^O^, ...
Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora
Consulta: subject:"Biology" Registros recuperados: 2.335 Data/hora

... along with _Potato leafroll virus_ belongs to the most important potato viruses. There are three main strains of PVY: PVY^O^, ...
Sugar Beet - van Veen Organics
Sugar Beet - van Veen Organics

... Response to applied phosphorus Time, form and method of application Sulphur Sulphur in soil Sulphur in plants Studies measuring yield response from applied sulphur Atmospheric deposition Potassium Potassium in soil Potassium in sugar beet Response to applied potassium Application recommendations bas ...
Southern Plants
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Fusarium oxysporum endophytes cubense
Fusarium oxysporum endophytes cubense

... banana (Panama disease), is considered to be one of the most serious threats to banana production in the world. There is no effective control measure for Fusarium wilt, except for the replacement of susceptible with resistant banana varieties. However, resistant varieties are not always acceptable t ...
Plant Nematology - Fichier
Plant Nematology - Fichier

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Native Species Planting Guide for New York City
Native Species Planting Guide for New York City

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THE EFFECT OF SEAWEED CONCENTRATE ON PLANT GROWTH
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1.30. How likely is the pest to spread rapidly in the PRA area by
1.30. How likely is the pest to spread rapidly in the PRA area by

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Tropical Fruits, 2ed - doc-developpement

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to see them, pdf - 3.0 Mb - European Weed Research Society

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Get cached PDF

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Base-cation saturation ratio

Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA) and claimed to be successfully in use on over a million acres (4,000 km²) of farmland worldwide. The traditional method, as used by most university laboratories, is known variously as the 'sufficiency level', sufficiency level of available nutrients (SLAN), or Index(UK) system. The sufficiency level system is concerned only with keeping plant-available nutrient levels within a well studied range, making sure there is neither a deficiency nor an excess. In the BCSR system, soil cations are balanced according to varying ratios often stated as giving 'ideal' or 'balanced' soil. These ratios can be between individual cations, such as the calcium to magnesium ratio, or they may be expressed as a percentage saturation of the cation exchange capacity (CEC) of the soil. Most 'ideal soil' theories stress both approaches. (See also – Cation exchange capacity)Strictly speaking, the 'base' cations are limited to calcium, magnesium, potassium, and sodium, and these are the primary nutrients that BCSR methods are most concerned with balancing. However, many proponents of 'ideal soil' theories also stress the importance of balancing the anions phosphorus, sulphur and chlorine as well as numerous minor and trace elements. The conventional SLAN system does not generally test for minor and trace elements unless there is sufficient cause to suspect a deficiency or toxicity.BCSR supporters argue that a soil balanced using their methods leads to greater crop yield and nutritional quality, as well as increasing the soil biological activity and the physical properties of tilth, aeration, and moisture retention. There is currently no publicly available research or trial data to support these claims, but BCSR systems are fairly widely used in organic farms and many positive testimonials from farmers and gardeners can be found on the internet and in alternative agriculture literature. Under most circumstances following BCSR systems will not lead to negative effects. The main concern for farmers is simply the unnecessary expense of applying soil amendments beyond what the crop can actually utilise.
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