Results 261 to 270 of about 682,902 (306)
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Journal of Agronomic Education, 1976
ABSTRACTChanging the expression of P and K in fertilizers from the oxide to the elemental basis has long been considered; all other plant nutrients have been expressed on the elemental basis for many years in most countries. A survey was made to determine the current status of the elemental vs. oxide expression of P and K in the USA.
R. D. Voss +2 more
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ABSTRACTChanging the expression of P and K in fertilizers from the oxide to the elemental basis has long been considered; all other plant nutrients have been expressed on the elemental basis for many years in most countries. A survey was made to determine the current status of the elemental vs. oxide expression of P and K in the USA.
R. D. Voss +2 more
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Journal of the Science of Food and Agriculture, 1953
Abstract1. The present paper gives a critical re‐examination of different data and conceptions on the action of sodium in relation to deficiency symptoms and yield response.2. The importance of sodium for different agricultural crops is discussed in relation to the replacement of potassium and independent sodium effects.3.
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Abstract1. The present paper gives a critical re‐examination of different data and conceptions on the action of sodium in relation to deficiency symptoms and yield response.2. The importance of sodium for different agricultural crops is discussed in relation to the replacement of potassium and independent sodium effects.3.
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Nature, 1945
I HAVE recently been attempting a valuation of potential fish production of the banks of the Seychelles-Mauritius arc. The figures following indicate that the suggestion to increase the fertility of suitable parts of the sea by the addition of fertilizers1 is an established process in certain places and circumstances in the ocean.
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I HAVE recently been attempting a valuation of potential fish production of the banks of the Seychelles-Mauritius arc. The figures following indicate that the suggestion to increase the fertility of suitable parts of the sea by the addition of fertilizers1 is an established process in certain places and circumstances in the ocean.
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Availability of Plant Nutrients
Soil Science Society of America Journal, 1937SummaryEasily water-soluble substances are classed as instantly available, therefore, not here discussed. Rate of becoming available of substances not easily water-soluble is the important question. How this is affected by some of the variables of the soil, the plant and the climate is indicated.
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Nature, 1944
Two difficulties have been raised by critics of the suggestion that, for the benefit of the fisheries, large-scale addition of plant nutrients to selected parts of the sea may be considered in the future1. The first difficulty concerns the quantities of nutrients required; Michael Graham describes these as "mountainous, nay astronomical"2, and Dr. W. R.
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Two difficulties have been raised by critics of the suggestion that, for the benefit of the fisheries, large-scale addition of plant nutrients to selected parts of the sea may be considered in the future1. The first difficulty concerns the quantities of nutrients required; Michael Graham describes these as "mountainous, nay astronomical"2, and Dr. W. R.
openaire +1 more source