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Full-Text Articles in Life Sciences
Bulletin No. 310 - The Influence Of Cropping On The Nitrogen, Phosphorus And Organic Matter Of The Soil Under Irrigation Farming, J. E. Greaves, C. T. Hirst
Bulletin No. 310 - The Influence Of Cropping On The Nitrogen, Phosphorus And Organic Matter Of The Soil Under Irrigation Farming, J. E. Greaves, C. T. Hirst
UAES Bulletins
Most soils contain sufficient nutrients for normal plant growth, with the exception of nitrogen, phosphorus and potassium. These elements are used by plants in the largest quantities and the amounts of these in the soil govern its productivity. Soil organic matter is of prime importance for it is the matrix which holds the nitrogen and modifies the structure, temperature, and water-holding capacity of the soil. The organic matter is the very life of the soil, for it is in and on it that bacteria work and by so doing determine the kind and speed of reactions which occur. It is …
Bulletin No. 274 - Influence Of Rotation And Manure On The Nitrogen, Phosphorus, And Carbon Of The Soil, J. E. Greaves, C. T. Hirst
Bulletin No. 274 - Influence Of Rotation And Manure On The Nitrogen, Phosphorus, And Carbon Of The Soil, J. E. Greaves, C. T. Hirst
UAES Bulletins
All agricultural plants require carbon, hydrogen, oxygen, nitrogen, calcium, potassium, magnesium, sulfur, phosphorus, iron, and probably traces of other elements for their normal growth and fruition. The growth of farm crops is dependent upon an available supply of these elements, and the extent of growth is governed by the one present and available in least quantity in proportion to the plant's needs. Of the essential elements, all plants secure two (carbon and oxygen) from the air, one (hydrogen) from the water, and the others from the soil. Most soils contain sufficient plant nutrients for normal plant production, with the exception …
Bulletin No. 247 - Effect Of Manure And Of Phosphorus Fertilizer On The Yield And Composition Of Alfalfa Hay, D. W. Pittman
Bulletin No. 247 - Effect Of Manure And Of Phosphorus Fertilizer On The Yield And Composition Of Alfalfa Hay, D. W. Pittman
UAES Bulletins
It has frequently been observed by practical stockmen that alfalfa hay produced on poor unproductive land has a much lower feeding value than hay produced on good productive land. Some have also observed that by the use of a supplemental feed rich in phosphorus (such as steamed bone-meal), the feeding value of this poor quality alfalfa hay may be improved, indicating that phosphorus deficiency is at least one cause of its low feeding value.