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Your search for [subject]Soils -- Nitrogen content returned 24 records. |
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Carbon, nitrogen and prosphorus status of volcanic and limestone soils in Leyte.
by Sueta, Juvia Pancho.; 2006.
Subject: Volcanic soils -- Philippines -- Leyte; Soils -- Nitrogen content; Soils -- Carbon content; Soils -- Phosphorus content.
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Performance of white potato (Solanum tuberosum L.) under varying soil moisture regimes and nitrogen-potassium levels.
by Alipit, Percival B.; 1980.
Subject: Potatoes -- Fertilizers and manures; Soil moisture; Soils -- Nitrogen content; Soils -- Potassium content.
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Nitrogen and potassium requirement determination and their influences on Arayat spandy clay loam planted to sweet potato (Ipomoea batatas L.).
by Paz, Alicia Mina.; 1982.
Subject: Soils -- Nitrogen content; Soils -- Potassium content; Sweet potatoes -- Fertilizers and manures.
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Nitrogen and rice.
Los Banos, Laguna: IRRI, 1979.
Subject: Plants, Effect of nitrogen on; Nitrogen -- Fixation; Rice; Soils -- Nitrogen content.
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Role of the blue-green algae in nitrogen economy of Indian agriculture.
by Singh, R N botanist; New Delhi: Indian Council of Agricultural Research, 1961.
Subject: Nitrogen -- Fixation; Soils -- Nitrogen content; Soils -- India; Algae.
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Nitrogen movements in water draining from irrigated riceland.
by Singh, Virandra Pal.; [College, Laguna]: V.P. Singh, 1978.
Subject: Water -- Nitrogen content; Soils -- Nitrogen content.
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Microbiological transformations of nitrogen in flooded maahas clay.
by Manguiat, Ireneo Javier, 1945-; 1970.
Subject: Soils -- Nitrogen content; Nitrification; Nitrogen fertilizers.
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Microbiological transformations of nitrogen in flooded maahas clay [microform].
by Manguiat, Ireneo Javier, 1945-; Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Subject: Soils -- Nitrogen content; Nitrification; Nitrogen fertilizers.
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In situ determination of biological nitrogen fixation by blue-green algae in lowland rice fields [microform].
by Alimagno, Bonifacio Villanueva, 1947-; Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
Subject: Soils -- Nitrogen content; Nitrogen -- Fixation; Algae.
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Effects of soil types, nitrogen rates, and location on the growth and yield of white potato.
by Dazon, Preston M.; College, Laguna: P.M. Dazon, 1982.
Subject: Soils -- Classification; Soils -- Nitrogen content; Potatoes -- Fertilizers and manures; Soil fertility.
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