Materi Kuliah Kesuburan Tanah

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Belerang from Andrew Gates

Dynamics of k in soils and their role in management of k nutrition from Andrew Gates

Kalium from Andrew Gates

Kalsium dan magnesium from Andrew Gates

Management of soil phosphorus and plant adaptation from Andrew Gates

Managing potassium for crop production from Andrew Gates

Nitrogen fixing microorganisms from Andrew Gates

Nitrogen in environment from Andrew Gates

Nitrogen from Andrew Gates

Pendahuluan 1 from Andrew Gates

Pendahuluan 2 from Andrew Gates

Phosfor from Andrew Gates

Potassium 1 from Andrew Gates

Potassium in agriculture from Andrew Gates

The story of phosporus from Andrew Gates