"Factors affecting crop growt; Nitrogen and mineral requirements of crops; Water requirements of crops; Origin and classification of soils; Chemical composition of soils; Some biological processes in soils; Some physical properties of soils; The water in soils; The air in soils; The soil solution; The control of soil water; The mechanical improvement of soils; Supplying organic matter; Botating crops; Nitrogen economy in soils; Mineral economy in soils."
"Factores affecting plant growth; Nitrogen and mineral requirements of crops; Water requirements of plants; Origin and classification of soils; Chemical composition of soils; Some biological processes in soils; Some physical properties of soils; Soil water; Soil air; Soil solutions; Control of soil water; Plowing and cultivating; Organic matter; Soil conservation; Animal agriculture; Nitrogen resources; Phosphorus resources; Potassium resources; Calcium resources; Magnesium resources; Sodium resources; Sulfur resources; Trace elements; Mixed fertilizers; Selection and use of fertilizers; Yeld potentialities of crop plants; Miscellaneous topics."
"Factors affecting crop growth; Nitrogen and mineral requirements of crops; Water requirements of crops; Origin and classification of soils; Chemical composition of soils; Some biological processes in soils; Some physical properties of soils; The water in soils; The air in soils; The soil solution; The control of soil water; The mechanical improvement of soils; Supplying organic matter; Rotating crops; Nitrogen economy in soils; Mineral economy in soils; Limestone economy in soils; The livestock system of farming; Soil sanitation; Controlling the soil reaction nitrogen fertilizers; Phosphoric acid fertilizers; Potash fertilizers; Mixed fertilizers; The selection of fertilizers; The application of fertilizers."
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.
This is a placeholder reference for a Topic entity, related to a WorldCat Entity. Over time, these references will be replaced with persistent URIs to VIAF, FAST, WorldCat, and other Linked Data resources.