Cropping techniques

The intense floristic evolution has forced farmers to re-think their control strategy every four to five years, adapting it to a target that has in the meantime been changed owing to the selection pressure exercised by different parts of the cropping technique, weed control in particular. Table... 

Living cationic ring-opening polymerization (CROP) techniques represent important methods for the polymerization of a wide variety of heterocyclic monomers, such as cyclic ethers, cyclic amines, and cyclic imino ethers [7, 84-87]. The main differences between carbocationic polymerization of vinyl monomers and CROP of heterocyclic monomers arise from the nucleophilic heteroatoms... 

CROP techniques are in general restricted to variations in solution conditions and less to bulk properties [28,30]. Although widely used for the synthesis of polymers with a well-defined size and composition, they require an appropriate catalyst in order to proceed, and to obtain polymers with controllable properties. 

Cropping techniques 205 Table 8.3 Time of absorption of water by various soils... 

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