9th Science NCERT Chapter 12

One method of crop production that ensures high yield is inter-cropping, which involves growing two or more crops simultaneously on the same piece of land to reduce risk and provide insurance against the failure of one crop.

Manure and fertilizers are used in fields to supply essential nutrients to crops, enrich the soil with organic matter, increase soil fertility, and ensure good vegetative growth, leading to healthy plants and higher yields.

Inter-cropping and crop rotation help in maximizing land use efficiency, reducing crop failure risks, improving soil fertility, managing pests and diseases naturally, and ensuring sustainable agricultural practices.

Genetic manipulation is the alteration of an organism's genes using biotechnology. In agriculture, it is useful for developing crops with desired traits such as higher yield, resistance to pests and diseases, improved quality, and environmental adaptation.

Storage grain losses can occur due to factors like pests, molds, moisture, and inadequate storage conditions such as insufficient cleaning, drying, and fumigation practices, leading to the deterioration of grains over time.